TY  - JOUR
AU  - Simović, Bojana
AU  - Poleti, Dejan
AU  - Golubović, Aleksandar
AU  - Matković, Aleksandar
AU  - Šćepanović, Maja
AU  - Babić, Biljana M.
AU  - Branković, Goran
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1081
AB  - In this work, Zn(CH3 COO)(2) 2 H-2 O with AgNO3 content from 0 to 6 mol% was solvothermally treated at 120 C for 18 h in the presence of poly(vinyl pyrrolidone), ethylene glycol and sodium hydroxide. The structural , microstructural and photocatalytic properties of the unmodified and Ag modified ZnO powders have been investigated by the XRPD, FESEM, TEM, UV-vis, Raman and BET techniques. The Ag modified samples consist of ZnO nanocrystals and metallic Ag on the surface. The average crystallite size of all samples was about 20 nm. The FESEM revealed the uniformity in size and approximately spherical shape of ZnO nanopar-ticles. The BET data suggest that all prepared samples are mesoporous. All prepared samples showed higher photocatalytic efficiency in the degradation of the Reactive Orange 16 (RO16) azo dye than the commercial ZnO. In addition, Ag modified ZnO powders, especially those with 1.5 and 0.75 mol% of Ag, were more efficient than the unmodified one.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Enhanced photocatalytic degradation of RO16 dye using Ag modified ZnO nanopowders prepared by the solvothermal method
EP  - 38
IS  - 1
SP  - 27
VL  - 11
DO  - 10.2298/PAC1701027S
ER  - 

@article{
author = "Simović, Bojana and Poleti, Dejan and Golubović, Aleksandar and Matković, Aleksandar and Šćepanović, Maja and Babić, Biljana M. and Branković, Goran",
year = "2017",
abstract = "In this work, Zn(CH3 COO)(2) 2 H-2 O with AgNO3 content from 0 to 6 mol% was solvothermally treated at 120 C for 18 h in the presence of poly(vinyl pyrrolidone), ethylene glycol and sodium hydroxide. The structural , microstructural and photocatalytic properties of the unmodified and Ag modified ZnO powders have been investigated by the XRPD, FESEM, TEM, UV-vis, Raman and BET techniques. The Ag modified samples consist of ZnO nanocrystals and metallic Ag on the surface. The average crystallite size of all samples was about 20 nm. The FESEM revealed the uniformity in size and approximately spherical shape of ZnO nanopar-ticles. The BET data suggest that all prepared samples are mesoporous. All prepared samples showed higher photocatalytic efficiency in the degradation of the Reactive Orange 16 (RO16) azo dye than the commercial ZnO. In addition, Ag modified ZnO powders, especially those with 1.5 and 0.75 mol% of Ag, were more efficient than the unmodified one.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Enhanced photocatalytic degradation of RO16 dye using Ag modified ZnO nanopowders prepared by the solvothermal method",
pages = "38-27",
number = "1",
volume = "11",
doi = "10.2298/PAC1701027S"
}

Simović, B., Poleti, D., Golubović, A., Matković, A., Šćepanović, M., Babić, B. M.,& Branković, G.. (2017). Enhanced photocatalytic degradation of RO16 dye using Ag modified ZnO nanopowders prepared by the solvothermal method. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 11(1), 27-38.
https://doi.org/10.2298/PAC1701027S

Simović B, Poleti D, Golubović A, Matković A, Šćepanović M, Babić BM, Branković G. Enhanced photocatalytic degradation of RO16 dye using Ag modified ZnO nanopowders prepared by the solvothermal method. in Processing and Application of Ceramics. 2017;11(1):27-38.
doi:10.2298/PAC1701027S .

Simović, Bojana, Poleti, Dejan, Golubović, Aleksandar, Matković, Aleksandar, Šćepanović, Maja, Babić, Biljana M., Branković, Goran, "Enhanced photocatalytic degradation of RO16 dye using Ag modified ZnO nanopowders prepared by the solvothermal method" in Processing and Application of Ceramics, 11, no. 1 (2017):27-38,
https://doi.org/10.2298/PAC1701027S . .

TY  - CONF
AU  - Zdravkovic, Jelena
AU  - Radovanovic, Lidija
AU  - Simović, Bojana
AU  - Poleti, Dejan
AU  - Rogan, Jelena
AU  - zekovic, ivana
AU  - Dramicanin, Miroslav
AU  - Mihajlovski, Katarina
AU  - Radovanovic, Zeljko
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3109
AB  - Studies related to the synthesis of nanosized ZnO as the antibacterial agent have become an
interdisciplinary area gathering chemists, physicists, biologists, and medics. The broad scope
of materials based on ZnO resulted in the development of various techniques for its
preparation. Considering the dependence of particle shape and size onto physical and
chemical properties of ZnO, the synthesis procedure is of major importance.
In this work, an unconventional methodology of synthesis is proposed for obtaining
nanosized ZnO. Polymeric zinc complex containing 2,2’-dipyridylamine (dipya) and dianion
of 1,3-benzenedicarboxylic acid (ipht), [Zn(dipya)(ipht)]n, was used as precursor. Besides
the crystal structure of [Zn(dipya)(ipht)]n which was already published [1], the luminescent
properties are presented in this work. Also, the amazing antibacterial activity of this
precursor prompted us to investigate the relationship between the crystal structure and
thermal properties, especially if we bear in mind the lack of similar studies in the literature.
Therefore, the mechanism and kinetics of its degradation was investigated under non isothermal conditions in nitrogen and air atmospheres.
Degradation enthalpies, thermodynamic activation parameters, pre-exponential factor, A,
and the apparent activation energy, Ea, were determined for each step using Kissinger’s and
Ozawa’s equations. The complexity of degradation steps has been analyzed using
isoconversional methods. TG/DCS data were collected at four different heating rates: 10, 15,
20 and 25 ºC min
–1
, while the formation of nanosized ZnO was confirmed using XRPD and
FESEM techniques. The influence of precursor on the crystallite size and morphology of the
resulting ZnO along with its antibacterial activity was examined. The obtained results will be
discussed and compared.
[1] L. Radovanović, J. Rogan, D. Poleti, M. Milutinović, M.V. Rodić, Polyhedron 112
(2016) 18.
PB  - Institute of Technical Sciences of SASA, Belgrade, Serbia
C3  - Fifteenth Young Researchers Conference - Materials Science and Engineering, Belgrade, Serbia, book of abstracts
T1  - Decomposition mechanism and kinetics of zinc–isophthalate complex with 2,2’-dipyridylamine as a precursor for obtaining nanosized zinc oxide
SP  - 47
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3109
ER  - 

@conference{
author = "Zdravkovic, Jelena and Radovanovic, Lidija and Simović, Bojana and Poleti, Dejan and Rogan, Jelena and zekovic, ivana and Dramicanin, Miroslav and Mihajlovski, Katarina and Radovanovic, Zeljko",
year = "2016",
abstract = "Studies related to the synthesis of nanosized ZnO as the antibacterial agent have become an
interdisciplinary area gathering chemists, physicists, biologists, and medics. The broad scope
of materials based on ZnO resulted in the development of various techniques for its
preparation. Considering the dependence of particle shape and size onto physical and
chemical properties of ZnO, the synthesis procedure is of major importance.
In this work, an unconventional methodology of synthesis is proposed for obtaining
nanosized ZnO. Polymeric zinc complex containing 2,2’-dipyridylamine (dipya) and dianion
of 1,3-benzenedicarboxylic acid (ipht), [Zn(dipya)(ipht)]n, was used as precursor. Besides
the crystal structure of [Zn(dipya)(ipht)]n which was already published [1], the luminescent
properties are presented in this work. Also, the amazing antibacterial activity of this
precursor prompted us to investigate the relationship between the crystal structure and
thermal properties, especially if we bear in mind the lack of similar studies in the literature.
Therefore, the mechanism and kinetics of its degradation was investigated under non isothermal conditions in nitrogen and air atmospheres.
Degradation enthalpies, thermodynamic activation parameters, pre-exponential factor, A,
and the apparent activation energy, Ea, were determined for each step using Kissinger’s and
Ozawa’s equations. The complexity of degradation steps has been analyzed using
isoconversional methods. TG/DCS data were collected at four different heating rates: 10, 15,
20 and 25 ºC min
–1
, while the formation of nanosized ZnO was confirmed using XRPD and
FESEM techniques. The influence of precursor on the crystallite size and morphology of the
resulting ZnO along with its antibacterial activity was examined. The obtained results will be
discussed and compared.
[1] L. Radovanović, J. Rogan, D. Poleti, M. Milutinović, M.V. Rodić, Polyhedron 112
(2016) 18.",
publisher = "Institute of Technical Sciences of SASA, Belgrade, Serbia",
journal = "Fifteenth Young Researchers Conference - Materials Science and Engineering, Belgrade, Serbia, book of abstracts",
title = "Decomposition mechanism and kinetics of zinc–isophthalate complex with 2,2’-dipyridylamine as a precursor for obtaining nanosized zinc oxide",
pages = "47",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3109"
}

Zdravkovic, J., Radovanovic, L., Simović, B., Poleti, D., Rogan, J., zekovic, i., Dramicanin, M., Mihajlovski, K.,& Radovanovic, Z.. (2016). Decomposition mechanism and kinetics of zinc–isophthalate complex with 2,2’-dipyridylamine as a precursor for obtaining nanosized zinc oxide. in Fifteenth Young Researchers Conference - Materials Science and Engineering, Belgrade, Serbia, book of abstracts
Institute of Technical Sciences of SASA, Belgrade, Serbia., 47.
https://hdl.handle.net/21.15107/rcub_rimsi_3109

Zdravkovic J, Radovanovic L, Simović B, Poleti D, Rogan J, zekovic I, Dramicanin M, Mihajlovski K, Radovanovic Z. Decomposition mechanism and kinetics of zinc–isophthalate complex with 2,2’-dipyridylamine as a precursor for obtaining nanosized zinc oxide. in Fifteenth Young Researchers Conference - Materials Science and Engineering, Belgrade, Serbia, book of abstracts. 2016;:47.
https://hdl.handle.net/21.15107/rcub_rimsi_3109 .

Zdravkovic, Jelena, Radovanovic, Lidija, Simović, Bojana, Poleti, Dejan, Rogan, Jelena, zekovic, ivana, Dramicanin, Miroslav, Mihajlovski, Katarina, Radovanovic, Zeljko, "Decomposition mechanism and kinetics of zinc–isophthalate complex with 2,2’-dipyridylamine as a precursor for obtaining nanosized zinc oxide" in Fifteenth Young Researchers Conference - Materials Science and Engineering, Belgrade, Serbia, book of abstracts (2016):47,
https://hdl.handle.net/21.15107/rcub_rimsi_3109 .

TY  - JOUR
AU  - Jović, Borka M
AU  - Lačnjevac, Uroš
AU  - Jović, Vladimir D
AU  - Gajić-Krstajić, Ljiljana M
AU  - Kovač, Janez
AU  - Poleti, Dejan
AU  - Krstajić, Nedeljko V
PY  - 2016
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/975
AB  - The oxygen evolution reaction (OER) was studied at pure Ni and Ni-(Ebonex/Ir) composite coatings in 1 M NaOH solution at 25 degrees C. Ni-(Ebonex-supported Ir) coatings were electro-deposited from a nickel Watts bath containing different concentrations of suspended Ebonex/Ir particles (0-2 g dm(-3)) onto a Ni 40 mesh substrate. The surface morphology of the coatings was examined by scanning electron microscopy (SEM), the surface composition by energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRPD) and Xray photoelectron spectroscopy (XPS), whereas the electrochemical properties were studied by electrochemical impedance spectroscopy (EIS), polarization measurements and cyclic voltammetry (CV). It was shown that the roughness factor of Ni-(Ebonex/Ir) composite coatings calculated relative to the surface area of the pure Ni sample increased with the increasing content of Ebonex/Ir particles in the bath to a maximum value of 40.6. All samples displayed a Tafel slope of about 60 mV dec(-1) in the potential range corresponding to lower current densities for the OER. The increase of the apparent activity for the OER at Ni-(Ebonex/Ir) coatings compared with the pure Ni coating was attributed only to the increase of the electrochemically active surface area. Although the pure Ni coating initially exhibited higher intrinsic catalytic activity for the OER than the composite coatings, it also showed a drastic loss of activity after subjecting to continuous oxygen evolution at j = 50 mA cm(-2) for 24 h (Delta E = 395 mV). At the same time, the OER overpotential at Ni-(Ebonex/Ir) coatings only negligibly increased after the stability test (Delta E = 22 mV). The improved retention of catalytic activity observed with Ni-(Ebonex/Ir) coatings was ascribed to the presence of IrO2 which inhibited the formation of the inactive gamma-NiOOH phase.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution
EP  - 20514
IS  - 45
SP  - 20502
VL  - 41
DO  - 10.1016/j.ijhydene.2016.08.226
ER  - 

