TY  - JOUR
AU  - Dojčinović, Milena
AU  - Stojković Simatović, Ivana
AU  - Nikolić, Maria Vesna
PY  - 2024
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/3185
AB  - Ni foam is an extensively used current collector and substrate in investigations of electrochemically active materials such as supercapacitors and electrocatalysts for oxygen and hydrogen evolution reactions. This material is relatively cheap, porous, and conductive and has a large specific surface area, all of which make it a good substrate. We investigated Ni-Mg ferrites and NiMn2O4 as active materials for electrochemical energy storage. These materials, when loaded on Ni foam, gave promising capacitance values: 172 F/g (at 2 mV/s) for NiMn2O4 in 6 M KOH and 242 F/g (at 2 mV/s) for MgFe2O4 in 3 M KOH. Nevertheless, during the authors’ work, many experimental problems occurred. Inconsistencies in the results directed further investigation towards measuring the capacitance of the active materials using GCE and platinum electrodes as substrates to discover if Ni foam was the culprit of the inconsistencies. When non-nickel substrates were used, both NiMn2O4 and MgFe2O4 showed reduced capacitance. Experimental problems associated with the utilization of Ni foam as a substrate for active materials in supercapacitor electrodes are discussed here, combined with other problems already addressed in the scientific literature
PB  - MDPI
T2  - Materials
T1  - Supercapacitor electrodes: Is nickel foam the right substrate for active materials?
IS  - 6
SP  - 1292
VL  - 17
DO  - 10.3390/ma17061292
ER  - 

@article{
author = "Dojčinović, Milena and Stojković Simatović, Ivana and Nikolić, Maria Vesna",
year = "2024",
abstract = "Ni foam is an extensively used current collector and substrate in investigations of electrochemically active materials such as supercapacitors and electrocatalysts for oxygen and hydrogen evolution reactions. This material is relatively cheap, porous, and conductive and has a large specific surface area, all of which make it a good substrate. We investigated Ni-Mg ferrites and NiMn2O4 as active materials for electrochemical energy storage. These materials, when loaded on Ni foam, gave promising capacitance values: 172 F/g (at 2 mV/s) for NiMn2O4 in 6 M KOH and 242 F/g (at 2 mV/s) for MgFe2O4 in 3 M KOH. Nevertheless, during the authors’ work, many experimental problems occurred. Inconsistencies in the results directed further investigation towards measuring the capacitance of the active materials using GCE and platinum electrodes as substrates to discover if Ni foam was the culprit of the inconsistencies. When non-nickel substrates were used, both NiMn2O4 and MgFe2O4 showed reduced capacitance. Experimental problems associated with the utilization of Ni foam as a substrate for active materials in supercapacitor electrodes are discussed here, combined with other problems already addressed in the scientific literature",
publisher = "MDPI",
journal = "Materials",
title = "Supercapacitor electrodes: Is nickel foam the right substrate for active materials?",
number = "6",
pages = "1292",
volume = "17",
doi = "10.3390/ma17061292"
}

Dojčinović, M., Stojković Simatović, I.,& Nikolić, M. V.. (2024). Supercapacitor electrodes: Is nickel foam the right substrate for active materials?. in Materials
MDPI., 17(6), 1292.
https://doi.org/10.3390/ma17061292

Dojčinović M, Stojković Simatović I, Nikolić MV. Supercapacitor electrodes: Is nickel foam the right substrate for active materials?. in Materials. 2024;17(6):1292.
doi:10.3390/ma17061292 .

Dojčinović, Milena, Stojković Simatović, Ivana, Nikolić, Maria Vesna, "Supercapacitor electrodes: Is nickel foam the right substrate for active materials?" in Materials, 17, no. 6 (2024):1292,
https://doi.org/10.3390/ma17061292 . .

TY  - CONF
AU  - Dojčinović, Milena
AU  - Vasiljević, Zorka Z
AU  - Ribić, Vesna
AU  - Mravik, Željko
AU  - Stojković Simatović, Ivana
AU  - Nikolić, Maria Vesna
PY  - 2020
C3  - 71st Annual Meeting of the International Society of Electrochemistry
T1  - Use of FeMnO3 as a Catalyst in the Water Splitting Reaction
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_1552
ER  - 

@conference{
author = "Dojčinović, Milena and Vasiljević, Zorka Z and Ribić, Vesna and Mravik, Željko and Stojković Simatović, Ivana and Nikolić, Maria Vesna",
year = "2020",
journal = "71st Annual Meeting of the International Society of Electrochemistry",
title = "Use of FeMnO3 as a Catalyst in the Water Splitting Reaction",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_1552"
}

Dojčinović, M., Vasiljević, Z. Z., Ribić, V., Mravik, Ž., Stojković Simatović, I.,& Nikolić, M. V.. (2020). Use of FeMnO3 as a Catalyst in the Water Splitting Reaction. in 71st Annual Meeting of the International Society of Electrochemistry.
https://hdl.handle.net/21.15107/rcub_rimsi_1552

Dojčinović M, Vasiljević ZZ, Ribić V, Mravik Ž, Stojković Simatović I, Nikolić MV. Use of FeMnO3 as a Catalyst in the Water Splitting Reaction. in 71st Annual Meeting of the International Society of Electrochemistry. 2020;.
https://hdl.handle.net/21.15107/rcub_rimsi_1552 .

