TY  - CONF
AU  - Simović, Bojana
AU  - Zdravković, Jelena
AU  - Tasić, Nikola
AU  - Branković, Goran
AU  - Dapčević, Aleksandra
PY  - 2022
UR  - https://myepdic.huk.opalstacked.com/abstracts/299/
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1748
AB  - TiO2-based nanomaterials, such as titanium dioxide and layered titanates, are increasingly used in nanotechnology due to biological and photochemical stability, catalytic activity, non-toxicity and cost-effectiveness. In addition, it is known that some titanates can be used for humidity sensors regarding hydrophilic nature of their surface [1]. Nine TiO2-based products were obtained by the hydrothermal treatment of starting nanoanatase using NaOH solution (c = 5 mol cm–3) under different conditions (from 6 h at 110 °C to 18 h at 160 °C). Such optimization was necessary in order to obtain single sodium titanate phase allowing the testing of sensing properties but also long time waited distinction between titania and titanates in terms of structural and microstructural properties. The intensification of hydrothermal treatment notably increased the solubility of nanoanatase causing the phase and morphology transition from nearly spherical titania nanoparticles into elongated titanate nanosheets. According to XRPD and HRTEM/SAED, the single titanate phase was prepared after the most energy-intensive treatment, i.e. at 160 °C for 18 h. The Na0.4H1.6Ti2O5·H2O could be ascribed as its formula, based on EDS and TG. The phase composition and crystallite size were calculated in Jade software for all nine samples while unit cell parameters of single-phased sodium titanate were obtained by Rietveld refinement using FullProf software in Winplotr environment. The calculated unit cell parameters of sodium titanate, a = 18.16(7) Å, b = 3.754(7) Å, c = 2.99(1) Å, show the slight elongation along a‑axis comparing to H2Ti2O5·H2O (PDF card No. 47-0124) probably due to partial Na+–H+ ion exchange. The TG and FTIR analyses showed the hygroscopic nature of Na0.4H1.6Ti2O5·H2O nanosheets revealing the water adsorption on surface. Hence, the obtained Na0.4H1.6Ti2O5·H2O was for the first time used to produce a humidity sensor, which displayed remarkably rapid response and very fast recovery time.
PB  - European Powder Diffraction Conference (17 ; 2022 ; Šibenik)
C3  - European Powder Diffraction Conference -ЕPDIC17, Šibenik, Hrvatska
T1  - Structural transformation from titania nanoparticles to sodium titanate nanosheet exhibiting sensing properties
SP  - 123
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1748
ER  - 

@conference{
author = "Simović, Bojana and Zdravković, Jelena and Tasić, Nikola and Branković, Goran and Dapčević, Aleksandra",
year = "2022",
abstract = "TiO2-based nanomaterials, such as titanium dioxide and layered titanates, are increasingly used in nanotechnology due to biological and photochemical stability, catalytic activity, non-toxicity and cost-effectiveness. In addition, it is known that some titanates can be used for humidity sensors regarding hydrophilic nature of their surface [1]. Nine TiO2-based products were obtained by the hydrothermal treatment of starting nanoanatase using NaOH solution (c = 5 mol cm–3) under different conditions (from 6 h at 110 °C to 18 h at 160 °C). Such optimization was necessary in order to obtain single sodium titanate phase allowing the testing of sensing properties but also long time waited distinction between titania and titanates in terms of structural and microstructural properties. The intensification of hydrothermal treatment notably increased the solubility of nanoanatase causing the phase and morphology transition from nearly spherical titania nanoparticles into elongated titanate nanosheets. According to XRPD and HRTEM/SAED, the single titanate phase was prepared after the most energy-intensive treatment, i.e. at 160 °C for 18 h. The Na0.4H1.6Ti2O5·H2O could be ascribed as its formula, based on EDS and TG. The phase composition and crystallite size were calculated in Jade software for all nine samples while unit cell parameters of single-phased sodium titanate were obtained by Rietveld refinement using FullProf software in Winplotr environment. The calculated unit cell parameters of sodium titanate, a = 18.16(7) Å, b = 3.754(7) Å, c = 2.99(1) Å, show the slight elongation along a‑axis comparing to H2Ti2O5·H2O (PDF card No. 47-0124) probably due to partial Na+–H+ ion exchange. The TG and FTIR analyses showed the hygroscopic nature of Na0.4H1.6Ti2O5·H2O nanosheets revealing the water adsorption on surface. Hence, the obtained Na0.4H1.6Ti2O5·H2O was for the first time used to produce a humidity sensor, which displayed remarkably rapid response and very fast recovery time.",
publisher = "European Powder Diffraction Conference (17 ; 2022 ; Šibenik)",
journal = "European Powder Diffraction Conference -ЕPDIC17, Šibenik, Hrvatska",
title = "Structural transformation from titania nanoparticles to sodium titanate nanosheet exhibiting sensing properties",
pages = "123",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1748"
}