@article{
author = "Jović, Borka M and Lačnjevac, Uroš and Jović, Vladimir D and Gajić-Krstajić, Ljiljana M and Kovač, Janez and Poleti, Dejan and Krstajić, Nedeljko V",
year = "2016",
abstract = "The oxygen evolution reaction (OER) was studied at pure Ni and Ni-(Ebonex/Ir) composite coatings in 1 M NaOH solution at 25 degrees C. Ni-(Ebonex-supported Ir) coatings were electro-deposited from a nickel Watts bath containing different concentrations of suspended Ebonex/Ir particles (0-2 g dm(-3)) onto a Ni 40 mesh substrate. The surface morphology of the coatings was examined by scanning electron microscopy (SEM), the surface composition by energy dispersive X-ray spectroscopy (EDS), X-ray powder diffraction (XRPD) and Xray photoelectron spectroscopy (XPS), whereas the electrochemical properties were studied by electrochemical impedance spectroscopy (EIS), polarization measurements and cyclic voltammetry (CV). It was shown that the roughness factor of Ni-(Ebonex/Ir) composite coatings calculated relative to the surface area of the pure Ni sample increased with the increasing content of Ebonex/Ir particles in the bath to a maximum value of 40.6. All samples displayed a Tafel slope of about 60 mV dec(-1) in the potential range corresponding to lower current densities for the OER. The increase of the apparent activity for the OER at Ni-(Ebonex/Ir) coatings compared with the pure Ni coating was attributed only to the increase of the electrochemically active surface area. Although the pure Ni coating initially exhibited higher intrinsic catalytic activity for the OER than the composite coatings, it also showed a drastic loss of activity after subjecting to continuous oxygen evolution at j = 50 mA cm(-2) for 24 h (Delta E = 395 mV). At the same time, the OER overpotential at Ni-(Ebonex/Ir) coatings only negligibly increased after the stability test (Delta E = 22 mV). The improved retention of catalytic activity observed with Ni-(Ebonex/Ir) coatings was ascribed to the presence of IrO2 which inhibited the formation of the inactive gamma-NiOOH phase.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution",
pages = "20514-20502",
number = "45",
volume = "41",
doi = "10.1016/j.ijhydene.2016.08.226"
}

Jović, B. M., Lačnjevac, U., Jović, V. D., Gajić-Krstajić, L. M., Kovač, J., Poleti, D.,& Krstajić, N. V.. (2016). Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 41(45), 20502-20514.
https://doi.org/10.1016/j.ijhydene.2016.08.226

Jović BM, Lačnjevac U, Jović VD, Gajić-Krstajić LM, Kovač J, Poleti D, Krstajić NV. Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution. in International Journal of Hydrogen Energy. 2016;41(45):20502-20514.
doi:10.1016/j.ijhydene.2016.08.226 .

Jović, Borka M, Lačnjevac, Uroš, Jović, Vladimir D, Gajić-Krstajić, Ljiljana M, Kovač, Janez, Poleti, Dejan, Krstajić, Nedeljko V, "Ni-(Ebonex-supported Ir) composite coatings as electrocatalysts for alkaline water electrolysis. Part II: Oxygen evolution" in International Journal of Hydrogen Energy, 41, no. 45 (2016):20502-20514,
https://doi.org/10.1016/j.ijhydene.2016.08.226 . .

TY  - CONF
AU  - Simović, Bojana
AU  - Poleti, Dejan
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
AU  - Matković, Aleksandar
AU  - Golubović, Aleksandar
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3107
AB  - Zinc oxide is a well-known photocatalyst mainly used to degrade organic water 
pollutants using artificial or sunlight. It is one of the most widely used material because of its 
good photoactivity, biological and chemical stability, wide band gap and low cost [1]. Its 
photocatalytical properties depend on surface area, availability of active sites, pore sizes, 
number and nature of trapped sites, as well as on adsorption/desorption characteristics. On the 
other hand, the modification of semiconductor photocatalysts by noble metals can enhance 
their photocatalytic activity. 
The Zn(CH3COO)2·2H2O with different AgNO3 content (0, 0.75, 1.5, 3 and 6 mole%) 
was solvothermally treated in the presence of poly(vinyl pyrrolidone) as surfactant. The 
obtained samples were rinsed out with distilled water, centrifuged and dried at 105 °C for 3h. 
The specimens were characterized by XRD, FESEM and TEM techniques. The photocatalytic 
activity of the nanocrystalline powders was tested on the Reactive Orange 16 (RO16) textile 
azo dye and compared to the commercial ZnO (the average particle size: 20 nm).
The results showed that Ag modified samples consist of ZnO nanocrystals with
hexagonal wurtzite structure and metallic Ag with face-centered-cubic structure. There is no 
remarkable shift of diffraction peaks of the ZnO, meaning that Zn1-xAgxO1 solid solution is not 
formed and hence the change of unit cell parameters of ZnO nanocrystals is negligible. The 
average crystallite size of all samples was about 20 nm, as determined by XRD analysis from 
Williamson-Hall plots, and confirmed by TEM. The FESEM revealed the uniformity in size 
and approximately spherical shape of the nanoparticles. Ag nanograins were located on the 
surface of ZnO nanoparticles.
It was shown that all synthesized samples have a higher adsorption power and 
photocatalytic activity than the commercial ZnO. Also, Ag modified ZnO powders are more 
efficient than the unmodified one. The samples containing 1.5 and 0.75 mole% of Ag 
respectively, demonstrate the best photocatalytic activity. According to FESEM, this is due to 
the well distributed Ag nanograins over ZnO nanoparticles in the case of these two samples.
[1] B. Simović, A. Golubović, I. Veljković, D. Poleti, J. Zdravković, D. Mijin, A. Bjelajac, J. 
Serb. Chem. Soc. 79 (2014) 1433-1443.
AB  - Cink-oksid je poznati fotokatalizator koji se uglavnom koristi za razgradnju organskih 
zagađujućih suspstanci u vodi uz pomoć veštačke ili sunčeve svetlosti. Zbog svoje dobre 
fotoaktivnosti, biološke i hemijske stabilnosti, široke zabranjenje zone i ekonomičnosti ZnO 
spada u jedan od najčešće korišćenih materijala [1]. Njegova fotokatalitička svojstva zavise od 
specifične površine, dostupnosti aktivnih mesta, veličine pora, broja i prirode blokiranih mesta, 
kao i od karakteristika procesa adsorpcije/desorpcije. S druge strane, modifikovanje 
poluprovodnog fotokatalizatora plemenitim metalima može povećati fotokatalitičku aktivnost.
Zn(CH3COO)2·2H2O sa različitim sadržajem AgNO3 (0; 0,75; 1,5; 3 i 6 mol. %) tretiran 
je solvotermalnim postupkom u prisustvu površinski aktivne materije polivinil pirolidona. 
Dobijeni uzorci ispirani su destilovanom vodom, centrifugirani i sušeni na 105 °C tokom 3 h. 
Uzorci su okarakterisani rendgenskom difrakcijom, „field emission“ skenirajućom 
elektronskom mikroskopijom (FESEM) i transmisionom elektronskom mikroskopijom (TEM). 
Fotokatalitička aktivnost dobijenih nanokristalnih prahova ispitana je na tekstilnoj azo-boji 
Reactive Orange 16 (RO16) i upoređena je sa kupovnim ZnO (srednja veličina čestica: 20 nm).
Rezultati su pokazali da se uzorci modifikovani sa Ag sastoje od ZnO nanokristala sa 
heksagonalnom vircitnom strukturom i metalnog Ag sa pljosno centriranom teseralnom 
strukturom. Nije uočeno značajnije pomeranje difrakcionih pikova ZnO, a samim tim ni 
promena parametara jedinične ćelije, što znači da nije nastao čvrsti rastvor Zn1-xAgxO1. Srednja 
veličina kristalita kod svih uzoraka bila je oko 20 nm, što je određeno renedgenskom 
difrakcijom na nanokristalnim uzorcima pomoću Vilijamson-Holove metode i potvrđeno 
TEM-om. FESEM je ukazao na uniformnost veličine i na približno sferni oblik nanočestica. 
Nanozrna Ag nalaze se na površini nanočestica ZnO.
Svi sintetisani uzorci imaju veću adsorpcionu moć i fotokatalitičku aktivnost u odnosu 
na kupovni ZnO. Takođe, prahovi ZnO modifikovani sa Ag efikasniji su nego nemodifikovan 
ZnO. Uzorci sa 1,5 i 0,75 mol. % Ag pokazuju najbolju fotokatalitičku aktivnost, a razlog je 
fina raspodela nanozrna Ag na nanočesticama ZnO, što se može uočiti na FESEM-u za ova dva 
uzorka. 
[1] B. Simović, A. Golubović, I. Veljković, D. Poleti, J. Zdravković, D. Mijin, A. Bjelajac, J. 
Serb. Chem. Soc. 79 (2014) 1433-1443.
PB  - Српско кристалографско друштво, Београд, Serbian Crystallographic Society, Belgrade, Serbia
C3  - 22nd Conference of the Serbian Crystallographic Society, Smederevo, Serbia, Abstracts
T1  - Enhanced photocatalytic activity of Ag modified ZnO nanopowders prepared by solvothermal method
T1  - POBOLJŠANA FOTOKATALITIČKA AKTIVNOST SREBROM  MODIFIKOVANIH ZnO NANOPRAHOVA DOBIJENIH SOLVOTERMALNIM POSTUPKOM
EP  - 32
SP  - 31
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3107
ER  - 

@conference{
author = "Simović, Bojana and Poleti, Dejan and Dapčević, Aleksandra and Branković, Goran and Matković, Aleksandar and Golubović, Aleksandar",
year = "2015",
abstract = "Zinc oxide is a well-known photocatalyst mainly used to degrade organic water 
pollutants using artificial or sunlight. It is one of the most widely used material because of its 
good photoactivity, biological and chemical stability, wide band gap and low cost [1]. Its 
photocatalytical properties depend on surface area, availability of active sites, pore sizes, 
number and nature of trapped sites, as well as on adsorption/desorption characteristics. On the 
other hand, the modification of semiconductor photocatalysts by noble metals can enhance 
their photocatalytic activity. 
The Zn(CH3COO)2·2H2O with different AgNO3 content (0, 0.75, 1.5, 3 and 6 mole%) 
was solvothermally treated in the presence of poly(vinyl pyrrolidone) as surfactant. The 
obtained samples were rinsed out with distilled water, centrifuged and dried at 105 °C for 3h. 
The specimens were characterized by XRD, FESEM and TEM techniques. The photocatalytic 
activity of the nanocrystalline powders was tested on the Reactive Orange 16 (RO16) textile 
azo dye and compared to the commercial ZnO (the average particle size: 20 nm).
The results showed that Ag modified samples consist of ZnO nanocrystals with
hexagonal wurtzite structure and metallic Ag with face-centered-cubic structure. There is no 
remarkable shift of diffraction peaks of the ZnO, meaning that Zn1-xAgxO1 solid solution is not 
formed and hence the change of unit cell parameters of ZnO nanocrystals is negligible. The 
average crystallite size of all samples was about 20 nm, as determined by XRD analysis from 
Williamson-Hall plots, and confirmed by TEM. The FESEM revealed the uniformity in size 
and approximately spherical shape of the nanoparticles. Ag nanograins were located on the 
surface of ZnO nanoparticles.
It was shown that all synthesized samples have a higher adsorption power and 
photocatalytic activity than the commercial ZnO. Also, Ag modified ZnO powders are more 
efficient than the unmodified one. The samples containing 1.5 and 0.75 mole% of Ag 
respectively, demonstrate the best photocatalytic activity. According to FESEM, this is due to 
the well distributed Ag nanograins over ZnO nanoparticles in the case of these two samples.
[1] B. Simović, A. Golubović, I. Veljković, D. Poleti, J. Zdravković, D. Mijin, A. Bjelajac, J. 
Serb. Chem. Soc. 79 (2014) 1433-1443., Cink-oksid je poznati fotokatalizator koji se uglavnom koristi za razgradnju organskih 
zagađujućih suspstanci u vodi uz pomoć veštačke ili sunčeve svetlosti. Zbog svoje dobre 
fotoaktivnosti, biološke i hemijske stabilnosti, široke zabranjenje zone i ekonomičnosti ZnO 
spada u jedan od najčešće korišćenih materijala [1]. Njegova fotokatalitička svojstva zavise od 
specifične površine, dostupnosti aktivnih mesta, veličine pora, broja i prirode blokiranih mesta, 
kao i od karakteristika procesa adsorpcije/desorpcije. S druge strane, modifikovanje 
poluprovodnog fotokatalizatora plemenitim metalima može povećati fotokatalitičku aktivnost.
Zn(CH3COO)2·2H2O sa različitim sadržajem AgNO3 (0; 0,75; 1,5; 3 i 6 mol. %) tretiran 
je solvotermalnim postupkom u prisustvu površinski aktivne materije polivinil pirolidona. 
Dobijeni uzorci ispirani su destilovanom vodom, centrifugirani i sušeni na 105 °C tokom 3 h. 
Uzorci su okarakterisani rendgenskom difrakcijom, „field emission“ skenirajućom 
elektronskom mikroskopijom (FESEM) i transmisionom elektronskom mikroskopijom (TEM). 
Fotokatalitička aktivnost dobijenih nanokristalnih prahova ispitana je na tekstilnoj azo-boji 
Reactive Orange 16 (RO16) i upoređena je sa kupovnim ZnO (srednja veličina čestica: 20 nm).
Rezultati su pokazali da se uzorci modifikovani sa Ag sastoje od ZnO nanokristala sa 
heksagonalnom vircitnom strukturom i metalnog Ag sa pljosno centriranom teseralnom 
strukturom. Nije uočeno značajnije pomeranje difrakcionih pikova ZnO, a samim tim ni 
promena parametara jedinične ćelije, što znači da nije nastao čvrsti rastvor Zn1-xAgxO1. Srednja 
veličina kristalita kod svih uzoraka bila je oko 20 nm, što je određeno renedgenskom 
difrakcijom na nanokristalnim uzorcima pomoću Vilijamson-Holove metode i potvrđeno 
TEM-om. FESEM je ukazao na uniformnost veličine i na približno sferni oblik nanočestica. 
Nanozrna Ag nalaze se na površini nanočestica ZnO.
Svi sintetisani uzorci imaju veću adsorpcionu moć i fotokatalitičku aktivnost u odnosu 
na kupovni ZnO. Takođe, prahovi ZnO modifikovani sa Ag efikasniji su nego nemodifikovan 
ZnO. Uzorci sa 1,5 i 0,75 mol. % Ag pokazuju najbolju fotokatalitičku aktivnost, a razlog je 
fina raspodela nanozrna Ag na nanočesticama ZnO, što se može uočiti na FESEM-u za ova dva 
uzorka. 
[1] B. Simović, A. Golubović, I. Veljković, D. Poleti, J. Zdravković, D. Mijin, A. Bjelajac, J. 
Serb. Chem. Soc. 79 (2014) 1433-1443.",
publisher = "Српско кристалографско друштво, Београд, Serbian Crystallographic Society, Belgrade, Serbia",
journal = "22nd Conference of the Serbian Crystallographic Society, Smederevo, Serbia, Abstracts",
title = "Enhanced photocatalytic activity of Ag modified ZnO nanopowders prepared by solvothermal method, POBOLJŠANA FOTOKATALITIČKA AKTIVNOST SREBROM  MODIFIKOVANIH ZnO NANOPRAHOVA DOBIJENIH SOLVOTERMALNIM POSTUPKOM",
pages = "32-31",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3107"
}

