Janković Častvan, Ivona

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  • Janković Častvan, Ivona (5)
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Author's Bibliography

Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents

Milojkov, Dušan; Radosavljević-Mihajlović, Ana S; Stanić, Vojislav Dj; Nastasijević, Branislav; Radotić, Ksenija; Janković Častvan, Ivona; Živković-Radovanović, Vukosava

(Elsevier, 2023)

TY  - JOUR
AU  - Milojkov, Dušan
AU  - Radosavljević-Mihajlović, Ana S
AU  - Stanić, Vojislav Dj
AU  - Nastasijević, Branislav
AU  - Radotić, Ksenija
AU  - Janković Častvan, Ivona
AU  - Živković-Radovanović, Vukosava
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2649
AB  - Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential
next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized
by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible
properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate
the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images
confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis
shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure.
Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal
lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence
in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and
Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic
action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample
in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three
species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium
growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of
Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F�����
ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples
were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–
spectrum antimicrobial agents for various biomedical and health care preparations.
PB  - Elsevier
T2  - Journal of Photochemistry & Photobiology, B: Biology
T1  - Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents
SP  - 112649
VL  - 239
DO  - 10.1016/j.jphotobiol.2023.112649
ER  - 
@article{
author = "Milojkov, Dušan and Radosavljević-Mihajlović, Ana S and Stanić, Vojislav Dj and Nastasijević, Branislav and Radotić, Ksenija and Janković Častvan, Ivona and Živković-Radovanović, Vukosava",
year = "2023",
abstract = "Nanomaterials based on metal–doped fluorapatite (FAP) have attracted considerable interest as potential
next–generation antimicrobial agents. In this study, Cu2+–doped FAP nanocrystals have been successfully synthesized
by a neutralization method at room temperature. Their structural, optical, antimicrobial, and hemcompatible
properties have been investigated. XRD, FTIR, FESEM, and N2 adsorption–desorption studies indicate
the formation of single–phase FAP mesoporous nanopowders, composed of rod–like particles. TEM images
confirmed the formation of nanorodes with a length of 60 nm and a width of about 18 nm. Rietveld analysis
shows that the Cu2+ ions preferentially substitute Ca2 (6 h) sites in the hexagonal fluorapatite crystal structure.
Fluorescence spectroscopy accompanied by MCR–ALS method confirms substitution of Cu2+ ions in FAP crystal
lattice with extracting additional d–d band transition at green color from FAP broadband self–activated luminescence
in violet–blue color. Antimicrobial studies conducted on Staphylococcus aureus, Escherichia coli and
Micrococcus lysodeikticus showed that FAP nanopowder with the highest Cu2+ content have strong bacteriostatic
action on Staphylococcus aureus bacterial strain in mediums containing nutrition matters. In addition, this sample
in comparison to pure FAP achieved a high percentage of relative reduction of bacterial population for all three
species, being >90% in most cases. Fungistatic action is noticed too, throwgh the slowing down mycelium
growth of fungus Aspergillus niger, Aspergillus flavus and Penicillium roqueforti and reduction of sporulation of
Aspergillus niger species. Cu2+–doped FAP nanocrystals shows a synergistic antimicrobial effect with Cu2+ and F�����
ions. Concerning the potential biomedical applications, the hemolysis ratios of the Cu2+–doped FAP samples
were below 5%. The obtained results pointed out the possible use of the synthesized nanocrystals as broad–
spectrum antimicrobial agents for various biomedical and health care preparations.",
publisher = "Elsevier",
journal = "Journal of Photochemistry & Photobiology, B: Biology",
title = "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents",
pages = "112649",
volume = "239",
doi = "10.1016/j.jphotobiol.2023.112649"
}
Milojkov, D., Radosavljević-Mihajlović, A. S., Stanić, V. D., Nastasijević, B., Radotić, K., Janković Častvan, I.,& Živković-Radovanović, V.. (2023). Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry & Photobiology, B: Biology
Elsevier., 239, 112649.
https://doi.org/10.1016/j.jphotobiol.2023.112649
Milojkov D, Radosavljević-Mihajlović AS, Stanić VD, Nastasijević B, Radotić K, Janković Častvan I, Živković-Radovanović V. Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents. in Journal of Photochemistry & Photobiology, B: Biology. 2023;239:112649.
doi:10.1016/j.jphotobiol.2023.112649 .
Milojkov, Dušan, Radosavljević-Mihajlović, Ana S, Stanić, Vojislav Dj, Nastasijević, Branislav, Radotić, Ksenija, Janković Častvan, Ivona, Živković-Radovanović, Vukosava, "Synthesis and characterization of luminescent Cu2+–doped fluorapatite nanocrystals as potential broad–spectrum antimicrobial agents" in Journal of Photochemistry & Photobiology, B: Biology, 239 (2023):112649,
https://doi.org/10.1016/j.jphotobiol.2023.112649 . .
2