Simović, B., Zdravković, J., Tasić, N., Branković, G.,& Dapčević, A.. (2022). Structural transformation from titania nanoparticles to sodium titanate nanosheet exhibiting sensing properties. in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Hrvatska
European Powder Diffraction Conference (17 ; 2022 ; Šibenik)., 123.
https://hdl.handle.net/21.15107/rcub_rimsi_1748

Simović B, Zdravković J, Tasić N, Branković G, Dapčević A. Structural transformation from titania nanoparticles to sodium titanate nanosheet exhibiting sensing properties. in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Hrvatska. 2022;:123.
https://hdl.handle.net/21.15107/rcub_rimsi_1748 .

Simović, Bojana, Zdravković, Jelena, Tasić, Nikola, Branković, Goran, Dapčević, Aleksandra, "Structural transformation from titania nanoparticles to sodium titanate nanosheet exhibiting sensing properties" in European Powder Diffraction Conference -ЕPDIC17, Šibenik, Hrvatska (2022):123,
https://hdl.handle.net/21.15107/rcub_rimsi_1748 .

TY  - JOUR
AU  - Radovanović, Lidija
AU  - Zdravković, Jelena
AU  - Simović, Bojana
AU  - Radovanović, Zeljko
AU  - Mihajlovski, Katarina
AU  - Dramicanin, Miroslav D.
AU  - Rogan, Jelena
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1382
AB  - Zinc oxide (ZnO) nanoparticles were obtained by thermal decomposition of one-dimensional zinc-benzenepolycarboxylato complexes as single-sourceprecursors at 450 degrees C in an air atmosphere. The mechanism and kinetics of thermal degradation of zinc-benzenepolycarboxylato complexes were analyzed under non-isothermal conditions in an air atmosphere. The results of X-ray powder diffraction and field emission scanning electron microscopy revealed hexagonal wurtzite structure of ZnO with an average crystallite size in the range of 39-47 nm and similar morphology. The band gap and the specific surface area of ZnO nanoparticles were determined using UV-Vis diffuse reflectance spectroscopy and the Brunauer, Emmett and Teller method, respectively. The photoluminescent, photocatalytic and antimicrobial properties of the ZnO nanoparticles were also examined. The best photocatalytic activity in the degradation of C. I. Reactive Orange 16 dye was observed for the ZnO powder where the crystallites form the smallest agglomerates. All ZnO nanoparticles showed excellent inhibitory effect against Gram-positive bacterium Staphylococcus aureus and Gram-negative bacterium Escherichia coli.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Zinc oxide nanoparticles prepared by thermal decomposition of zinc benzenepolycarboxylato precursors: Photoluminescent, photocatalytic and antimicrobial properties
EP  - 1488
IS  - 11
SP  - 1475
VL  - 85
DO  - 10.2298/JSC200629048R
ER  - 

@article{
author = "Radovanović, Lidija and Zdravković, Jelena and Simović, Bojana and Radovanović, Zeljko and Mihajlovski, Katarina and Dramicanin, Miroslav D. and Rogan, Jelena",
year = "2020",
abstract = "Zinc oxide (ZnO) nanoparticles were obtained by thermal decomposition of one-dimensional zinc-benzenepolycarboxylato complexes as single-sourceprecursors at 450 degrees C in an air atmosphere. The mechanism and kinetics of thermal degradation of zinc-benzenepolycarboxylato complexes were analyzed under non-isothermal conditions in an air atmosphere. The results of X-ray powder diffraction and field emission scanning electron microscopy revealed hexagonal wurtzite structure of ZnO with an average crystallite size in the range of 39-47 nm and similar morphology. The band gap and the specific surface area of ZnO nanoparticles were determined using UV-Vis diffuse reflectance spectroscopy and the Brunauer, Emmett and Teller method, respectively. The photoluminescent, photocatalytic and antimicrobial properties of the ZnO nanoparticles were also examined. The best photocatalytic activity in the degradation of C. I. Reactive Orange 16 dye was observed for the ZnO powder where the crystallites form the smallest agglomerates. All ZnO nanoparticles showed excellent inhibitory effect against Gram-positive bacterium Staphylococcus aureus and Gram-negative bacterium Escherichia coli.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Zinc oxide nanoparticles prepared by thermal decomposition of zinc benzenepolycarboxylato precursors: Photoluminescent, photocatalytic and antimicrobial properties",
pages = "1488-1475",
number = "11",
volume = "85",
doi = "10.2298/JSC200629048R"
}