Simović, B., Poleti, D., Dapčević, A., Branković, G., Matković, A.,& Golubović, A.. (2015). Enhanced photocatalytic activity of Ag modified ZnO nanopowders prepared by solvothermal method. in 22nd Conference of the Serbian Crystallographic Society, Smederevo, Serbia, Abstracts
Српско кристалографско друштво, Београд, Serbian Crystallographic Society, Belgrade, Serbia., 31-32.
https://hdl.handle.net/21.15107/rcub_rimsi_3107

Simović B, Poleti D, Dapčević A, Branković G, Matković A, Golubović A. Enhanced photocatalytic activity of Ag modified ZnO nanopowders prepared by solvothermal method. in 22nd Conference of the Serbian Crystallographic Society, Smederevo, Serbia, Abstracts. 2015;:31-32.
https://hdl.handle.net/21.15107/rcub_rimsi_3107 .

Simović, Bojana, Poleti, Dejan, Dapčević, Aleksandra, Branković, Goran, Matković, Aleksandar, Golubović, Aleksandar, "Enhanced photocatalytic activity of Ag modified ZnO nanopowders prepared by solvothermal method" in 22nd Conference of the Serbian Crystallographic Society, Smederevo, Serbia, Abstracts (2015):31-32,
https://hdl.handle.net/21.15107/rcub_rimsi_3107 .

TY  - CONF
AU  - Simović, Bojana
AU  - Poleti, Dejan
AU  - Kovač, Sabina
AU  - Bjelajac, Andjelika
AU  - Dapčević, Aleksandra
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3093
AB  - The environmental friendly materials based on titanium oxides are often chosen
for the industrial application due to their extraordinary characteristics (biological
and chemical stability, good photocatalitic activity, wide band gap and costeffectiveness). On the other hand, the hydrothermal process in alkaline solutions
became a very important treatment in the production of titania and titanate
nanostructures. The aim of this work was to investigate how different conditions of
hydrothermal treatment could modify the structural, microstructural and
photocatalytic properties of starting nanoanatase.
Nanoanatase powder was hydrothermally treated with NaOH solution (c =
5 mol/dm) at different temperatures (T = 110, 135 and 160 °C) and durations (t = 6,
12 and 18 h). The obtained samples were washed out with distilled water,
centrifuged and dried. Nine specimens are prepared and labeled as AT–t
, where T is
temperature of the treatment and t is duration of the treatment. The nanocrystalline
samples were characterized by XRD, TEM/SAED and FESEM techniques. The
photocatalytic activity was tested on the Reactive Orange 16 (RO16) textile azo dye.
The XRD analysis showed that the hydrothermal treatment caused the formation
of a secondary phase (H2Ti2O5·H2O, PDF 47–0124) besides anatase. This is due to
the reaction between anatase and NaOH. The increase of temperature and/or time
increases the amount of secondary phase. For example, the specimen A110–6 contains
about 12 wt.% of H2Ti2O5·H2O, while the content of this phase amounts about
37 wt.% in A135–12. The average crystallite size of all samples was smaller than 20
nm. This was comfirmed by TEM. The FESEM revealed soft agglomerates created
from nanoparticles.
The photocatalytic experiments showed that the presence of secondary phase
decreases the photocatalytic activity. For example, A110–6 decolorized 35 % of the
RO16 dye within 90 minutes, while A135–12 degraded only 15% of the same dye in
the same time interval.
PB  - Institut za multidisciplinarna istraživanja, Belgrade, Serbia
C3  - 3rd Conference of the Serbian Society for Ceramic Materials, Belgrade, Serbia, Programme and the Book of Abstracts
T1  - Photocatalytic degradation of textile dye with hydrothermally modified nanoanatase
SP  - 82
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3093
ER  - 

@conference{
author = "Simović, Bojana and Poleti, Dejan and Kovač, Sabina and Bjelajac, Andjelika and Dapčević, Aleksandra and Branković, Goran",
year = "2015",
abstract = "The environmental friendly materials based on titanium oxides are often chosen
for the industrial application due to their extraordinary characteristics (biological
and chemical stability, good photocatalitic activity, wide band gap and costeffectiveness). On the other hand, the hydrothermal process in alkaline solutions
became a very important treatment in the production of titania and titanate
nanostructures. The aim of this work was to investigate how different conditions of
hydrothermal treatment could modify the structural, microstructural and
photocatalytic properties of starting nanoanatase.
Nanoanatase powder was hydrothermally treated with NaOH solution (c =
5 mol/dm) at different temperatures (T = 110, 135 and 160 °C) and durations (t = 6,
12 and 18 h). The obtained samples were washed out with distilled water,
centrifuged and dried. Nine specimens are prepared and labeled as AT–t
, where T is
temperature of the treatment and t is duration of the treatment. The nanocrystalline
samples were characterized by XRD, TEM/SAED and FESEM techniques. The
photocatalytic activity was tested on the Reactive Orange 16 (RO16) textile azo dye.
The XRD analysis showed that the hydrothermal treatment caused the formation
of a secondary phase (H2Ti2O5·H2O, PDF 47–0124) besides anatase. This is due to
the reaction between anatase and NaOH. The increase of temperature and/or time
increases the amount of secondary phase. For example, the specimen A110–6 contains
about 12 wt.% of H2Ti2O5·H2O, while the content of this phase amounts about
37 wt.% in A135–12. The average crystallite size of all samples was smaller than 20
nm. This was comfirmed by TEM. The FESEM revealed soft agglomerates created
from nanoparticles.
The photocatalytic experiments showed that the presence of secondary phase
decreases the photocatalytic activity. For example, A110–6 decolorized 35 % of the
RO16 dye within 90 minutes, while A135–12 degraded only 15% of the same dye in
the same time interval.",
publisher = "Institut za multidisciplinarna istraživanja, Belgrade, Serbia",
journal = "3rd Conference of the Serbian Society for Ceramic Materials, Belgrade, Serbia, Programme and the Book of Abstracts",
title = "Photocatalytic degradation of textile dye with hydrothermally modified nanoanatase",
pages = "82",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3093"
}

Simović, B., Poleti, D., Kovač, S., Bjelajac, A., Dapčević, A.,& Branković, G.. (2015). Photocatalytic degradation of textile dye with hydrothermally modified nanoanatase. in 3rd Conference of the Serbian Society for Ceramic Materials, Belgrade, Serbia, Programme and the Book of Abstracts
Institut za multidisciplinarna istraživanja, Belgrade, Serbia., 82.
https://hdl.handle.net/21.15107/rcub_rimsi_3093

Simović B, Poleti D, Kovač S, Bjelajac A, Dapčević A, Branković G. Photocatalytic degradation of textile dye with hydrothermally modified nanoanatase. in 3rd Conference of the Serbian Society for Ceramic Materials, Belgrade, Serbia, Programme and the Book of Abstracts. 2015;:82.
https://hdl.handle.net/21.15107/rcub_rimsi_3093 .

Simović, Bojana, Poleti, Dejan, Kovač, Sabina, Bjelajac, Andjelika, Dapčević, Aleksandra, Branković, Goran, "Photocatalytic degradation of textile dye with hydrothermally modified nanoanatase" in 3rd Conference of the Serbian Society for Ceramic Materials, Belgrade, Serbia, Programme and the Book of Abstracts (2015):82,
https://hdl.handle.net/21.15107/rcub_rimsi_3093 .

TY  - JOUR
AU  - Vuković, Marina
AU  - Branković, Goran
AU  - Marinković Stanojević, Zorica
AU  - Poleti, Dejan
AU  - Branković, Zorica
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/874
AB  - Previously synthesized nanocrystalline ZnO doped with cobalt and manganese, Bi2O3 and Sb2O3 were the precursors for high voltage varistors preparation. Varistor ceramics were sintered at 750 degrees C, 770 degrees C or 900 degrees C for 1 h. An amount of 30 mass% of secondary phases and sintering temperature of 770 degrees C were found to be optimal for obtaining varistor with prominent properties. Achieved density was 97% of the theoretical value. Post-sintering phase composition included ZnO, gamma-Bi2O3 and pyrochlore-type with Zn2Bi3Sb3O14 nominal formula. Fine grained microstructure was accompanied with good phase distribution and excellent electrical characteristics: extraordinary high breakdown field of 3200 V mm(-1), high nonlinearity coefficients of 71 and 51 in 0.1-1 and 1-10 mA cm(-2) current density ranges, respectively, and low leakage current of 7.7 mu A cm(-2).
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors
EP  - 1814
IS  - 6
SP  - 1807
VL  - 35
DO  - 10.1016/j.jeurceramsoc.2014.12.015
ER  - 

@article{
author = "Vuković, Marina and Branković, Goran and Marinković Stanojević, Zorica and Poleti, Dejan and Branković, Zorica",
year = "2015",
abstract = "Previously synthesized nanocrystalline ZnO doped with cobalt and manganese, Bi2O3 and Sb2O3 were the precursors for high voltage varistors preparation. Varistor ceramics were sintered at 750 degrees C, 770 degrees C or 900 degrees C for 1 h. An amount of 30 mass% of secondary phases and sintering temperature of 770 degrees C were found to be optimal for obtaining varistor with prominent properties. Achieved density was 97% of the theoretical value. Post-sintering phase composition included ZnO, gamma-Bi2O3 and pyrochlore-type with Zn2Bi3Sb3O14 nominal formula. Fine grained microstructure was accompanied with good phase distribution and excellent electrical characteristics: extraordinary high breakdown field of 3200 V mm(-1), high nonlinearity coefficients of 71 and 51 in 0.1-1 and 1-10 mA cm(-2) current density ranges, respectively, and low leakage current of 7.7 mu A cm(-2).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors",
pages = "1814-1807",
number = "6",
volume = "35",
doi = "10.1016/j.jeurceramsoc.2014.12.015"
}

Vuković, M., Branković, G., Marinković Stanojević, Z., Poleti, D.,& Branković, Z.. (2015). Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 35(6), 1807-1814.
https://doi.org/10.1016/j.jeurceramsoc.2014.12.015

Vuković M, Branković G, Marinković Stanojević Z, Poleti D, Branković Z. Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors. in Journal of the European Ceramic Society. 2015;35(6):1807-1814.
doi:10.1016/j.jeurceramsoc.2014.12.015 .

Vuković, Marina, Branković, Goran, Marinković Stanojević, Zorica, Poleti, Dejan, Branković, Zorica, "Ultra-high breakdown field varistors prepared from individually synthesized nanoprecursors" in Journal of the European Ceramic Society, 35, no. 6 (2015):1807-1814,
https://doi.org/10.1016/j.jeurceramsoc.2014.12.015 . .