Dojčinović, Milena, Vasiljević, Zorka Z, Ribić, Vesna, Mravik, Željko, Stojković Simatović, Ivana, Nikolić, Maria Vesna, "Use of FeMnO3 as a Catalyst in the Water Splitting Reaction" in 71st Annual Meeting of the International Society of Electrochemistry (2020),
https://hdl.handle.net/21.15107/rcub_rimsi_1552 .

TY  - CONF
AU  - Dojčinović, Milena
AU  - Stojković Simatović, Ivana
AU  - Marković, Smilja
AU  - Janković Častvan, Ivona
AU  - Bajuk-Bogdanović, Danica
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Nikolić, Maria Vesna
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6998
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1626
AB  - Zinc oxide is a semiconductor material which still, after a century of scientific research, shows great potential in modern day utilisements such as heterogenous photocatalysis of organic pollutants and as a photoanode material for efficient water splitting and oxygen generation. In this work zinc oxide was synthesized by a glycine-nitrate combustion process, which is a cheap, simple and efficient method for synthesizing transition metal oxides. The obtained powder was calcined at 400 and 500 °C and samples were characterized in detail using X-ray powder diffraction (XRPD), Fourier-trasform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), photoluminescence spectroscopy (PL) and UV-Vis diffuse reflectance spectroscopy (DRS). Photoelectrocatalytic properties were investigated via electrochemical methods: linear voltammetry (LV), chronoamperometry (CA) and impedance spectroscopy (EIS). The results show that the obtained samples are nanocrystalline wurtzite zinc oxide with no impurities, with average particle diameters of 33 nm (annealed at 400 °C) and 48 nm (annealed at 500 °C). Both samples show significant amounts of various crystal deffects. The determined zinc oxide band gap was lower than the band gap of bulk zinc oxide. Photoelectrochemical measurements revealed that this material is photostable and reactive to light. Water oxidation is enhanced by exposing the light. Finally, photocatalytic properties were tested via determining kinetic parameters of organic pollutant decomposition. Both samples showed excellent photocatalytic activity by decomposing methylene blue and phenol.
PB  - Budapest : [s. n.]
C3  - Abstracts / International Workshop on Woman in Ceramic Science (WoCeram2019), April 7-9, 2019/ Budapest, Hungary, Novotel Danube Budapest
T1  - Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process
EP  - 16
SP  - 16
UR  - https://hdl.handle.net/21.15107/rcub_dais_6998
ER  - 

@conference{
author = "Dojčinović, Milena and Stojković Simatović, Ivana and Marković, Smilja and Janković Častvan, Ivona and Bajuk-Bogdanović, Danica and Stojadinović, Stevan and Rac, Vladislav and Nikolić, Maria Vesna",
year = "2019",
abstract = "Zinc oxide is a semiconductor material which still, after a century of scientific research, shows great potential in modern day utilisements such as heterogenous photocatalysis of organic pollutants and as a photoanode material for efficient water splitting and oxygen generation. In this work zinc oxide was synthesized by a glycine-nitrate combustion process, which is a cheap, simple and efficient method for synthesizing transition metal oxides. The obtained powder was calcined at 400 and 500 °C and samples were characterized in detail using X-ray powder diffraction (XRPD), Fourier-trasform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), photoluminescence spectroscopy (PL) and UV-Vis diffuse reflectance spectroscopy (DRS). Photoelectrocatalytic properties were investigated via electrochemical methods: linear voltammetry (LV), chronoamperometry (CA) and impedance spectroscopy (EIS). The results show that the obtained samples are nanocrystalline wurtzite zinc oxide with no impurities, with average particle diameters of 33 nm (annealed at 400 °C) and 48 nm (annealed at 500 °C). Both samples show significant amounts of various crystal deffects. The determined zinc oxide band gap was lower than the band gap of bulk zinc oxide. Photoelectrochemical measurements revealed that this material is photostable and reactive to light. Water oxidation is enhanced by exposing the light. Finally, photocatalytic properties were tested via determining kinetic parameters of organic pollutant decomposition. Both samples showed excellent photocatalytic activity by decomposing methylene blue and phenol.",
publisher = "Budapest : [s. n.]",
journal = "Abstracts / International Workshop on Woman in Ceramic Science (WoCeram2019), April 7-9, 2019/ Budapest, Hungary, Novotel Danube Budapest",
title = "Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process",
pages = "16-16",
url = "https://hdl.handle.net/21.15107/rcub_dais_6998"
}