Structure and photocatalytic properties of sol-gel synthesized pseudobrookite

Vasiljević, Zorka Z; Dojčinović, Milena; Janković Častvan, Ivona; Vujančević, Jelena; Tadić, Nenad B.; Nikolić, Maria Vesna

(Novi Sad : Faculty of Technology, 2019)

TY  - CONF
AU  - Vasiljević, Zorka Z
AU  - Dojčinović, Milena
AU  - Janković Častvan, Ivona
AU  - Vujančević, Jelena
AU  - Tadić, Nenad B.
AU  - Nikolić, Maria Vesna
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6988
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1627
AB  - Fe2TiO5 nanopartcles were synthesized by modified sol-gel method with aid ofFe(NO3)3 9H2O and Ti(OC3H7)4 as starting reagents, oxalic acid as chilate agent and cetyltrimethylammonium bromide as surfactant. The aim of this study was to asses the photocatalytic degradaton of the antibiotic Oxytetracycline (OTC) using visible light irradiation. As prepared nanoparticles were characterized by XRD, BET, FESEM and UV-vis DRS. The optimal operating conditions of oxytetracycline photocatalytic degradation were achived by changing the pH of the solution and changing the concentration of photocatalyst.
PB  - Novi Sad : Faculty of Technology
C3  - Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad
T1  - Structure and photocatalytic properties of sol-gel synthesized pseudobrookite
EP  - 133
SP  - 133
UR  - https://hdl.handle.net/21.15107/rcub_dais_6988
ER  - 
@conference{
author = "Vasiljević, Zorka Z and Dojčinović, Milena and Janković Častvan, Ivona and Vujančević, Jelena and Tadić, Nenad B. and Nikolić, Maria Vesna",
year = "2019",
abstract = "Fe2TiO5 nanopartcles were synthesized by modified sol-gel method with aid ofFe(NO3)3 9H2O and Ti(OC3H7)4 as starting reagents, oxalic acid as chilate agent and cetyltrimethylammonium bromide as surfactant. The aim of this study was to asses the photocatalytic degradaton of the antibiotic Oxytetracycline (OTC) using visible light irradiation. As prepared nanoparticles were characterized by XRD, BET, FESEM and UV-vis DRS. The optimal operating conditions of oxytetracycline photocatalytic degradation were achived by changing the pH of the solution and changing the concentration of photocatalyst.",
publisher = "Novi Sad : Faculty of Technology",
journal = "Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad",
title = "Structure and photocatalytic properties of sol-gel synthesized pseudobrookite",
pages = "133-133",
url = "https://hdl.handle.net/21.15107/rcub_dais_6988"
}
Vasiljević, Z. Z., Dojčinović, M., Janković Častvan, I., Vujančević, J., Tadić, N. B.,& Nikolić, M. V.. (2019). Structure and photocatalytic properties of sol-gel synthesized pseudobrookite. in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad
Novi Sad : Faculty of Technology., 133-133.
https://hdl.handle.net/21.15107/rcub_dais_6988
Vasiljević ZZ, Dojčinović M, Janković Častvan I, Vujančević J, Tadić NB, Nikolić MV. Structure and photocatalytic properties of sol-gel synthesized pseudobrookite. in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad. 2019;:133-133.
https://hdl.handle.net/21.15107/rcub_dais_6988 .
Vasiljević, Zorka Z, Dojčinović, Milena, Janković Častvan, Ivona, Vujančević, Jelena, Tadić, Nenad B., Nikolić, Maria Vesna, "Structure and photocatalytic properties of sol-gel synthesized pseudobrookite" in Programme and book of abstracts / 13th Conference for Young Scientists in Ceramics (CYSC-2017), October 16-19, 2019, Novi Sad (2019):133-133,
https://hdl.handle.net/21.15107/rcub_dais_6988 .

Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite

Vasiljević, Zorka Z; Dojčinović, Milena; Janković Častvan, Ivona; Vujančević, Jelena; Tadić, Nenad B.; Nikolić, Maria Vesna

(Belgrade : Institute of Technical Sciences of SASA, 2019)

TY  - CONF
AU  - Vasiljević, Zorka Z
AU  - Dojčinović, Milena
AU  - Janković Častvan, Ivona
AU  - Vujančević, Jelena
AU  - Tadić, Nenad B.
AU  - Nikolić, Maria Vesna
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6967
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1625
AB  - Fe2TiO5 nanoparticles were synthesized by modified sol-gel method using Fe(NO3)3×9H2O and Ti(OC3H7)4 as starting reagents, oxalic acid as chilate agent and cetyltrimethylammonium bromide as surfactant. The aim of this study was to asses the photocatalytic degradaton of water pollutants, methylene blue and the antibiotic Oxytetracycline (OTC) using natural sunlight irradiation. As prepared nanoparticles were characterized by XRD, BET, FESEM and UV-vis DRS. The optimal operating conditions of photocatalytic degradation of water pollutants were achived by changing the pH of the solution and changing the concentration of photocatalyst.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
T1  - Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite
EP  - 70
SP  - 70
UR  - https://hdl.handle.net/21.15107/rcub_dais_6967
ER  - 
@conference{
author = "Vasiljević, Zorka Z and Dojčinović, Milena and Janković Častvan, Ivona and Vujančević, Jelena and Tadić, Nenad B. and Nikolić, Maria Vesna",
year = "2019",
abstract = "Fe2TiO5 nanoparticles were synthesized by modified sol-gel method using Fe(NO3)3×9H2O and Ti(OC3H7)4 as starting reagents, oxalic acid as chilate agent and cetyltrimethylammonium bromide as surfactant. The aim of this study was to asses the photocatalytic degradaton of water pollutants, methylene blue and the antibiotic Oxytetracycline (OTC) using natural sunlight irradiation. As prepared nanoparticles were characterized by XRD, BET, FESEM and UV-vis DRS. The optimal operating conditions of photocatalytic degradation of water pollutants were achived by changing the pH of the solution and changing the concentration of photocatalyst.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia",
title = "Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite",
pages = "70-70",
url = "https://hdl.handle.net/21.15107/rcub_dais_6967"
}
Vasiljević, Z. Z., Dojčinović, M., Janković Častvan, I., Vujančević, J., Tadić, N. B.,& Nikolić, M. V.. (2019). Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 70-70.
https://hdl.handle.net/21.15107/rcub_dais_6967
Vasiljević ZZ, Dojčinović M, Janković Častvan I, Vujančević J, Tadić NB, Nikolić MV. Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia. 2019;:70-70.
https://hdl.handle.net/21.15107/rcub_dais_6967 .
Vasiljević, Zorka Z, Dojčinović, Milena, Janković Častvan, Ivona, Vujančević, Jelena, Tadić, Nenad B., Nikolić, Maria Vesna, "Photocatalytic degradation of methylene blue and oxytetracycline via sol-gel synthesized pseudobrookite" in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia (2019):70-70,
https://hdl.handle.net/21.15107/rcub_dais_6967 .

Structural, photocatalytic and photoelectrochemical characteristics of ZnO nanoparticles synthesized by a glycine-nitrate process

Dojčinović, Milena; Stojković Simatović, Ivana; Marković, Smilja; Janković Častvan, Ivona; Bajuk-Bogdanović, Danica; Stojadinović, Stevan; Rac, Vladislav; Nikolić, Maria Vesna

(Budapest : [s. n.], 2019)

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 .

Synthesis and characterisation of ZnO synthesized by glycine-nitrate combustion process

Dojčinović, Milena; Marković, Smilja; Stojadinović, Stevan; Rac, Vladislav; Janković Častvan, Ivona; Stojković Simatović, Ivana

(Belgrade : Institute of Technical Sciences of SASA, 2018)

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 .