TY  - JOUR
AU  - Zdravković, Jelena
AU  - Simović, Bojana
AU  - Golubović, Aleksandar
AU  - Poleti, Dejan
AU  - Veljković, Ivana
AU  - Šćepanović, Maja
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/831
AB  - The effects of common precursors used in the synthesis of CeO2 nanopowders were investigated, and the structural and spectral properties of the resulting products were compared. Two cerium (III) salts, i.e., Ce(NO3)(3)center dot 6H(2)O and CeCl3 center dot 7H(2)O, and two cerium (IV) salts, i.e., Ce (SO4)(2)center dot 4H(2)O and (NH4)(2)Ce(NO3)(6) were applied. The proposed procedures for the CeO2 preparations were realizdd using the same hydrothermal treatment conditions. The products were characterized using X-ray powder diffraction (XRD) and thermogravimetric (TG) analysis, and the morphology was determined using scanning (SEM) and transmission electron microscopy (TEM). The spectral properties of the obtained nanopowders were characterized by FT-IR, Raman scattering and UV-vis spectroscopy. The results revealed the influence of the precursors on the crystallinity, crystallite size, band gap energy, morphology and purity of the synthesized samples.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Comparative study of CeO2 nanopowders obtained by the hydrothermal method from various precursors
EP  - 1979
IS  - 2
SP  - 1970
VL  - 41
DO  - 10.1016/j.ceramint.2014.08.122
ER  - 

@article{
author = "Zdravković, Jelena and Simović, Bojana and Golubović, Aleksandar and Poleti, Dejan and Veljković, Ivana and Šćepanović, Maja and Branković, Goran",
year = "2015",
abstract = "The effects of common precursors used in the synthesis of CeO2 nanopowders were investigated, and the structural and spectral properties of the resulting products were compared. Two cerium (III) salts, i.e., Ce(NO3)(3)center dot 6H(2)O and CeCl3 center dot 7H(2)O, and two cerium (IV) salts, i.e., Ce (SO4)(2)center dot 4H(2)O and (NH4)(2)Ce(NO3)(6) were applied. The proposed procedures for the CeO2 preparations were realizdd using the same hydrothermal treatment conditions. The products were characterized using X-ray powder diffraction (XRD) and thermogravimetric (TG) analysis, and the morphology was determined using scanning (SEM) and transmission electron microscopy (TEM). The spectral properties of the obtained nanopowders were characterized by FT-IR, Raman scattering and UV-vis spectroscopy. The results revealed the influence of the precursors on the crystallinity, crystallite size, band gap energy, morphology and purity of the synthesized samples.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Comparative study of CeO2 nanopowders obtained by the hydrothermal method from various precursors",
pages = "1979-1970",
number = "2",
volume = "41",
doi = "10.1016/j.ceramint.2014.08.122"
}

Zdravković, J., Simović, B., Golubović, A., Poleti, D., Veljković, I., Šćepanović, M.,& Branković, G.. (2015). Comparative study of CeO2 nanopowders obtained by the hydrothermal method from various precursors. in Ceramics International
Elsevier Sci Ltd, Oxford., 41(2), 1970-1979.
https://doi.org/10.1016/j.ceramint.2014.08.122

Zdravković J, Simović B, Golubović A, Poleti D, Veljković I, Šćepanović M, Branković G. Comparative study of CeO2 nanopowders obtained by the hydrothermal method from various precursors. in Ceramics International. 2015;41(2):1970-1979.
doi:10.1016/j.ceramint.2014.08.122 .

Zdravković, Jelena, Simović, Bojana, Golubović, Aleksandar, Poleti, Dejan, Veljković, Ivana, Šćepanović, Maja, Branković, Goran, "Comparative study of CeO2 nanopowders obtained by the hydrothermal method from various precursors" in Ceramics International, 41, no. 2 (2015):1970-1979,
https://doi.org/10.1016/j.ceramint.2014.08.122 . .

TY  - JOUR
AU  - Dapčević, Aleksandra
AU  - Poleti, Dejan
AU  - Rogan, Jelena
AU  - Radojković, Aleksandar
AU  - Radović, M.
AU  - Branković, Goran
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/840
AB  - The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.
PB  - Elsevier Science Bv, Amsterdam
T2  - Solid State Ionics
T1  - A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity
EP  - 23
SP  - 18
VL  - 280
DO  - 10.1016/j.ssi.2015.08.004
ER  - 

@article{
author = "Dapčević, Aleksandra and Poleti, Dejan and Rogan, Jelena and Radojković, Aleksandar and Radović, M. and Branković, Goran",
year = "2015",
abstract = "The possibility to stabilize the delta-Bi2O3-type polymorph with high ionic conductivity by doping with Tm2O3 was investigated in this study. Five microaystalline samples were synthesized at 750 degrees C from alpha-Bi2O3 and Tm2O3 mixtures with compositions (Bi1-xTmx)(2)O-3, where x = 0.04, 0.08, 0.11, 0.14 and 0.20. The XRD, SEM, HRTEM and SAED results showed that the targeted delta-Bi2O3-type single-phase (space group Fm (3) over barm) was formed for 0.11  lt = x  lt = 0.20. The unit cell parameter of delta-Bi2O3-type phase decreases with increase in Tm content. According to DTA, no phase transitions were observed in the sample with x = 020, indicating that the obtained delta-Bi2O3-type phase is structurally stable from room temperature to 985 degrees C. Based on EIS, (Bi0.80Tm0.20)(2)O-3 exhibits high conductivity (0.117 S cm(-1) at 550 degrees C) with activation energies: 0.38(4) eV above 550 degrees C and 127(2) eV below 550 degrees C, due to the change in charge carrier mobility. The effect of thermal aging was investigated and discussed.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Solid State Ionics",
title = "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity",
pages = "23-18",
volume = "280",
doi = "10.1016/j.ssi.2015.08.004"
}

Dapčević, A., Poleti, D., Rogan, J., Radojković, A., Radović, M.,& Branković, G.. (2015). A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics
Elsevier Science Bv, Amsterdam., 280, 18-23.
https://doi.org/10.1016/j.ssi.2015.08.004

Dapčević A, Poleti D, Rogan J, Radojković A, Radović M, Branković G. A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity. in Solid State Ionics. 2015;280:18-23.
doi:10.1016/j.ssi.2015.08.004 .

Dapčević, Aleksandra, Poleti, Dejan, Rogan, Jelena, Radojković, Aleksandar, Radović, M., Branković, Goran, "A new electrolyte based on Tm3+-doped delta-Bi2O3-type phase with enhanced conductivity" in Solid State Ionics, 280 (2015):18-23,
https://doi.org/10.1016/j.ssi.2015.08.004 . .

TY  - JOUR
AU  - Simović, Bojana
AU  - Golubović, Aleksandar
AU  - Veljković, Ivana
AU  - Poleti, Dejan
AU  - Zdravković, Jelena
AU  - Mijin, Dušan
AU  - Bjelajac, Anđelika
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/807
AB  - In this work, zinc oxide powders were obtained by two different techniques: hydro- and solvothermal synthesis starting from Zn(NO3)(2) and Zn(CH3COO)(2), respectively. The influence of synthetic procedure on the structural, microstructural, thermal and photocatalytic properties of the prepared ZnO powders was investigated. Both ZnO samples were further annealed under moderate conditions (300 degrees C) to avoid grain growth and to remove traces of impurities. In all four cases, single-phase hexagonal ZnO was confirmed by X-ray powder diffraction. The morphologies of prepared ZnO powders were different and they varied from rounded nanograins to microrods. All prepared samples showed higher photocatalytic efficiency in the degradation of the textile azo dye Reactive Orange 16 (RO16) than commercial ZnO. In addition, the non-annealed samples had better photocatalytic properties than the commercial Degussa P25 TiO2 powder.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye
EP  - 1443
IS  - 11
SP  - 1433
VL  - 79
DO  - 10.2298/JSC140520077S
ER  - 

@article{
author = "Simović, Bojana and Golubović, Aleksandar and Veljković, Ivana and Poleti, Dejan and Zdravković, Jelena and Mijin, Dušan and Bjelajac, Anđelika",
year = "2014",
abstract = "In this work, zinc oxide powders were obtained by two different techniques: hydro- and solvothermal synthesis starting from Zn(NO3)(2) and Zn(CH3COO)(2), respectively. The influence of synthetic procedure on the structural, microstructural, thermal and photocatalytic properties of the prepared ZnO powders was investigated. Both ZnO samples were further annealed under moderate conditions (300 degrees C) to avoid grain growth and to remove traces of impurities. In all four cases, single-phase hexagonal ZnO was confirmed by X-ray powder diffraction. The morphologies of prepared ZnO powders were different and they varied from rounded nanograins to microrods. All prepared samples showed higher photocatalytic efficiency in the degradation of the textile azo dye Reactive Orange 16 (RO16) than commercial ZnO. In addition, the non-annealed samples had better photocatalytic properties than the commercial Degussa P25 TiO2 powder.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye",
pages = "1443-1433",
number = "11",
volume = "79",
doi = "10.2298/JSC140520077S"
}

Simović, B., Golubović, A., Veljković, I., Poleti, D., Zdravković, J., Mijin, D.,& Bjelajac, A.. (2014). Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(11), 1433-1443.
https://doi.org/10.2298/JSC140520077S

Simović B, Golubović A, Veljković I, Poleti D, Zdravković J, Mijin D, Bjelajac A. Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye. in Journal of the Serbian Chemical Society. 2014;79(11):1433-1443.
doi:10.2298/JSC140520077S .

Simović, Bojana, Golubović, Aleksandar, Veljković, Ivana, Poleti, Dejan, Zdravković, Jelena, Mijin, Dušan, Bjelajac, Anđelika, "Hydro- and solvothermally-prepared ZnO and its catalytic effect on the photodegradation of Reactive Orange 16 dye" in Journal of the Serbian Chemical Society, 79, no. 11 (2014):1433-1443,
https://doi.org/10.2298/JSC140520077S . .

TY  - JOUR
AU  - Tasić, Nikola
AU  - Rogan, Jelena
AU  - Poleti, Dejan
AU  - Radovanović, Lidija
AU  - Branković, Goran
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/801
AB  - Four novel polymeric iron(III) complexes with 2,2'-bipyridine (bipy) and different aromatic polycarboxylato ligands as anions of phthalic (pht), isophthalic (ipht), terephthalic (tpht) and pyromellitic (pyr) acid were synthesized by ligand exchange reaction. The complexes were characterized by elemental and TG/DSC analysis, FTIR and diffuse reflectance UV-Vis-NIR spectroscopy and magnetic susceptibility measurements. Based on the analytical and spectral data, the formulae of the complexes were {[Fe-4(bipy)(2) (H2O)(2)(OH)(6)(pht)(3)]center dot 2H(2)O}(n) (1), {[Fe-4(bipy)(2)(Hipht)(2)(ipht)(2)(OH)(6)]center dot 4H(2)O}(n) (2), {[Fe-4(bipy)(2)(Htpht)(2)(OH)(6)(tpht)(2)]center dot 4H(2)O}(n) (3) and {[Fe-4(bipy)(H2O)(8)-(OH)(4)(pyr)(2)]center dot H2O}(n) (4). All complexes were red brown and low-spin with a distorted octahedral geometry with FeO6 or FeN2O4 chromophores. The polycarboxylato ligands played a bridging role in all cases, whereas monodentate COO groups were present in 2 and 3, while bridging and chelate COO groups were established in 1 and 4. The thermal behaviours of 1-4 were investigated in detail and the molar dehydration enthalpies were calculated. According to the all those results, the structural formulae of complexes 1-4 were proposed.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Synthesis and characterization of mu-hydroxido- and mu-polycarboxylato-bridged iron(III) complexes with 2,2 '-bipyridine
EP  - 952
IS  - 8
SP  - 941
VL  - 79
DO  - 10.2298/JSC131028005T
ER  - 

@article{
author = "Tasić, Nikola and Rogan, Jelena and Poleti, Dejan and Radovanović, Lidija and Branković, Goran",
year = "2014",
abstract = "Four novel polymeric iron(III) complexes with 2,2'-bipyridine (bipy) and different aromatic polycarboxylato ligands as anions of phthalic (pht), isophthalic (ipht), terephthalic (tpht) and pyromellitic (pyr) acid were synthesized by ligand exchange reaction. The complexes were characterized by elemental and TG/DSC analysis, FTIR and diffuse reflectance UV-Vis-NIR spectroscopy and magnetic susceptibility measurements. Based on the analytical and spectral data, the formulae of the complexes were {[Fe-4(bipy)(2) (H2O)(2)(OH)(6)(pht)(3)]center dot 2H(2)O}(n) (1), {[Fe-4(bipy)(2)(Hipht)(2)(ipht)(2)(OH)(6)]center dot 4H(2)O}(n) (2), {[Fe-4(bipy)(2)(Htpht)(2)(OH)(6)(tpht)(2)]center dot 4H(2)O}(n) (3) and {[Fe-4(bipy)(H2O)(8)-(OH)(4)(pyr)(2)]center dot H2O}(n) (4). All complexes were red brown and low-spin with a distorted octahedral geometry with FeO6 or FeN2O4 chromophores. The polycarboxylato ligands played a bridging role in all cases, whereas monodentate COO groups were present in 2 and 3, while bridging and chelate COO groups were established in 1 and 4. The thermal behaviours of 1-4 were investigated in detail and the molar dehydration enthalpies were calculated. According to the all those results, the structural formulae of complexes 1-4 were proposed.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Synthesis and characterization of mu-hydroxido- and mu-polycarboxylato-bridged iron(III) complexes with 2,2 '-bipyridine",
pages = "952-941",
number = "8",
volume = "79",
doi = "10.2298/JSC131028005T"
}

Tasić, N., Rogan, J., Poleti, D., Radovanović, L.,& Branković, G.. (2014). Synthesis and characterization of mu-hydroxido- and mu-polycarboxylato-bridged iron(III) complexes with 2,2 '-bipyridine. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 79(8), 941-952.
https://doi.org/10.2298/JSC131028005T

Tasić N, Rogan J, Poleti D, Radovanović L, Branković G. Synthesis and characterization of mu-hydroxido- and mu-polycarboxylato-bridged iron(III) complexes with 2,2 '-bipyridine. in Journal of the Serbian Chemical Society. 2014;79(8):941-952.
doi:10.2298/JSC131028005T .