Dojčinović, M., Stojković Simatović, I., Marković, S., Janković Častvan, I., Bajuk-Bogdanović, D., Stojadinović, S., Rac, V.,& Nikolić, M. V.. (2019). Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process. in Abstracts / International Workshop on Woman in Ceramic Science (WoCeram2019), April 7-9, 2019/ Budapest, Hungary, Novotel Danube Budapest
Budapest : [s. n.]., 16-16.
https://hdl.handle.net/21.15107/rcub_dais_6998

Dojčinović M, Stojković Simatović I, Marković S, Janković Častvan I, Bajuk-Bogdanović D, Stojadinović S, Rac V, Nikolić MV. Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process. in Abstracts / International Workshop on Woman in Ceramic Science (WoCeram2019), April 7-9, 2019/ Budapest, Hungary, Novotel Danube Budapest. 2019;:16-16.
https://hdl.handle.net/21.15107/rcub_dais_6998 .

Dojčinović, Milena, Stojković Simatović, Ivana, Marković, Smilja, Janković Častvan, Ivona, Bajuk-Bogdanović, Danica, Stojadinović, Stevan, Rac, Vladislav, Nikolić, Maria Vesna, "Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process" in Abstracts / International Workshop on Woman in Ceramic Science (WoCeram2019), April 7-9, 2019/ Budapest, Hungary, Novotel Danube Budapest (2019):16-16,
https://hdl.handle.net/21.15107/rcub_dais_6998 .

TY  - JOUR
AU  - Marković, Smilja
AU  - Stojkovic-Simatović, Ivana
AU  - Ahmetović, Sanita
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Skapin, Sreco Davor
AU  - Bajuk-Bogdanović, Danica
AU  - Jankovic-Castvan, Ivona
AU  - Uskoković, Dragan
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1234
AB  - ZnO nanopowders were produced using microwave processing of a precipitate and applied as a photoanode for photoelectrochemical water splitting. Two different surfactants, cetyltrimethylammonium bromide (CTAB) as the cationic and Pluronic F127 as the non-ionic one, were employed to in situ adjust the surface-to-bulk defect ratio in the ZnO crystal structure and further to modify the photo(electro)catalytic activity of the ZnO photoanode. The crystal structure, morphological, textural, optical and photo(electro)catalytic properties of ZnO particles were studied in detail to explain the profound effects of the surfactants on the photoanode activity. The ZnO/CTAB photoanode displayed the highest photocurrent density of 27 mA g(-1), compared to ZnO (10.4 mA g(-1)) and ZnO/F127 photoanodes (20 mA g(-1)) at 1.5 V vs. SCE in 0.1 M Na2SO4 under visible illumination of 90 mW cm(-2). A significant shift of the overpotential toward lower values was also observed when photoanodes were illuminated. The highest shift of the overpotential, from 1.296 to 0.248 V vs. SCE, was recorded when the ZnO/CTAB photanode was illuminated. The ZnO/CTAB photoanode provides efficient charge transfer across the electrode/electrolyte interface, with a longer lifetime of photogenerated electron-hole pairs and reduced possibility of charge recombination. The photoconversion efficiency was improved from 1.4% for ZnO and 0.9% for ZnO/F127 to 4.2% for ZnO/CTAB at 0.510 mV. A simple procedure for the synthesis of ZnO particles with improved photo(electro)catalytic properties was established and it was found that even a small amount of CTAB used during processing of ZnO increases the surface-to-bulk defect ratio. Optimization of the surface-to-bulk defect ratio in ZnO materials enables increase of the absorption capacity for visible light, rendering of the recombination rate of the photogenerated pair, as well as increase of both the photocurrent density and photoconversion efficiency.
PB  - Royal Soc Chemistry, Cambridge
T2  - RSC Advances
T1  - Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties
EP  - 17178
IS  - 30
SP  - 17165
VL  - 9
DO  - 10.1039/c9ra02553g
ER  - 