Radovanović, L., Zdravković, J., Simović, B., Radovanović, Z., Mihajlovski, K., Dramicanin, M. D.,& Rogan, J.. (2020). Zinc oxide nanoparticles prepared by thermal decomposition of zinc benzenepolycarboxylato precursors: Photoluminescent, photocatalytic and antimicrobial properties. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 85(11), 1475-1488.
https://doi.org/10.2298/JSC200629048R

Radovanović L, Zdravković J, Simović B, Radovanović Z, Mihajlovski K, Dramicanin MD, Rogan J. Zinc oxide nanoparticles prepared by thermal decomposition of zinc benzenepolycarboxylato precursors: Photoluminescent, photocatalytic and antimicrobial properties. in Journal of the Serbian Chemical Society. 2020;85(11):1475-1488.
doi:10.2298/JSC200629048R .

Radovanović, Lidija, Zdravković, Jelena, Simović, Bojana, Radovanović, Zeljko, Mihajlovski, Katarina, Dramicanin, Miroslav D., Rogan, Jelena, "Zinc oxide nanoparticles prepared by thermal decomposition of zinc benzenepolycarboxylato precursors: Photoluminescent, photocatalytic and antimicrobial properties" in Journal of the Serbian Chemical Society, 85, no. 11 (2020):1475-1488,
https://doi.org/10.2298/JSC200629048R . .

TY  - JOUR
AU  - Simović, Bojana
AU  - Dapčević, Aleksandra
AU  - Zdravković, Jelena
AU  - Tasić, Nikola
AU  - Kovac, Sabina
AU  - Krstic, Jugoslav
AU  - Branković, Goran
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1283
AB  - In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 hat 160 degrees C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions
EP  - 819
SP  - 810
VL  - 781
DO  - 10.1016/j.jallcom.2018.12.039
ER  - 

@article{
author = "Simović, Bojana and Dapčević, Aleksandra and Zdravković, Jelena and Tasić, Nikola and Kovac, Sabina and Krstic, Jugoslav and Branković, Goran",
year = "2019",
abstract = "In this work, nine products were prepared by modifying the experimental conditions (6, 12 and 18 hat 110, 135 and 160 degrees C) of hydrothermal treatment of starting nanoanatase in significantly less concentrated alkaline medium than usual in order to obtain a pure titanate phase. The nanocrystalline samples were characterized by XRPD, FESEM, HRTEM/SAED, EDS, TG, FT-IR, UV-Vis and BET analyses. The results revealed that the structure, texture, morphology and band gap energy of samples strongly depend on conditions of hydrothermal treatment. The intensification of hydrothermal treatment significantly increases the solubility of TiO2 promoting the changes in morphology from nearly spherical titania nanoparticles to elongated titanate nanosheets. The single titanate phase was obtained after energetically the most intensive treatment, i.e. 18 hat 160 degrees C. The step-by-step optimization was thus necessary to finally distinguish the titanates from titania in terms of structural and spectral properties and to finally allow the clarification of long-standing confusion between titania and titanates. The obtained single titanate phase was furtherly used to fabricate a humidity sensor, which showed remarkably rapid response and quick recovery time.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions",
pages = "819-810",
volume = "781",
doi = "10.1016/j.jallcom.2018.12.039"
}

Simović, B., Dapčević, A., Zdravković, J., Tasić, N., Kovac, S., Krstic, J.,& Branković, G.. (2019). From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 781, 810-819.
https://doi.org/10.1016/j.jallcom.2018.12.039

Simović B, Dapčević A, Zdravković J, Tasić N, Kovac S, Krstic J, Branković G. From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions. in Journal of Alloys and Compounds. 2019;781:810-819.
doi:10.1016/j.jallcom.2018.12.039 .

Simović, Bojana, Dapčević, Aleksandra, Zdravković, Jelena, Tasić, Nikola, Kovac, Sabina, Krstic, Jugoslav, Branković, Goran, "From titania to titanates: Phase and morphological transition in less alkaline medium under mild conditions" in Journal of Alloys and Compounds, 781 (2019):810-819,
https://doi.org/10.1016/j.jallcom.2018.12.039 . .

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  - 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 . .