Tasić, Nikola, Rogan, Jelena, Poleti, Dejan, Radovanović, Lidija, Branković, Goran, "Synthesis and characterization of mu-hydroxido- and mu-polycarboxylato-bridged iron(III) complexes with 2,2 '-bipyridine" in Journal of the Serbian Chemical Society, 79, no. 8 (2014):941-952,
https://doi.org/10.2298/JSC131028005T . .

TY  - JOUR
AU  - Vuković, Marina
AU  - Branković, Zorica
AU  - Poleti, Dejan
AU  - Recnik, Aleksander
AU  - Branković, Goran
PY  - 2014
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/782
AB  - Several methods with solid and dissolved reactants were investigated as possible routes for synthesis of single-phase valentinite Sb2O3. The methods are based on simple chemical reaction between SbCl3 and NaOH. The method with solid state reactants was established on self-propagating room temperature reaction (SPRT), while wet syntheses were based on the same chemical reaction, and performed in either distilled water or absolute ethanol. The prepared powders were characterized by X-ray powder diffraction, scanning electron microscopy and field emission scanning electron microscopy, high-resolution transmission electron microscopy, selected area electron diffraction (SAED) and UV/vis diffuse reflectance spectroscopy. SPRT and aqueous solution syntheses resulted in single-phase valentinite Sb2O3, but with significantly different morphologies. In the case of SPRT method the obtained powder contains well crystallized prismatic shaped submicronic particles, with hexagonal or lozenge basis typical for valentinite crystal structure, while aqueous solution synthesis resulted in powder containing micronic agglomerates. The ethanolic solution synthesis product was Sb2O3 with cubic senarmontite as predominant phase and traces of orthorhombic valentinite. It was confirmed that not only the aggregate state, but also the choice of solvent has a great influence on the structural and optical characteristics of synthesized Sb2O3 powders.
PB  - Springer, Dordrecht
T2  - Journal of Sol-Gel Science and Technology
T1  - Novel simple methods for the synthesis of single-phase valentinite Sb2O3
EP  - 533
IS  - 3
SP  - 527
VL  - 72
DO  - 10.1007/s10971-014-3469-3
ER  - 

@article{
author = "Vuković, Marina and Branković, Zorica and Poleti, Dejan and Recnik, Aleksander and Branković, Goran",
year = "2014",
abstract = "Several methods with solid and dissolved reactants were investigated as possible routes for synthesis of single-phase valentinite Sb2O3. The methods are based on simple chemical reaction between SbCl3 and NaOH. The method with solid state reactants was established on self-propagating room temperature reaction (SPRT), while wet syntheses were based on the same chemical reaction, and performed in either distilled water or absolute ethanol. The prepared powders were characterized by X-ray powder diffraction, scanning electron microscopy and field emission scanning electron microscopy, high-resolution transmission electron microscopy, selected area electron diffraction (SAED) and UV/vis diffuse reflectance spectroscopy. SPRT and aqueous solution syntheses resulted in single-phase valentinite Sb2O3, but with significantly different morphologies. In the case of SPRT method the obtained powder contains well crystallized prismatic shaped submicronic particles, with hexagonal or lozenge basis typical for valentinite crystal structure, while aqueous solution synthesis resulted in powder containing micronic agglomerates. The ethanolic solution synthesis product was Sb2O3 with cubic senarmontite as predominant phase and traces of orthorhombic valentinite. It was confirmed that not only the aggregate state, but also the choice of solvent has a great influence on the structural and optical characteristics of synthesized Sb2O3 powders.",
publisher = "Springer, Dordrecht",
journal = "Journal of Sol-Gel Science and Technology",
title = "Novel simple methods for the synthesis of single-phase valentinite Sb2O3",
pages = "533-527",
number = "3",
volume = "72",
doi = "10.1007/s10971-014-3469-3"
}

Vuković, M., Branković, Z., Poleti, D., Recnik, A.,& Branković, G.. (2014). Novel simple methods for the synthesis of single-phase valentinite Sb2O3. in Journal of Sol-Gel Science and Technology
Springer, Dordrecht., 72(3), 527-533.
https://doi.org/10.1007/s10971-014-3469-3

Vuković M, Branković Z, Poleti D, Recnik A, Branković G. Novel simple methods for the synthesis of single-phase valentinite Sb2O3. in Journal of Sol-Gel Science and Technology. 2014;72(3):527-533.
doi:10.1007/s10971-014-3469-3 .

Vuković, Marina, Branković, Zorica, Poleti, Dejan, Recnik, Aleksander, Branković, Goran, "Novel simple methods for the synthesis of single-phase valentinite Sb2O3" in Journal of Sol-Gel Science and Technology, 72, no. 3 (2014):527-533,
https://doi.org/10.1007/s10971-014-3469-3 . .

TY  - CONF
AU  - Simović, Bojana
AU  - Veljković, Ivana
AU  - Poleti, Dejan
AU  - Branković, Goran
PY  - 2013
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3096
AB  - Nanoanatase powder was hydrothermally treated with LiOH, NaOH, KOH or
Ca(OH)2 at T = 120 ºC for 8 h. In all cases, the molar TiO2 : hydroxide ratio was
identical. The obtained samples were washed with distilled water, centrifuged and dried at room temperature. Characterization of the samples was done by X-ray
powder diffraction, TG/DTA/DSC and SEM analysis. Nanoanatase showed very
diverse reactivity toward different alkali and alkaline earth cations. The final
products showed different phase composition, crystallinity and microstructure. With
Li+
and Ca2+ anatase forms different titanate structures while with Na+
and K+
it
mainly retain original anatase structure.
PB  - Institute for Multidisciplinary Research, University of Belgrade
C3  - 2nd Conference of The Serbian Ceramic Society, Belgrade, Serbia, Programme&Book of Abstract
T1  - Hydrothermal treatment of nanoanatase with alkali and alkaline earth hydroxides
SP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3096
ER  - 

@conference{
author = "Simović, Bojana and Veljković, Ivana and Poleti, Dejan and Branković, Goran",
year = "2013",
abstract = "Nanoanatase powder was hydrothermally treated with LiOH, NaOH, KOH or
Ca(OH)2 at T = 120 ºC for 8 h. In all cases, the molar TiO2 : hydroxide ratio was
identical. The obtained samples were washed with distilled water, centrifuged and dried at room temperature. Characterization of the samples was done by X-ray
powder diffraction, TG/DTA/DSC and SEM analysis. Nanoanatase showed very
diverse reactivity toward different alkali and alkaline earth cations. The final
products showed different phase composition, crystallinity and microstructure. With
Li+
and Ca2+ anatase forms different titanate structures while with Na+
and K+
it
mainly retain original anatase structure.",
publisher = "Institute for Multidisciplinary Research, University of Belgrade",
journal = "2nd Conference of The Serbian Ceramic Society, Belgrade, Serbia, Programme&Book of Abstract",
title = "Hydrothermal treatment of nanoanatase with alkali and alkaline earth hydroxides",
pages = "61",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3096"
}

Simović, B., Veljković, I., Poleti, D.,& Branković, G.. (2013). Hydrothermal treatment of nanoanatase with alkali and alkaline earth hydroxides. in 2nd Conference of The Serbian Ceramic Society, Belgrade, Serbia, Programme&Book of Abstract
Institute for Multidisciplinary Research, University of Belgrade., 61.
https://hdl.handle.net/21.15107/rcub_rimsi_3096

Simović B, Veljković I, Poleti D, Branković G. Hydrothermal treatment of nanoanatase with alkali and alkaline earth hydroxides. in 2nd Conference of The Serbian Ceramic Society, Belgrade, Serbia, Programme&Book of Abstract. 2013;:61.
https://hdl.handle.net/21.15107/rcub_rimsi_3096 .

Simović, Bojana, Veljković, Ivana, Poleti, Dejan, Branković, Goran, "Hydrothermal treatment of nanoanatase with alkali and alkaline earth hydroxides" in 2nd Conference of The Serbian Ceramic Society, Belgrade, Serbia, Programme&Book of Abstract (2013):61,
https://hdl.handle.net/21.15107/rcub_rimsi_3096 .

TY  - CONF
AU  - Simović, Bojana
AU  - Veljković, Ivana
AU  - Rečnik, Aleksander
AU  - Djokic, Veljko
AU  - Poleti, Dejan
AU  - Petrovic, Rada
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3104
AB  - Anatase is a well-known photocatalyst mostly used to degrade or transform organic and inorganic water pollutants. Its photocatalytical properties depend on surface area, availability of active sites, pore sizes, number and nature of trapped sites, as well as on adsorption/desorption characteristics. In order to reach the highest performance, the main challenge is to find new methods for anatase preparation or modification to achieve a balance between mentioned properties.
In this work, hydrothermal treatments of anatase were carried out at 120, 150 and 180 °C during 6, 12 and 18 h in NaOH solution (c = 3 mol dm–3). The samples were characterized by X-ray powder diffraction (XRPD), scanning and transmission electron microscopy (SEM and TEM). The photocatalytic activity and efficiency of the samples were tested on Reactive Orange 16 (RO16) dye and compared to commercial P-25 powder (Degussa). The powders are coded as UT_t, where T is temperature of the treatment and t is duration of the treatment.
XRPD analysis showed that phase composition of the samples remains the same and confirms absence of the reaction between anatase and NaOH, which would result in formation of a sodium-titanate. Nanoparticles of modified anatase form soft agglomerates that differ in size 1 – 5 m, as SEM analysis showed. Size of modified nanoparticles is about 5 nm what is observed by TEM. It is also found that formation of anatase nanotubes, with lengths 100 – 250 nm, is started. The adsorption power of U120_18 and U150_6 samples is twice as much as adsorption power of P-25 powder. The samples U150_12 and U180_6 have adsorption power very similar to P-25, while all other samples show much lower adsorption power. The photocatalytic activity of all modified samples is lower than phtocatalytic activity of P-25, but because of higher adsorption power the overall efficiency of RO16 degradation in water with U120_18 and U150_6 samples is comparable to the efficiency of P-25 powder.
PB  - Tehnološko-metalurški fakultet, Univerzitet u Beogradu
C3  - First International Conference on Processing, characterization and application of nanostructured materials and nanotechnology (Nanobelgrade 2012), Belgrade, Serbia, Programme&Book of Abstract
T1  - Adsorption and photocatalytic of Reactive Orange 16 dye with hydrotermally modified anatase
SP  - 116
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3104
ER  - 

@conference{
author = "Simović, Bojana and Veljković, Ivana and Rečnik, Aleksander and Djokic, Veljko and Poleti, Dejan and Petrovic, Rada",
year = "2012",
abstract = "Anatase is a well-known photocatalyst mostly used to degrade or transform organic and inorganic water pollutants. Its photocatalytical properties depend on surface area, availability of active sites, pore sizes, number and nature of trapped sites, as well as on adsorption/desorption characteristics. In order to reach the highest performance, the main challenge is to find new methods for anatase preparation or modification to achieve a balance between mentioned properties.
In this work, hydrothermal treatments of anatase were carried out at 120, 150 and 180 °C during 6, 12 and 18 h in NaOH solution (c = 3 mol dm–3). The samples were characterized by X-ray powder diffraction (XRPD), scanning and transmission electron microscopy (SEM and TEM). The photocatalytic activity and efficiency of the samples were tested on Reactive Orange 16 (RO16) dye and compared to commercial P-25 powder (Degussa). The powders are coded as UT_t, where T is temperature of the treatment and t is duration of the treatment.
XRPD analysis showed that phase composition of the samples remains the same and confirms absence of the reaction between anatase and NaOH, which would result in formation of a sodium-titanate. Nanoparticles of modified anatase form soft agglomerates that differ in size 1 – 5 m, as SEM analysis showed. Size of modified nanoparticles is about 5 nm what is observed by TEM. It is also found that formation of anatase nanotubes, with lengths 100 – 250 nm, is started. The adsorption power of U120_18 and U150_6 samples is twice as much as adsorption power of P-25 powder. The samples U150_12 and U180_6 have adsorption power very similar to P-25, while all other samples show much lower adsorption power. The photocatalytic activity of all modified samples is lower than phtocatalytic activity of P-25, but because of higher adsorption power the overall efficiency of RO16 degradation in water with U120_18 and U150_6 samples is comparable to the efficiency of P-25 powder.",
publisher = "Tehnološko-metalurški fakultet, Univerzitet u Beogradu",
journal = "First International Conference on Processing, characterization and application of nanostructured materials and nanotechnology (Nanobelgrade 2012), Belgrade, Serbia, Programme&Book of Abstract",
title = "Adsorption and photocatalytic of Reactive Orange 16 dye with hydrotermally modified anatase",
pages = "116",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3104"
}

Simović, B., Veljković, I., Rečnik, A., Djokic, V., Poleti, D.,& Petrovic, R.. (2012). Adsorption and photocatalytic of Reactive Orange 16 dye with hydrotermally modified anatase. in First International Conference on Processing, characterization and application of nanostructured materials and nanotechnology (Nanobelgrade 2012), Belgrade, Serbia, Programme&Book of Abstract
Tehnološko-metalurški fakultet, Univerzitet u Beogradu., 116.
https://hdl.handle.net/21.15107/rcub_rimsi_3104

Simović B, Veljković I, Rečnik A, Djokic V, Poleti D, Petrovic R. Adsorption and photocatalytic of Reactive Orange 16 dye with hydrotermally modified anatase. in First International Conference on Processing, characterization and application of nanostructured materials and nanotechnology (Nanobelgrade 2012), Belgrade, Serbia, Programme&Book of Abstract. 2012;:116.
https://hdl.handle.net/21.15107/rcub_rimsi_3104 .