@article{
author = "Marković, Smilja and Stojkovic-Simatović, Ivana and Ahmetović, Sanita and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Skapin, Sreco Davor and Bajuk-Bogdanović, Danica and Jankovic-Castvan, Ivona and Uskoković, Dragan",
year = "2019",
abstract = "ZnO nanopowders were produced using microwave processing of a precipitate and applied as a photoanode for photoelectrochemical water splitting. Two different surfactants, cetyltrimethylammonium bromide (CTAB) as the cationic and Pluronic F127 as the non-ionic one, were employed to in situ adjust the surface-to-bulk defect ratio in the ZnO crystal structure and further to modify the photo(electro)catalytic activity of the ZnO photoanode. The crystal structure, morphological, textural, optical and photo(electro)catalytic properties of ZnO particles were studied in detail to explain the profound effects of the surfactants on the photoanode activity. The ZnO/CTAB photoanode displayed the highest photocurrent density of 27 mA g(-1), compared to ZnO (10.4 mA g(-1)) and ZnO/F127 photoanodes (20 mA g(-1)) at 1.5 V vs. SCE in 0.1 M Na2SO4 under visible illumination of 90 mW cm(-2). A significant shift of the overpotential toward lower values was also observed when photoanodes were illuminated. The highest shift of the overpotential, from 1.296 to 0.248 V vs. SCE, was recorded when the ZnO/CTAB photanode was illuminated. The ZnO/CTAB photoanode provides efficient charge transfer across the electrode/electrolyte interface, with a longer lifetime of photogenerated electron-hole pairs and reduced possibility of charge recombination. The photoconversion efficiency was improved from 1.4% for ZnO and 0.9% for ZnO/F127 to 4.2% for ZnO/CTAB at 0.510 mV. A simple procedure for the synthesis of ZnO particles with improved photo(electro)catalytic properties was established and it was found that even a small amount of CTAB used during processing of ZnO increases the surface-to-bulk defect ratio. Optimization of the surface-to-bulk defect ratio in ZnO materials enables increase of the absorption capacity for visible light, rendering of the recombination rate of the photogenerated pair, as well as increase of both the photocurrent density and photoconversion efficiency.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "RSC Advances",
title = "Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties",
pages = "17178-17165",
number = "30",
volume = "9",
doi = "10.1039/c9ra02553g"
}

Marković, S., Stojkovic-Simatović, I., Ahmetović, S., Veselinović, L., Stojadinović, S., Rac, V., Skapin, S. D., Bajuk-Bogdanović, D., Jankovic-Castvan, I.,& Uskoković, D.. (2019). Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties. in RSC Advances
Royal Soc Chemistry, Cambridge., 9(30), 17165-17178.
https://doi.org/10.1039/c9ra02553g

Marković S, Stojkovic-Simatović I, Ahmetović S, Veselinović L, Stojadinović S, Rac V, Skapin SD, Bajuk-Bogdanović D, Jankovic-Castvan I, Uskoković D. Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties. in RSC Advances. 2019;9(30):17165-17178.
doi:10.1039/c9ra02553g .

Marković, Smilja, Stojkovic-Simatović, Ivana, Ahmetović, Sanita, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Skapin, Sreco Davor, Bajuk-Bogdanović, Danica, Jankovic-Castvan, Ivona, Uskoković, Dragan, "Surfactant-assisted microwave processing of ZnO particles: a simple way for designing the surface-to-bulk defect ratio and improving photo(electro)catalytic properties" in RSC Advances, 9, no. 30 (2019):17165-17178,
https://doi.org/10.1039/c9ra02553g . .

TY  - CONF
AU  - Marković, Smilja
AU  - Stojković Simatović, Ivana
AU  - Ahmetović, Sanita
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2970
AB  - Zinc oxide-based materials have a great potential to be applied as photocatalysts in the processes
of removal of organic and biological pollutants from drinking and wastewaters. A major
drawback of ZnO as visible-light absorber is a band energy gap of 3.37 eV, which restricts the
material to absorb UV light only. This drawback can be overcame by modifying the optical
absorption properties of zinc oxide particles. Different approaches have been applied to modify
the visible light photocatalytic activity of ZnO materials: (1) metal and nonmetal ion doping, (2)
hydrogenation, (3) the incorporation of crystalline defects in the form of vacancies and
interstitials, (4) the modification of particles morphology and surface topology, etc.
In this study we investigated the influence of different surfactants on the morphology, optical
properties and functionality of ZnO particles. Two different surfactants were employed during
microwave processing of ZnO particles, cetyltrimethylammonium bromide (CTAB) as cationic
and Pluronic F-127 as non-ionic one. The crystal structure and phase purity of the ZnO particles
were determined by X-ray diffraction and Raman spectroscopy. Effects of the surfactants on
particles morphology and texture properties were observed with field emission scanning electron
microscopy (FE–SEM) and nitrogen adsorption–desorption isotherm, respectively. The optical
properties were studied using UV–Vis diffuse reflectance and photoluminescence (PL)
spectroscopy. Functionality of ZnO particles was studied due to their photocatalytic and
electrochemical activities. Photocatalytic activity was examined via decolorization of methylene
blue under direct sunlight irradiation. Electrochemical behavior of the ZnO samples as anode
material was evaluated by linear sweep voltammetry in Na2SO4
 electrolyte; the oxygen evolution
kinetics were determined and compared.
PB  - Materials Research Society of Serbia Knez Mihailova 35/IV, P.O.Box 433, 11000 Belgrade, Serbia
C3  - Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
T1  - CTAB- and pluronic F-127-assisted microwave processing of ZnO particles with modified morphology and optical properties
SP  - 70/O.S.II.9
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2970
ER  - 

