TY  - JOUR
AU  - Milićević, Nemanja
AU  - Novaković, Mirjana M.
AU  - Potočnik, Jelena
AU  - Milović, Miloš
AU  - Rakočević, Lazar
AU  - Abazović, Nadica
AU  - Pjević, Dejan J.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/12946
AB  - Enhanced optical properties of TiO2 thin films can be achieved by doping or coating with metals. Metal-doped TiO2 can reduce electron-hole recombination and increase hydroxyl radical concentration on the surface of TiO2, resulting in increase of the photocatalytic activity. TiO2 and TiO2-Au thin films were obtained by DC magnetron sputtering of Ti target with Ar ions in O2 atmosphere. In the case of Au buffered TiO2 thin films, two different systems were deposited for comparison. Post deposition annealing at 400 °C was carried out in nitrogen atmosphere for 3 h. The structural and optical characteristics of the prepared films were investigated in detail by the combination of high-resolution microscopic and spectroscopic techniques. The photo-degradation rate was measured using Rhodamine B which simulated pollutant. Post deposition annealing resulted in diffusion of Au atoms through the layer as it was revealed by transmission electron microscopy and energy dispersive X-ray spectroscopy. The obtained TiO2 thin films were found to be amorphous after deposition and annealing at 400 °C leads to crystallization of anatase phase. Analysis of the binding energy in the corresponding X-ray photoelectron spectra has confirmed stoichiometry of TiO2 and that concentration of Au on the surface can be controlled by sputtering and annealing conditions, thus changing optical properties by influencing the surface plasmonic nature. All Au doped TiO2 thin films exhibited enhanced wettability and photo-degradation rates when compared to pristine titania films. © 2022 Elsevier B.V.
T2  - Surfaces and Interfaces
T1  - Influencing surface phenomena by Au diffusion in buffered TiO2-Au thin films: Effects of deposition and annealing processing
SP  - 101811
VL  - 30
DO  - 10.1016/j.surfin.2022.101811
UR  - https://hdl.handle.net/21.15107/rcub_dais_12946
ER  - 

@article{
author = "Milićević, Nemanja and Novaković, Mirjana M. and Potočnik, Jelena and Milović, Miloš and Rakočević, Lazar and Abazović, Nadica and Pjević, Dejan J.",
year = "2022",
abstract = "Enhanced optical properties of TiO2 thin films can be achieved by doping or coating with metals. Metal-doped TiO2 can reduce electron-hole recombination and increase hydroxyl radical concentration on the surface of TiO2, resulting in increase of the photocatalytic activity. TiO2 and TiO2-Au thin films were obtained by DC magnetron sputtering of Ti target with Ar ions in O2 atmosphere. In the case of Au buffered TiO2 thin films, two different systems were deposited for comparison. Post deposition annealing at 400 °C was carried out in nitrogen atmosphere for 3 h. The structural and optical characteristics of the prepared films were investigated in detail by the combination of high-resolution microscopic and spectroscopic techniques. The photo-degradation rate was measured using Rhodamine B which simulated pollutant. Post deposition annealing resulted in diffusion of Au atoms through the layer as it was revealed by transmission electron microscopy and energy dispersive X-ray spectroscopy. The obtained TiO2 thin films were found to be amorphous after deposition and annealing at 400 °C leads to crystallization of anatase phase. Analysis of the binding energy in the corresponding X-ray photoelectron spectra has confirmed stoichiometry of TiO2 and that concentration of Au on the surface can be controlled by sputtering and annealing conditions, thus changing optical properties by influencing the surface plasmonic nature. All Au doped TiO2 thin films exhibited enhanced wettability and photo-degradation rates when compared to pristine titania films. © 2022 Elsevier B.V.",
journal = "Surfaces and Interfaces",
title = "Influencing surface phenomena by Au diffusion in buffered TiO2-Au thin films: Effects of deposition and annealing processing",
pages = "101811",
volume = "30",
doi = "10.1016/j.surfin.2022.101811",
url = "https://hdl.handle.net/21.15107/rcub_dais_12946"
}

Milićević, N., Novaković, M. M., Potočnik, J., Milović, M., Rakočević, L., Abazović, N.,& Pjević, D. J.. (2022). Influencing surface phenomena by Au diffusion in buffered TiO2-Au thin films: Effects of deposition and annealing processing. in Surfaces and Interfaces, 30, 101811.
https://doi.org/10.1016/j.surfin.2022.101811
https://hdl.handle.net/21.15107/rcub_dais_12946

Milićević N, Novaković MM, Potočnik J, Milović M, Rakočević L, Abazović N, Pjević DJ. Influencing surface phenomena by Au diffusion in buffered TiO2-Au thin films: Effects of deposition and annealing processing. in Surfaces and Interfaces. 2022;30:101811.
doi:10.1016/j.surfin.2022.101811
https://hdl.handle.net/21.15107/rcub_dais_12946 .