Simović, Bojana, Veljković, Ivana, Rečnik, Aleksander, Djokic, Veljko, Poleti, Dejan, Petrovic, Rada, "Adsorption and photocatalytic of Reactive Orange 16 dye with hydrotermally modified anatase" in First International Conference on Processing, characterization and application of nanostructured materials and nanotechnology (Nanobelgrade 2012), Belgrade, Serbia, Programme&Book of Abstract (2012):116,
https://hdl.handle.net/21.15107/rcub_rimsi_3104 .

TY  - CONF
AU  - Zdravkovic, Jelena
AU  - Poleti, Dejan
AU  - Veljković, Ivana
AU  - Rogan, Jelena
AU  - Simović, Bojana
PY  - 2012
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3101
AB  - Nedavno je otkriveno da litijum-tereftalat (Li2tpht) pokazuje veću termičku stabilnost u poređenju sa konvencionalnim anodnim materijalima u litijum-jonskim baterijama [1]. U ovom radu upoređena su dva postupka sinteze pomenutog jedinjenja. Prvi postupak opisan je od strane Kaduka [2], dok drugi pristup predstavlja nov postupak. Prema Kaduku, Li2tpht dobijen je taloženjem iz vodene suspenzije koji sadrži Li2O i tereftalnu kiselinu (H2tpht) u molskom odnosu 1:1. Novi postupak zasnovan je na jednostavnom mlevenju reaktanata, Li2CO3 i H2tpht, u ahatnom avanu. Oba uzorka okarakterisana su pomoću FTIR spektrokopije, TG/DSC i XRD analize. Dobijeni rezultati su međusobno upoređeni i diskutovani.

[1] M. Armand, S. Grugeon, Nature Mater. 8, 120-125 (2009). 
[2] J. A. Kaduk, Acta Crystallogr. B56, 474-485 (2000).
AB  - Recently, it has been discovered that dilithium terephthalate (Li2tpht) shows enhanced thermal stability over conventional anode materials for Li-ion batteries [1]. This investigation compares two ways of synthesis of the mentioned compound. The first one was described by Kaduk [2] and the other approach presents a new procedure. According to Kaduk, Li2tpht is obtained by precipitation from an aqueous suspension containing Li2O and terephthalic acid (H2tpht) in a molar ratio 1:1. The new method is based on a simple grinding of Li2CO3 and H2tpht in an agate mortar. Both samples were characterized by FTIR spectroscopy, TG/DSC and XRD analysis. The obtained results are compared and discussed.
PB  - Srpsko hemijsko društvo, Beograd
C3  - First International Conference of Young Chemists of Serbia, Conference Proceeding, Belgrade, Book of Abstracts
T1  - New method for synthesis of dilithium terephthalate
SP  - 65
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_3101
ER  - 

@conference{
author = "Zdravkovic, Jelena and Poleti, Dejan and Veljković, Ivana and Rogan, Jelena and Simović, Bojana",
year = "2012",
abstract = "Nedavno je otkriveno da litijum-tereftalat (Li2tpht) pokazuje veću termičku stabilnost u poređenju sa konvencionalnim anodnim materijalima u litijum-jonskim baterijama [1]. U ovom radu upoređena su dva postupka sinteze pomenutog jedinjenja. Prvi postupak opisan je od strane Kaduka [2], dok drugi pristup predstavlja nov postupak. Prema Kaduku, Li2tpht dobijen je taloženjem iz vodene suspenzije koji sadrži Li2O i tereftalnu kiselinu (H2tpht) u molskom odnosu 1:1. Novi postupak zasnovan je na jednostavnom mlevenju reaktanata, Li2CO3 i H2tpht, u ahatnom avanu. Oba uzorka okarakterisana su pomoću FTIR spektrokopije, TG/DSC i XRD analize. Dobijeni rezultati su međusobno upoređeni i diskutovani.

[1] M. Armand, S. Grugeon, Nature Mater. 8, 120-125 (2009). 
[2] J. A. Kaduk, Acta Crystallogr. B56, 474-485 (2000)., Recently, it has been discovered that dilithium terephthalate (Li2tpht) shows enhanced thermal stability over conventional anode materials for Li-ion batteries [1]. This investigation compares two ways of synthesis of the mentioned compound. The first one was described by Kaduk [2] and the other approach presents a new procedure. According to Kaduk, Li2tpht is obtained by precipitation from an aqueous suspension containing Li2O and terephthalic acid (H2tpht) in a molar ratio 1:1. The new method is based on a simple grinding of Li2CO3 and H2tpht in an agate mortar. Both samples were characterized by FTIR spectroscopy, TG/DSC and XRD analysis. The obtained results are compared and discussed.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "First International Conference of Young Chemists of Serbia, Conference Proceeding, Belgrade, Book of Abstracts",
title = "New method for synthesis of dilithium terephthalate",
pages = "65",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_3101"
}

Zdravkovic, J., Poleti, D., Veljković, I., Rogan, J.,& Simović, B.. (2012). New method for synthesis of dilithium terephthalate. in First International Conference of Young Chemists of Serbia, Conference Proceeding, Belgrade, Book of Abstracts
Srpsko hemijsko društvo, Beograd., 65.
https://hdl.handle.net/21.15107/rcub_rimsi_3101

Zdravkovic J, Poleti D, Veljković I, Rogan J, Simović B. New method for synthesis of dilithium terephthalate. in First International Conference of Young Chemists of Serbia, Conference Proceeding, Belgrade, Book of Abstracts. 2012;:65.
https://hdl.handle.net/21.15107/rcub_rimsi_3101 .

Zdravkovic, Jelena, Poleti, Dejan, Veljković, Ivana, Rogan, Jelena, Simović, Bojana, "New method for synthesis of dilithium terephthalate" in First International Conference of Young Chemists of Serbia, Conference Proceeding, Belgrade, Book of Abstracts (2012):65,
https://hdl.handle.net/21.15107/rcub_rimsi_3101 .

TY  - JOUR
AU  - Luković Golić, Danijela
AU  - Branković, Goran
AU  - Počuča-Nešić, Milica
AU  - Vojisavljević, Katarina
AU  - Recnik, Aleksander
AU  - Daneu, Nina
AU  - Bernik, Slavko
AU  - Šćepanović, Maja
AU  - Poleti, Dejan
AU  - Branković, Zorica
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/469
AB  - Zinc oxide nanopowders were synthesized by the sol-gel method from an ethanol solution of zinc acetate dihydrate. Detailed structural and microstructural investigations were carried out using x-ray diffraction, Raman spectroscopy, thermogravimetric and differential thermal analyses, as well as high-resolution transmission electron microscopy (TEM) and field-emission scanning electron microscopy. The intermediate compound of the reaction was layered zinc hydroxide acetate that further transforms into hexagonally shaped ZnO crystalline nanoplates (d(m) = 4 nm), which aggregate into larger spherical particles. According to the TEM analysis the ZnO nanoparticles were self-assembled into larger particles with the same orientation, i.e. aligned lattice planes of the particles. A further solvothermal treatment resulted in hexagonal, prismatic ZnO mesocrystals.
PB  - IOP Publishing Ltd, Bristol
T2  - Nanotechnology
T1  - Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O
IS  - 39
VL  - 22
DO  - 10.1088/0957-4484/22/39/395603
ER  - 

@article{
author = "Luković Golić, Danijela and Branković, Goran and Počuča-Nešić, Milica and Vojisavljević, Katarina and Recnik, Aleksander and Daneu, Nina and Bernik, Slavko and Šćepanović, Maja and Poleti, Dejan and Branković, Zorica",
year = "2011",
abstract = "Zinc oxide nanopowders were synthesized by the sol-gel method from an ethanol solution of zinc acetate dihydrate. Detailed structural and microstructural investigations were carried out using x-ray diffraction, Raman spectroscopy, thermogravimetric and differential thermal analyses, as well as high-resolution transmission electron microscopy (TEM) and field-emission scanning electron microscopy. The intermediate compound of the reaction was layered zinc hydroxide acetate that further transforms into hexagonally shaped ZnO crystalline nanoplates (d(m) = 4 nm), which aggregate into larger spherical particles. According to the TEM analysis the ZnO nanoparticles were self-assembled into larger particles with the same orientation, i.e. aligned lattice planes of the particles. A further solvothermal treatment resulted in hexagonal, prismatic ZnO mesocrystals.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Nanotechnology",
title = "Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O",
number = "39",
volume = "22",
doi = "10.1088/0957-4484/22/39/395603"
}

Luković Golić, D., Branković, G., Počuča-Nešić, M., Vojisavljević, K., Recnik, A., Daneu, N., Bernik, S., Šćepanović, M., Poleti, D.,& Branković, Z.. (2011). Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O. in Nanotechnology
IOP Publishing Ltd, Bristol., 22(39).
https://doi.org/10.1088/0957-4484/22/39/395603

Luković Golić D, Branković G, Počuča-Nešić M, Vojisavljević K, Recnik A, Daneu N, Bernik S, Šćepanović M, Poleti D, Branković Z. Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O. in Nanotechnology. 2011;22(39).
doi:10.1088/0957-4484/22/39/395603 .

Luković Golić, Danijela, Branković, Goran, Počuča-Nešić, Milica, Vojisavljević, Katarina, Recnik, Aleksander, Daneu, Nina, Bernik, Slavko, Šćepanović, Maja, Poleti, Dejan, Branković, Zorica, "Structural characterization of self-assembled ZnO nanoparticles obtained by the sol-gel method from Zn(CH3COO)(2)center dot 2H(2)O" in Nanotechnology, 22, no. 39 (2011),
https://doi.org/10.1088/0957-4484/22/39/395603 . .

TY  - JOUR
AU  - Veljković, Ivana
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Zdujić, Miodrag V.
AU  - Branković, Goran
PY  - 2011
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/495
AB  - Extra phase-pure Li4Ti5O12 spinel with particle sizes less than 500 nm was synthesized by solid state reaction of mechanochemicaly activated mixture of nano anatase and Li2CO3 for a very short annealing time, 4 h at 800 degrees C. Structural and microstructural properties, the mechanism of solid state reaction between anatase and Li2CO3 as well as thermal stability of prepared spinel were investigated using XRPD, SEM and TG/DSC analysis. The mechanism of reaction implies decomposition of Li2CO3 below 250 degrees C, formation of monoclinic Li2TiO3 as intermediate product between 400 and 600 degrees C and its transformation to Li4Ti5O12 between 600-800 degrees C. The spinel structure is stable up to 1000 degrees C when it is decomposed due to Li2O evaporation.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel
EP  - 351
IS  - 3
SP  - 343
VL  - 43
DO  - 10.2298/SOS1103343V
ER  - 

@article{
author = "Veljković, Ivana and Poleti, Dejan and Karanović, Ljiljana C. and Zdujić, Miodrag V. and Branković, Goran",
year = "2011",
abstract = "Extra phase-pure Li4Ti5O12 spinel with particle sizes less than 500 nm was synthesized by solid state reaction of mechanochemicaly activated mixture of nano anatase and Li2CO3 for a very short annealing time, 4 h at 800 degrees C. Structural and microstructural properties, the mechanism of solid state reaction between anatase and Li2CO3 as well as thermal stability of prepared spinel were investigated using XRPD, SEM and TG/DSC analysis. The mechanism of reaction implies decomposition of Li2CO3 below 250 degrees C, formation of monoclinic Li2TiO3 as intermediate product between 400 and 600 degrees C and its transformation to Li4Ti5O12 between 600-800 degrees C. The spinel structure is stable up to 1000 degrees C when it is decomposed due to Li2O evaporation.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel",
pages = "351-343",
number = "3",
volume = "43",
doi = "10.2298/SOS1103343V"
}

Veljković, I., Poleti, D., Karanović, L. C., Zdujić, M. V.,& Branković, G.. (2011). Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 43(3), 343-351.
https://doi.org/10.2298/SOS1103343V

Veljković I, Poleti D, Karanović LC, Zdujić MV, Branković G. Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel. in Science of Sintering. 2011;43(3):343-351.
doi:10.2298/SOS1103343V .