@conference{
author = "Marković, Smilja and Stojković Simatović, Ivana and Ahmetović, Sanita and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2018",
abstract = "Zinc oxide-based materials have a great potential to be applied as photocatalysts in the processes
of removal of organic and biological pollutants from drinking and wastewaters. A major
drawback of ZnO as visible-light absorber is a band energy gap of 3.37 eV, which restricts the
material to absorb UV light only. This drawback can be overcame by modifying the optical
absorption properties of zinc oxide particles. Different approaches have been applied to modify
the visible light photocatalytic activity of ZnO materials: (1) metal and nonmetal ion doping, (2)
hydrogenation, (3) the incorporation of crystalline defects in the form of vacancies and
interstitials, (4) the modification of particles morphology and surface topology, etc.
In this study we investigated the influence of different surfactants on the morphology, optical
properties and functionality of ZnO particles. Two different surfactants were employed during
microwave processing of ZnO particles, cetyltrimethylammonium bromide (CTAB) as cationic
and Pluronic F-127 as non-ionic one. The crystal structure and phase purity of the ZnO particles
were determined by X-ray diffraction and Raman spectroscopy. Effects of the surfactants on
particles morphology and texture properties were observed with field emission scanning electron
microscopy (FE–SEM) and nitrogen adsorption–desorption isotherm, respectively. The optical
properties were studied using UV–Vis diffuse reflectance and photoluminescence (PL)
spectroscopy. Functionality of ZnO particles was studied due to their photocatalytic and
electrochemical activities. Photocatalytic activity was examined via decolorization of methylene
blue under direct sunlight irradiation. Electrochemical behavior of the ZnO samples as anode
material was evaluated by linear sweep voltammetry in Na2SO4
 electrolyte; the oxygen evolution
kinetics were determined and compared.",
publisher = "Materials Research Society of Serbia Knez Mihailova 35/IV, P.O.Box 433, 11000 Belgrade, Serbia",
journal = "Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018",
title = "CTAB- and pluronic F-127-assisted microwave processing of ZnO particles with modified morphology and optical properties",
pages = "70/O.S.II.9",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2970"
}

Marković, S., Stojković Simatović, I., Ahmetović, S., Veselinović, L., Stojadinović, S., Rac, V., Škapin, S. D.,& Uskoković, D.. (2018). CTAB- and pluronic F-127-assisted microwave processing of ZnO particles with modified morphology and optical properties. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018
Materials Research Society of Serbia Knez Mihailova 35/IV, P.O.Box 433, 11000 Belgrade, Serbia., 70/O.S.II.9.
https://hdl.handle.net/21.15107/rcub_rimsi_2970

Marković S, Stojković Simatović I, Ahmetović S, Veselinović L, Stojadinović S, Rac V, Škapin SD, Uskoković D. CTAB- and pluronic F-127-assisted microwave processing of ZnO particles with modified morphology and optical properties. in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018. 2018;:70/O.S.II.9.
https://hdl.handle.net/21.15107/rcub_rimsi_2970 .

Marković, Smilja, Stojković Simatović, Ivana, Ahmetović, Sanita, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Škapin, Srečo Davor, Uskoković, Dragan, "CTAB- and pluronic F-127-assisted microwave processing of ZnO particles with modified morphology and optical properties" in Programme and The Book of Abstracts / Twentieth Annual Conference YUCOMAT 2018, Herceg Novi, September 3-7, 2018 (2018):70/O.S.II.9,
https://hdl.handle.net/21.15107/rcub_rimsi_2970 .

TY  - CONF
AU  - Ahmetović, Sanita
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Škapin, Srečo Davor
AU  - Stojković Simatović, Ivana
AU  - Marković, Smilja
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2871
AB  - Due to its optical and electrical properties, low toxicity, chemical and physical stability, as
well as inexpensiveness, zinc oxide (ZnO) based materials have a great potential to be used
as photoelectrode in photo(electro)catalysis. Photo(electro)catalytic activity of ZnO materials
can be improved by modification of particles morphology and surface topology.
In this work, the influence of two different surfactants: cetyltrimethylammonium bromide
(CTAB) and Pluronic F-127, on the crystal structure, morphology, optical and
photo(electro)catalytic properties of ZnO particles, were examined. ZnO powders were
synthesized by microwave processing of a precipitate which was previously prepared by
"drop by drop" method in the presence of the surfactants. The crystal structure and phase
purity of the ZnO particles were determined by X-ray diffraction and Raman spectroscopy.
The effects of the surfactants on ZnO particles morphology were examined by the field
emission scanning electron microscopy (FE-SEM). The optical properties were studied using
UV-Vis diffuse reflectance and photoluminescence spectroscopy. Photocatalytic activity was
examined via decolorization of methylene blue under direct sunlight irradiation. It was found
that synthesized ZnO powders have a significant photocatalytic activity. Electrochemical
properties were studied using linear sweep voltammetry and impedance spectroscopy in
Na2SO4 electrolyte. ZnO powder synthesized in the presence of CTAB (ZnO/CTAB) showed
the most significant reduction of potential and the fastest kinetic of oxygen evolution.
PB  - Institute of Technical Sciences of SASA Knez Mihailova 35/IV, 11000 Belgrade, Serbia
C3  - Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia, 2018, 66-66
T1  - Structural, morphological and optical characteristics of ZnO particles synthesized in the presence of surfactants CTAB and Pluronic F-127
SP  - 66/10-2
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2871
ER  - 

@conference{
author = "Ahmetović, Sanita and Stojadinović, Stevan and Rac, Vladislav and Škapin, Srečo Davor and Stojković Simatović, Ivana and Marković, Smilja",
year = "2018",
abstract = "Due to its optical and electrical properties, low toxicity, chemical and physical stability, as
well as inexpensiveness, zinc oxide (ZnO) based materials have a great potential to be used
as photoelectrode in photo(electro)catalysis. Photo(electro)catalytic activity of ZnO materials
can be improved by modification of particles morphology and surface topology.
In this work, the influence of two different surfactants: cetyltrimethylammonium bromide
(CTAB) and Pluronic F-127, on the crystal structure, morphology, optical and
photo(electro)catalytic properties of ZnO particles, were examined. ZnO powders were
synthesized by microwave processing of a precipitate which was previously prepared by
"drop by drop" method in the presence of the surfactants. The crystal structure and phase
purity of the ZnO particles were determined by X-ray diffraction and Raman spectroscopy.
The effects of the surfactants on ZnO particles morphology were examined by the field
emission scanning electron microscopy (FE-SEM). The optical properties were studied using
UV-Vis diffuse reflectance and photoluminescence spectroscopy. Photocatalytic activity was
examined via decolorization of methylene blue under direct sunlight irradiation. It was found
that synthesized ZnO powders have a significant photocatalytic activity. Electrochemical
properties were studied using linear sweep voltammetry and impedance spectroscopy in
Na2SO4 electrolyte. ZnO powder synthesized in the presence of CTAB (ZnO/CTAB) showed
the most significant reduction of potential and the fastest kinetic of oxygen evolution.",
publisher = "Institute of Technical Sciences of SASA Knez Mihailova 35/IV, 11000 Belgrade, Serbia",
journal = "Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia, 2018, 66-66",
title = "Structural, morphological and optical characteristics of ZnO particles synthesized in the presence of surfactants CTAB and Pluronic F-127",
pages = "66/10-2",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2871"
}

Ahmetović, S., Stojadinović, S., Rac, V., Škapin, S. D., Stojković Simatović, I.,& Marković, S.. (2018). Structural, morphological and optical characteristics of ZnO particles synthesized in the presence of surfactants CTAB and Pluronic F-127. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia, 2018, 66-66
Institute of Technical Sciences of SASA Knez Mihailova 35/IV, 11000 Belgrade, Serbia., 66/10-2.
https://hdl.handle.net/21.15107/rcub_rimsi_2871

Ahmetović S, Stojadinović S, Rac V, Škapin SD, Stojković Simatović I, Marković S. Structural, morphological and optical characteristics of ZnO particles synthesized in the presence of surfactants CTAB and Pluronic F-127. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia, 2018, 66-66. 2018;:66/10-2.
https://hdl.handle.net/21.15107/rcub_rimsi_2871 .