Veljković, Ivana, Poleti, Dejan, Karanović, Ljiljana C., Zdujić, Miodrag V., Branković, Goran, "Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel" in Science of Sintering, 43, no. 3 (2011):343-351,
https://doi.org/10.2298/SOS1103343V . .

TY  - JOUR
AU  - Počuča-Nešić, Milica
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Vasiljević-Radović, Dana
AU  - Poleti, Dejan
PY  - 2008
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/293
AB  - The morphology of perovskite LaNiO3 (LNO) thin films is a very important feature considering the fact that they could be used as an electrode material in ferroelectric devices. In this work, LNO films were prepared from citrate precursors. The films were deposited on Si (100) and Pt covered Si substrates [Pt (111)/Ti/SiO2/Si] Using the spin-on technique. The phase composition of the films was confirmed by X-ray powder diffraction analysis, while the microstructures were investigated by atomic force microscopy. The influence of the metal ion:citric acid:ethylene glycol ratio on the morphology of the films was investigated. After optimization of these parameters, very homogenous, uniform and crack-free LNO films were obtained.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Microstructure of LaNiO3 thin films obtained by the spin-on technique from citrate precursors
EP  - 303
IS  - 2
SP  - 299
VL  - 34
DO  - 10.1016/j.ceramint.2006.10.003
ER  - 

@article{
author = "Počuča-Nešić, Milica and Branković, Goran and Branković, Zorica and Vasiljević-Radović, Dana and Poleti, Dejan",
year = "2008",
abstract = "The morphology of perovskite LaNiO3 (LNO) thin films is a very important feature considering the fact that they could be used as an electrode material in ferroelectric devices. In this work, LNO films were prepared from citrate precursors. The films were deposited on Si (100) and Pt covered Si substrates [Pt (111)/Ti/SiO2/Si] Using the spin-on technique. The phase composition of the films was confirmed by X-ray powder diffraction analysis, while the microstructures were investigated by atomic force microscopy. The influence of the metal ion:citric acid:ethylene glycol ratio on the morphology of the films was investigated. After optimization of these parameters, very homogenous, uniform and crack-free LNO films were obtained.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Microstructure of LaNiO3 thin films obtained by the spin-on technique from citrate precursors",
pages = "303-299",
number = "2",
volume = "34",
doi = "10.1016/j.ceramint.2006.10.003"
}

Počuča-Nešić, M., Branković, G., Branković, Z., Vasiljević-Radović, D.,& Poleti, D.. (2008). Microstructure of LaNiO3 thin films obtained by the spin-on technique from citrate precursors. in Ceramics International
Elsevier Sci Ltd, Oxford., 34(2), 299-303.
https://doi.org/10.1016/j.ceramint.2006.10.003

Počuča-Nešić M, Branković G, Branković Z, Vasiljević-Radović D, Poleti D. Microstructure of LaNiO3 thin films obtained by the spin-on technique from citrate precursors. in Ceramics International. 2008;34(2):299-303.
doi:10.1016/j.ceramint.2006.10.003 .

Počuča-Nešić, Milica, Branković, Goran, Branković, Zorica, Vasiljević-Radović, Dana, Poleti, Dejan, "Microstructure of LaNiO3 thin films obtained by the spin-on technique from citrate precursors" in Ceramics International, 34, no. 2 (2008):299-303,
https://doi.org/10.1016/j.ceramint.2006.10.003 . .

TY  - JOUR
AU  - Djuriš, K.
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Bernik, Slavko
AU  - Počuča-Nešić, Milica
AU  - Poleti, Dejan
AU  - Antić, B.
PY  - 2007
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/218
AB  - In this work pure and doped LMO were prepared using modified Pechini method from lanthanum and manganese citrates. Lanthanum citrate was prepared starting from La2O3, while manganese citrate was prepared from Mn(NO3)(2). Valence state of the manganese was controlled by adjusting pH value of the solution and confirmed by EPR and UV/VIS analysis. Thermal treatment conditions for preparation of LMO powders were determined from TG/DTA of dried precursors. XRD results confirmed that pure perovskite phase was successfully prepared in single LMO and Ca-doped LMO. SEM and measurements of specific surface area of the powders showed the existence of large agglomerates consisting of submicronic primary particles.
PB  - Trans Tech Publications Ltd
T2  - Materials Science Forum
T1  - Synthesis of pure and doped LaMnO3 powders from citrate precursors
EP  - 242
SP  - 237
VL  - 555
DO  - 10.4028/0-87849-441-3.237
ER  - 

@article{
author = "Djuriš, K. and Branković, Goran and Branković, Zorica and Bernik, Slavko and Počuča-Nešić, Milica and Poleti, Dejan and Antić, B.",
year = "2007",
abstract = "In this work pure and doped LMO were prepared using modified Pechini method from lanthanum and manganese citrates. Lanthanum citrate was prepared starting from La2O3, while manganese citrate was prepared from Mn(NO3)(2). Valence state of the manganese was controlled by adjusting pH value of the solution and confirmed by EPR and UV/VIS analysis. Thermal treatment conditions for preparation of LMO powders were determined from TG/DTA of dried precursors. XRD results confirmed that pure perovskite phase was successfully prepared in single LMO and Ca-doped LMO. SEM and measurements of specific surface area of the powders showed the existence of large agglomerates consisting of submicronic primary particles.",
publisher = "Trans Tech Publications Ltd",
journal = "Materials Science Forum",
title = "Synthesis of pure and doped LaMnO3 powders from citrate precursors",
pages = "242-237",
volume = "555",
doi = "10.4028/0-87849-441-3.237"
}

Djuriš, K., Branković, G., Branković, Z., Bernik, S., Počuča-Nešić, M., Poleti, D.,& Antić, B.. (2007). Synthesis of pure and doped LaMnO3 powders from citrate precursors. in Materials Science Forum
Trans Tech Publications Ltd., 555, 237-242.
https://doi.org/10.4028/0-87849-441-3.237

Djuriš K, Branković G, Branković Z, Bernik S, Počuča-Nešić M, Poleti D, Antić B. Synthesis of pure and doped LaMnO3 powders from citrate precursors. in Materials Science Forum. 2007;555:237-242.
doi:10.4028/0-87849-441-3.237 .

Djuriš, K., Branković, Goran, Branković, Zorica, Bernik, Slavko, Počuča-Nešić, Milica, Poleti, Dejan, Antić, B., "Synthesis of pure and doped LaMnO3 powders from citrate precursors" in Materials Science Forum, 555 (2007):237-242,
https://doi.org/10.4028/0-87849-441-3.237 . .

TY  - JOUR
AU  - Počuča-Nešić, Milica
AU  - Branković, Goran
AU  - Branković, Zorica
AU  - Vasiljević-Radović, Dana
AU  - Poleti, Dejan
PY  - 2007
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/204
AB  - Lanthanum nickel oxide (LaNiO3) is an electrically conductive ceramics, which has a potential use as electrode for ferroelectric thin films, multilayer actuators and many other electronic devices. In this work, LaNiO3 thin films were prepared by a modified Pechini process, based on polymeric citrate precursors. DTA analysis of the precursor solution showed that formation and crystallization of LaNiO3 were completed up to 790 degrees C. Films were deposited using spin-on technique and thermally treated in temperature range 600-800 degrees C, with heating rate of 1 degrees/min. Processing parameters, such as concentration and annealing temperature, as well as number of deposited layers were optimized to achieve desired film quality. The structure of LaNiO3 was confirmed by X-ray diffraction analysis, whereas microstructural parameters, such as grain size and roughness, were analyzed by AFM.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of the European Ceramic Society
T1  - Optimization of processing parameters for preparation of LaNiO3 thin films from the citrate precursors
EP  - 1086
IS  - 2-3
SP  - 1083
VL  - 27
DO  - 10.1016/j.jeurceramsoc.2006.05.021
ER  - 

@article{
author = "Počuča-Nešić, Milica and Branković, Goran and Branković, Zorica and Vasiljević-Radović, Dana and Poleti, Dejan",
year = "2007",
abstract = "Lanthanum nickel oxide (LaNiO3) is an electrically conductive ceramics, which has a potential use as electrode for ferroelectric thin films, multilayer actuators and many other electronic devices. In this work, LaNiO3 thin films were prepared by a modified Pechini process, based on polymeric citrate precursors. DTA analysis of the precursor solution showed that formation and crystallization of LaNiO3 were completed up to 790 degrees C. Films were deposited using spin-on technique and thermally treated in temperature range 600-800 degrees C, with heating rate of 1 degrees/min. Processing parameters, such as concentration and annealing temperature, as well as number of deposited layers were optimized to achieve desired film quality. The structure of LaNiO3 was confirmed by X-ray diffraction analysis, whereas microstructural parameters, such as grain size and roughness, were analyzed by AFM.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of the European Ceramic Society",
title = "Optimization of processing parameters for preparation of LaNiO3 thin films from the citrate precursors",
pages = "1086-1083",
number = "2-3",
volume = "27",
doi = "10.1016/j.jeurceramsoc.2006.05.021"
}

Počuča-Nešić, M., Branković, G., Branković, Z., Vasiljević-Radović, D.,& Poleti, D.. (2007). Optimization of processing parameters for preparation of LaNiO3 thin films from the citrate precursors. in Journal of the European Ceramic Society
Elsevier Sci Ltd, Oxford., 27(2-3), 1083-1086.
https://doi.org/10.1016/j.jeurceramsoc.2006.05.021

Počuča-Nešić M, Branković G, Branković Z, Vasiljević-Radović D, Poleti D. Optimization of processing parameters for preparation of LaNiO3 thin films from the citrate precursors. in Journal of the European Ceramic Society. 2007;27(2-3):1083-1086.
doi:10.1016/j.jeurceramsoc.2006.05.021 .

Počuča-Nešić, Milica, Branković, Goran, Branković, Zorica, Vasiljević-Radović, Dana, Poleti, Dejan, "Optimization of processing parameters for preparation of LaNiO3 thin films from the citrate precursors" in Journal of the European Ceramic Society, 27, no. 2-3 (2007):1083-1086,
https://doi.org/10.1016/j.jeurceramsoc.2006.05.021 . .

TY  - JOUR
AU  - Žunić, Milan
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Poleti, Dejan
PY  - 2006
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/161
AB  - The effect of Co, Cr and Nb on the electrical properties of the grain boundaries of SnO2-based varistors was investigated. The powders were prepared by the method of evaporation and decomposition of solutions and suspensions. Varistor samples were obtained by uniaxial pressing followed by sintering at 1300 degrees C for 1h. The electrical properties of the grain-boundary region, such as resistance (R) and capacitance (C), were determined using ac impedance spectroscopy in the 27-330 degrees C temperature interval. Activation energies for conduction (E-A) were calculated from the Arrhenius equation. The non-linear coefficients (alpha) and the breakdown electric fields (E-b) of the samples were determined from the current-voltage characteristics. The potential barrier height (Phi(b)) was calculated using the Schottky-type conducting model. After a comparison of the characteristic parameters for different varistor compositions it was found that the Cr/Nb ratio has a crucial influence on the grain-boundary properties in SnO2 varistors.
PB  - Trans Tech Publications Ltd
T2  - Materials Science Forum
T1  - Electrical characterization of the grain-boundary region of SnO2 varistors
EP  - 240
SP  - 235
VL  - 518
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_161
ER  - 

@article{
author = "Žunić, Milan and Branković, Zorica and Branković, Goran and Poleti, Dejan",
year = "2006",
abstract = "The effect of Co, Cr and Nb on the electrical properties of the grain boundaries of SnO2-based varistors was investigated. The powders were prepared by the method of evaporation and decomposition of solutions and suspensions. Varistor samples were obtained by uniaxial pressing followed by sintering at 1300 degrees C for 1h. The electrical properties of the grain-boundary region, such as resistance (R) and capacitance (C), were determined using ac impedance spectroscopy in the 27-330 degrees C temperature interval. Activation energies for conduction (E-A) were calculated from the Arrhenius equation. The non-linear coefficients (alpha) and the breakdown electric fields (E-b) of the samples were determined from the current-voltage characteristics. The potential barrier height (Phi(b)) was calculated using the Schottky-type conducting model. After a comparison of the characteristic parameters for different varistor compositions it was found that the Cr/Nb ratio has a crucial influence on the grain-boundary properties in SnO2 varistors.",
publisher = "Trans Tech Publications Ltd",
journal = "Materials Science Forum",
title = "Electrical characterization of the grain-boundary region of SnO2 varistors",
pages = "240-235",
volume = "518",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_161"
}

Žunić, M., Branković, Z., Branković, G.,& Poleti, D.. (2006). Electrical characterization of the grain-boundary region of SnO2 varistors. in Materials Science Forum
Trans Tech Publications Ltd., 518, 235-240.
https://hdl.handle.net/21.15107/rcub_rimsi_161

Žunić M, Branković Z, Branković G, Poleti D. Electrical characterization of the grain-boundary region of SnO2 varistors. in Materials Science Forum. 2006;518:235-240.
https://hdl.handle.net/21.15107/rcub_rimsi_161 .