Ahmetović, Sanita, Stojadinović, Stevan, Rac, Vladislav, Škapin, Srečo Davor, Stojković Simatović, Ivana, Marković, Smilja, "Structural, morphological and optical characteristics of ZnO particles synthesized in the presence of surfactants CTAB and Pluronic F-127" in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia, 2018, 66-66 (2018):66/10-2,
https://hdl.handle.net/21.15107/rcub_rimsi_2871 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stojković Simatović, Ivana
AU  - Ahmetović, Sanita
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2891
AB  - ZnO/CTAB powder was prepared by microwave processing of a precipitate 
with the aid of cetyltrimethylammonium bromide (CTAB). The effects of 
CTAB on the crystal structure, morphology, optical and 
photo(electro)catalytic properties of ZnO particles were studied. The results 
showed that CTAB did not influenced crystal structure or phase purity of 
ZnO. However, even low concentration of CTAB vary particles morphology; 
cone-like particles were prepared by processing without CTAB, while a 
mixture of spheroidal and plate-like ZnO particles were produced when 0.001 
M CTAB was used. It was found that synthesized ZnO powders have 0.10 
eV lower band gap energy then bulk ZnO (3.37 eV). A high photocatalytic 
activity for decolorization of methylene blue water solution was established 
after 2 h of sunlight irradiation; efficiency was 100 and 67% for ZnO/CTAB 
and ZnO, respectively. Electrochemical test showed faster oxygen evolution 
kinetics when ZnO/CTAB was used as anode material. Enhanced 
photo(electro)catalytic activities of ZnO/CTAB particles are attributed to 
better absorption of visible light due to both, larger dimensions and surface 
sensitization by CTAB.
PB  - Society of Physical Chemists of Serbia, Studentski Trg 12-16,  11158, Belgrade, Serbia
C3  - Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade
T1  - Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing
EP  - 240
SP  - 237/C-17-P
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2891
ER  - 

@conference{
author = "Marković, Smilja and Stojković Simatović, Ivana and Ahmetović, Sanita and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2018",
abstract = "ZnO/CTAB powder was prepared by microwave processing of a precipitate 
with the aid of cetyltrimethylammonium bromide (CTAB). The effects of 
CTAB on the crystal structure, morphology, optical and 
photo(electro)catalytic properties of ZnO particles were studied. The results 
showed that CTAB did not influenced crystal structure or phase purity of 
ZnO. However, even low concentration of CTAB vary particles morphology; 
cone-like particles were prepared by processing without CTAB, while a 
mixture of spheroidal and plate-like ZnO particles were produced when 0.001 
M CTAB was used. It was found that synthesized ZnO powders have 0.10 
eV lower band gap energy then bulk ZnO (3.37 eV). A high photocatalytic 
activity for decolorization of methylene blue water solution was established 
after 2 h of sunlight irradiation; efficiency was 100 and 67% for ZnO/CTAB 
and ZnO, respectively. Electrochemical test showed faster oxygen evolution 
kinetics when ZnO/CTAB was used as anode material. Enhanced 
photo(electro)catalytic activities of ZnO/CTAB particles are attributed to 
better absorption of visible light due to both, larger dimensions and surface 
sensitization by CTAB.",
publisher = "Society of Physical Chemists of Serbia, Studentski Trg 12-16,  11158, Belgrade, Serbia",
journal = "Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade",
title = "Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing",
pages = "240-237/C-17-P",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2891"
}

Marković, S., Stojković Simatović, I., Ahmetović, S., Veselinović, L., Stojadinović, S., Rac, V., Škapin, S. D.,& Uskoković, D.. (2018). Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing. in Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade
Society of Physical Chemists of Serbia, Studentski Trg 12-16,  11158, Belgrade, Serbia., 237/C-17-P-240.
https://hdl.handle.net/21.15107/rcub_rimsi_2891

Marković S, Stojković Simatović I, Ahmetović S, Veselinović L, Stojadinović S, Rac V, Škapin SD, Uskoković D. Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing. in Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade. 2018;:237/C-17-P-240.
https://hdl.handle.net/21.15107/rcub_rimsi_2891 .

Marković, Smilja, Stojković Simatović, Ivana, Ahmetović, Sanita, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Škapin, Srečo Davor, Uskoković, Dragan, "Enhanced photo(electro)catalytic properties of ZnO particles synthesized by CTAB-assisted microwave processing" in Physical Chemistry 2018 : proceedings. Vol. 1 / 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, September 24-28, 2018, Belgrade (2018):237/C-17-P-240,
https://hdl.handle.net/21.15107/rcub_rimsi_2891 .