Žunić, Milan, Branković, Zorica, Branković, Goran, Poleti, Dejan, "Electrical characterization of the grain-boundary region of SnO2 varistors" in Materials Science Forum, 518 (2006):235-240,
https://hdl.handle.net/21.15107/rcub_rimsi_161 .

TY  - JOUR
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Zdujić, Miodrag V.
AU  - Jovalekic, E
AU  - Branković, Zorica
PY  - 2004
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/101
AB  - A series of gamma-Bi2O3 phases doped with Zn, Si, Pb and Fe was prepared by mechanochemical treatment of corresponding oxide mixtures with a nominal composition 6Bi(2)O(3) (.) MOx (MOx = ZnO, SiO2, PbO) and 12Bi(2)O(3) (.) Fe2O3 using high-energy ball mill. The products are characterized by X-ray powder diffraction technique. Influence of milling conditions: milling time from 5 min to 10 h, milling medium (steel or ZrO2) and injected mechanical power on unit-cell parameters and crystallinity of products, as well as on reaction kinetics are investigated and discussed.
PB  - Elsevier, Amsterdam
T2  - Solid State Sciences
T1  - Mechanochemical synthesis of gamma-Bi2O3
EP  - 245
IS  - 3
SP  - 239
VL  - 6
DO  - 10.1016/j.solidstatesciences.2003.12.003
ER  - 

@article{
author = "Poleti, Dejan and Karanović, Ljiljana C. and Zdujić, Miodrag V. and Jovalekic, E and Branković, Zorica",
year = "2004",
abstract = "A series of gamma-Bi2O3 phases doped with Zn, Si, Pb and Fe was prepared by mechanochemical treatment of corresponding oxide mixtures with a nominal composition 6Bi(2)O(3) (.) MOx (MOx = ZnO, SiO2, PbO) and 12Bi(2)O(3) (.) Fe2O3 using high-energy ball mill. The products are characterized by X-ray powder diffraction technique. Influence of milling conditions: milling time from 5 min to 10 h, milling medium (steel or ZrO2) and injected mechanical power on unit-cell parameters and crystallinity of products, as well as on reaction kinetics are investigated and discussed.",
publisher = "Elsevier, Amsterdam",
journal = "Solid State Sciences",
title = "Mechanochemical synthesis of gamma-Bi2O3",
pages = "245-239",
number = "3",
volume = "6",
doi = "10.1016/j.solidstatesciences.2003.12.003"
}

Poleti, D., Karanović, L. C., Zdujić, M. V., Jovalekic, E.,& Branković, Z.. (2004). Mechanochemical synthesis of gamma-Bi2O3. in Solid State Sciences
Elsevier, Amsterdam., 6(3), 239-245.
https://doi.org/10.1016/j.solidstatesciences.2003.12.003

Poleti D, Karanović LC, Zdujić MV, Jovalekic E, Branković Z. Mechanochemical synthesis of gamma-Bi2O3. in Solid State Sciences. 2004;6(3):239-245.
doi:10.1016/j.solidstatesciences.2003.12.003 .

Poleti, Dejan, Karanović, Ljiljana C., Zdujić, Miodrag V., Jovalekic, E, Branković, Zorica, "Mechanochemical synthesis of gamma-Bi2O3" in Solid State Sciences, 6, no. 3 (2004):239-245,
https://doi.org/10.1016/j.solidstatesciences.2003.12.003 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Branković, Goran
AU  - Poleti, Dejan
AU  - Varela, JA
PY  - 2001
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/63
AB  - Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately synthesized constituent phases (DSCP method). Compositions of constituent phases in sintered samples were investigated by changes of lattice parameters of the phases, as well as by EDS analysis of the constituent phases. It was found that compositions of ZnO, intergranular and spinel phases were partially changed during sintering due to redistribution of additives, that was controlled by starting spinel composition and its stability. Electrical characterization showed significant difference in electrical properties of investigated varistors: nonlinearity coefficients ranging from 22 to 55 and leakage currents differing by the order of magnitude. Activation energies of conduction were obtained from ac impedance spectroscopy measurements. Calculated values of activation energies were in the range 0.61-1.0 eV confirming difference in defect structure of ZnO grain boundaries in varistors containing different spinel phases.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Structural and electrical properties of ZnO varistors containing different spinel phases
EP  - 122
IS  - 1
SP  - 115
VL  - 27
DO  - 10.1016/S0272-8842(00)00051-1
ER  - 

@article{
author = "Branković, Zorica and Branković, Goran and Poleti, Dejan and Varela, JA",
year = "2001",
abstract = "Structural and electrical properties of ZnO varistors were investigated as a function of spinel composition. Six varistor mixtures differing only in chemical composition of spinel, were prepared by mixing separately synthesized constituent phases (DSCP method). Compositions of constituent phases in sintered samples were investigated by changes of lattice parameters of the phases, as well as by EDS analysis of the constituent phases. It was found that compositions of ZnO, intergranular and spinel phases were partially changed during sintering due to redistribution of additives, that was controlled by starting spinel composition and its stability. Electrical characterization showed significant difference in electrical properties of investigated varistors: nonlinearity coefficients ranging from 22 to 55 and leakage currents differing by the order of magnitude. Activation energies of conduction were obtained from ac impedance spectroscopy measurements. Calculated values of activation energies were in the range 0.61-1.0 eV confirming difference in defect structure of ZnO grain boundaries in varistors containing different spinel phases.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Structural and electrical properties of ZnO varistors containing different spinel phases",
pages = "122-115",
number = "1",
volume = "27",
doi = "10.1016/S0272-8842(00)00051-1"
}

Branković, Z., Branković, G., Poleti, D.,& Varela, J.. (2001). Structural and electrical properties of ZnO varistors containing different spinel phases. in Ceramics International
Elsevier Sci Ltd, Oxford., 27(1), 115-122.
https://doi.org/10.1016/S0272-8842(00)00051-1

Branković Z, Branković G, Poleti D, Varela J. Structural and electrical properties of ZnO varistors containing different spinel phases. in Ceramics International. 2001;27(1):115-122.
doi:10.1016/S0272-8842(00)00051-1 .

Branković, Zorica, Branković, Goran, Poleti, Dejan, Varela, JA, "Structural and electrical properties of ZnO varistors containing different spinel phases" in Ceramics International, 27, no. 1 (2001):115-122,
https://doi.org/10.1016/S0272-8842(00)00051-1 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Milošević, Olivera
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Uskoković, D
PY  - 2000
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/55
AB  - ZnO varistors with non-linearity coefficients reaching 50 and low values of the leakage current (similar to0.01 A/m(2)), were obtained by a method referred to as "direct mixing of constituent phases". The method is based on sintering of a mixture of the constituent phases with the following compositions: ZnO phase uniformly doped with Co2+ and Mn2+; intergranular phase: gamma -Bi2O3 stabilized with Mn2+ or Zn2+; spinel phase: Zn1.971Ni0.090Co0.030Cr0.247Mn0.090Sb0.545O4 AS proved, the obtained varistors are composed of the same phases as those introduced into the system. The influence of composition as well as milling and sintering parameters on the varistor characteristics were investigated. Some varistor powder mixtures were intensively milled before sintering. As a result, high density ceramics with higly homogeneous microstructure were obtained after sintering.
PB  - Japan Inst Metals & Materials, Sendai
T2  - Materials Transactions Jim
T1  - ZnO varistors prepared by direct mixing of constituent phases
EP  - 1231
IS  - 9
SP  - 1226
VL  - 41
DO  - 10.2320/matertrans1989.41.1226
ER  - 

@article{
author = "Branković, Zorica and Milošević, Olivera and Poleti, Dejan and Karanović, Ljiljana C. and Uskoković, D",
year = "2000",
abstract = "ZnO varistors with non-linearity coefficients reaching 50 and low values of the leakage current (similar to0.01 A/m(2)), were obtained by a method referred to as "direct mixing of constituent phases". The method is based on sintering of a mixture of the constituent phases with the following compositions: ZnO phase uniformly doped with Co2+ and Mn2+; intergranular phase: gamma -Bi2O3 stabilized with Mn2+ or Zn2+; spinel phase: Zn1.971Ni0.090Co0.030Cr0.247Mn0.090Sb0.545O4 AS proved, the obtained varistors are composed of the same phases as those introduced into the system. The influence of composition as well as milling and sintering parameters on the varistor characteristics were investigated. Some varistor powder mixtures were intensively milled before sintering. As a result, high density ceramics with higly homogeneous microstructure were obtained after sintering.",
publisher = "Japan Inst Metals & Materials, Sendai",
journal = "Materials Transactions Jim",
title = "ZnO varistors prepared by direct mixing of constituent phases",
pages = "1231-1226",
number = "9",
volume = "41",
doi = "10.2320/matertrans1989.41.1226"
}

Branković, Z., Milošević, O., Poleti, D., Karanović, L. C.,& Uskoković, D.. (2000). ZnO varistors prepared by direct mixing of constituent phases. in Materials Transactions Jim
Japan Inst Metals & Materials, Sendai., 41(9), 1226-1231.
https://doi.org/10.2320/matertrans1989.41.1226

Branković Z, Milošević O, Poleti D, Karanović LC, Uskoković D. ZnO varistors prepared by direct mixing of constituent phases. in Materials Transactions Jim. 2000;41(9):1226-1231.
doi:10.2320/matertrans1989.41.1226 .

Branković, Zorica, Milošević, Olivera, Poleti, Dejan, Karanović, Ljiljana C., Uskoković, D, "ZnO varistors prepared by direct mixing of constituent phases" in Materials Transactions Jim, 41, no. 9 (2000):1226-1231,
https://doi.org/10.2320/matertrans1989.41.1226 . .

TY  - JOUR
AU  - Branković, Zorica
AU  - Poleti, Dejan
AU  - Karanović, Ljiljana C.
AU  - Uskoković, D
PY  - 1998
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/44
AB  - The method of directed synthesis of the constituent phases (DSCP) was applied to investigate the influence of spinel phase composition on characteristics of ZnO varistors. Six varistor mixtures differing only in chemical composition of the spinel phase were prepared. The phase ratio as well as the compositions of ZnO and intergranular gamma-Bi2O3 phases were the same in all samples. Characterization of prepared varistors was performed by X-ray diffraction, SEM and electrical measurements. It was shown that it is possible, in certain cases, to estimate additive redistribution taking into account changes in lattice constants of ZnO, spinel phases and varistor composition. Comparison of six different raristor mixtures shows that it is possible to reduce the number of components of the system if all main constituents of the varistor microstructure are still present. Results confirmed advantages of the DSCP method in preparation of varistors of required phase composition and properties.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Advanced Materials and Processes: Yucomat Ii
T1  - Influence of spinel phase composition on ZnO varistors properties
EP  - 232
SP  - 225
VL  - 282-2
DO  - 10.4028/www.scientific.net/MSF.282-283.225
ER  - 

@article{
author = "Branković, Zorica and Poleti, Dejan and Karanović, Ljiljana C. and Uskoković, D",
year = "1998",
abstract = "The method of directed synthesis of the constituent phases (DSCP) was applied to investigate the influence of spinel phase composition on characteristics of ZnO varistors. Six varistor mixtures differing only in chemical composition of the spinel phase were prepared. The phase ratio as well as the compositions of ZnO and intergranular gamma-Bi2O3 phases were the same in all samples. Characterization of prepared varistors was performed by X-ray diffraction, SEM and electrical measurements. It was shown that it is possible, in certain cases, to estimate additive redistribution taking into account changes in lattice constants of ZnO, spinel phases and varistor composition. Comparison of six different raristor mixtures shows that it is possible to reduce the number of components of the system if all main constituents of the varistor microstructure are still present. Results confirmed advantages of the DSCP method in preparation of varistors of required phase composition and properties.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Advanced Materials and Processes: Yucomat Ii",
title = "Influence of spinel phase composition on ZnO varistors properties",
pages = "232-225",
volume = "282-2",
doi = "10.4028/www.scientific.net/MSF.282-283.225"
}

Branković, Z., Poleti, D., Karanović, L. C.,& Uskoković, D.. (1998). Influence of spinel phase composition on ZnO varistors properties. in Advanced Materials and Processes: Yucomat Ii
Trans Tech Publications Ltd, Durnten-Zurich., 282-2, 225-232.
https://doi.org/10.4028/www.scientific.net/MSF.282-283.225

Branković Z, Poleti D, Karanović LC, Uskoković D. Influence of spinel phase composition on ZnO varistors properties. in Advanced Materials and Processes: Yucomat Ii. 1998;282-2:225-232.
doi:10.4028/www.scientific.net/MSF.282-283.225 .

Branković, Zorica, Poleti, Dejan, Karanović, Ljiljana C., Uskoković, D, "Influence of spinel phase composition on ZnO varistors properties" in Advanced Materials and Processes: Yucomat Ii, 282-2 (1998):225-232,
https://doi.org/10.4028/www.scientific.net/MSF.282-283.225 . .