TY  - CONF
AU  - Dojčinović, Milena
AU  - Marković, Smilja
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Janković Častvan, Ivona
AU  - Stojković Simatović, Ivana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4717
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1629
AB  - One of the ways to get rid of toxic organic compounds that industries release into natural waters is photocatalysis of the decomposition of organic compounds on the surface of heterogenous photocatalysts such as zinc oxide. Zinc oxide is a semiconductor that interacts with UV and near-UV visible light by generating electron-hole pairs which decompose organic molecules. Therefore it is useful to explore different ways of synthesizing zinc oxide and to test quality and quantity of organic decomposition photocatalysis so as to enable the commercial use of the material. Zinc oxide is also a respectable material for use as a photoelectrocatalyst in water oxidation, for example, which can be useful for generating oxygen while using natural sunlight - a clean and abundant energy source. In this project nanocrystalline zinc oxide was synthesized by glycin-nitrate combustion process and the powder was annealed on temperatures of 400 °C and 500 °C. Obtained particles where characterized in detail using X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning microscopy (FESEM), photoluminescence spectroscopy (PL) and diffuse reflectance spectroscopy (DRS). The results show that obtained samples are nanocrystalline wurtzite zinc oxide, with particle diameters of 33 nm (annealed at 400 °C) ad 48 nm (annealed at 500 °C). Both samples show significant amount of various crystal defects. Zinc oxide band gap of the samples are determined to be lower than the band gap of the bulk zinc oxide. Photoelectrocatalytic properties were investigated via electrochemical methods: linear voltammetry (LV), chronoamperometry (CA) and impedance spectroscopy (EIS). The results show that material is photostable and reactive to the light. Water oxidation is enhanced by exposing to sunlight. Finally, photocatalytic properties are tested with determining kinetic parameters of phenole and methyl blue decomposition. Zinc oxide nanoparticles are efficient photocatalysts, although sample annealed at 500 °C shows better properties than sample annealed at 400 °C.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia
T1  - Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process
EP  - 78
SP  - 78
UR  - https://hdl.handle.net/21.15107/rcub_dais_4717
ER  - 

@conference{
author = "Dojčinović, Milena and Marković, Smilja and Stojadinović, Stevan and Rac, Vladislav and Janković Častvan, Ivona and Stojković Simatović, Ivana",
year = "2018",
abstract = "One of the ways to get rid of toxic organic compounds that industries release into natural waters is photocatalysis of the decomposition of organic compounds on the surface of heterogenous photocatalysts such as zinc oxide. Zinc oxide is a semiconductor that interacts with UV and near-UV visible light by generating electron-hole pairs which decompose organic molecules. Therefore it is useful to explore different ways of synthesizing zinc oxide and to test quality and quantity of organic decomposition photocatalysis so as to enable the commercial use of the material. Zinc oxide is also a respectable material for use as a photoelectrocatalyst in water oxidation, for example, which can be useful for generating oxygen while using natural sunlight - a clean and abundant energy source. In this project nanocrystalline zinc oxide was synthesized by glycin-nitrate combustion process and the powder was annealed on temperatures of 400 °C and 500 °C. Obtained particles where characterized in detail using X-ray powder diffraction (XRPD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, field emission scanning microscopy (FESEM), photoluminescence spectroscopy (PL) and diffuse reflectance spectroscopy (DRS). The results show that obtained samples are nanocrystalline wurtzite zinc oxide, with particle diameters of 33 nm (annealed at 400 °C) ad 48 nm (annealed at 500 °C). Both samples show significant amount of various crystal defects. Zinc oxide band gap of the samples are determined to be lower than the band gap of the bulk zinc oxide. Photoelectrocatalytic properties were investigated via electrochemical methods: linear voltammetry (LV), chronoamperometry (CA) and impedance spectroscopy (EIS). The results show that material is photostable and reactive to the light. Water oxidation is enhanced by exposing to sunlight. Finally, photocatalytic properties are tested with determining kinetic parameters of phenole and methyl blue decomposition. Zinc oxide nanoparticles are efficient photocatalysts, although sample annealed at 500 °C shows better properties than sample annealed at 400 °C.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia",
title = "Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process",
pages = "78-78",
url = "https://hdl.handle.net/21.15107/rcub_dais_4717"
}

Dojčinović, M., Marković, S., Stojadinović, S., Rac, V., Janković Častvan, I.,& Stojković Simatović, I.. (2018). Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 78-78.
https://hdl.handle.net/21.15107/rcub_dais_4717

Dojčinović M, Marković S, Stojadinović S, Rac V, Janković Častvan I, Stojković Simatović I. Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia. 2018;:78-78.
https://hdl.handle.net/21.15107/rcub_dais_4717 .

Dojčinović, Milena, Marković, Smilja, Stojadinović, Stevan, Rac, Vladislav, Janković Častvan, Ivona, Stojković Simatović, Ivana, "Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process" in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and Engineering, December 5-7, 2018, Belgrade, Serbia (2018):78-78,
https://hdl.handle.net/21.15107/rcub_dais_4717 .