Milićević, Nemanja, Novaković, Mirjana M., Potočnik, Jelena, Milović, Miloš, Rakočević, Lazar, Abazović, Nadica, Pjević, Dejan J., "Influencing surface phenomena by Au diffusion in buffered TiO2-Au thin films: Effects of deposition and annealing processing" in Surfaces and Interfaces, 30 (2022):101811,
https://doi.org/10.1016/j.surfin.2022.101811 .,
https://hdl.handle.net/21.15107/rcub_dais_12946 .

TY  - JOUR
AU  - Marković, Smilja
AU  - Rajić, Vladimir B.
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Belošević Čavor, Jelena
AU  - Batalović, Katarina
AU  - Abazović, Nadica
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/2317
AB  - ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed.
PB  - Elsevier
T2  - Solar Energy
T1  - Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites
SP  - 124
EP  - 135
VL  - 127
DO  - 10.1016/j.solener.2016.01.026
UR  - https://hdl.handle.net/21.15107/rcub_dais_2317
ER  - 

@article{
author = "Marković, Smilja and Rajić, Vladimir B. and Stanković, Ana and Veselinović, Ljiljana and Belošević Čavor, Jelena and Batalović, Katarina and Abazović, Nadica and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2016",
abstract = "ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed.",
publisher = "Elsevier",
journal = "Solar Energy",
title = "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites",
pages = "124-135",
volume = "127",
doi = "10.1016/j.solener.2016.01.026",
url = "https://hdl.handle.net/21.15107/rcub_dais_2317"
}

Marković, S., Rajić, V. B., Stanković, A., Veselinović, L., Belošević Čavor, J., Batalović, K., Abazović, N., Škapin, S. D.,& Uskoković, D.. (2016). Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites. in Solar Energy
Elsevier., 127, 124-135.
https://doi.org/10.1016/j.solener.2016.01.026
https://hdl.handle.net/21.15107/rcub_dais_2317

Marković S, Rajić VB, Stanković A, Veselinović L, Belošević Čavor J, Batalović K, Abazović N, Škapin SD, Uskoković D. Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites. in Solar Energy. 2016;127:124-135.
doi:10.1016/j.solener.2016.01.026
https://hdl.handle.net/21.15107/rcub_dais_2317 .

Marković, Smilja, Rajić, Vladimir B., Stanković, Ana, Veselinović, Ljiljana, Belošević Čavor, Jelena, Batalović, Katarina, Abazović, Nadica, Škapin, Srečo Davor, Uskoković, Dragan, "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites" in Solar Energy, 127 (2016):124-135,
https://doi.org/10.1016/j.solener.2016.01.026 .,
https://hdl.handle.net/21.15107/rcub_dais_2317 .

TY  - JOUR
AU  - Carević, M. V.
AU  - Abazović, Nadica
AU  - Novaković, T. B.
AU  - Pavlović, Vladimir B.
AU  - Čomor, Mirjana
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/15963
AB  - We present a hydrothermal method for synthesis of zirconia nanopowders: pure and with incorporatedSi4+ions. Zirconyl chloride and tetraethyl orthosilicate were used as precursors. As prepared powderswere annealed at 600◦C and characterized using structural (XRD), morphological (SEM and TEM) andoptical techniques (UV/vis DR, FTIR and photoluminescence spectroscopy). Their textural properties(BET method) and photocatalytic activity toward degradation of model compounds (tricholophenol andRhodamine B) using simmulated solar light were obtained. We showed that by using hydrothermal syn-thesis method pure monoclinic ZrO2highly crystalline powder can be obtained. Incorporation of Si4+ionsinduced stabilization of tetragonal crystalline phase at room temperature and decreasing of particle sizes.Incorporation of Si4+ions in zirconia matrix also resulted in increase of specific area of nanopowders. FTIRmeasurements were used as proof for existence of Zr O Si bond. Effective band gap of zirconia pow-ders was reduced from 5 (pure ZrO2) to 3.8 eV for samples with Si4+ions. All zirconia powders showedsignificant photocatalytic activity regarding degradation of triclorophenol and no activity regarding RB(Rhodamine B dye). Photocatalytic activity of zirconia was increased by incorporation of Si ions in thehost matrix. The source of this observation is discussed correlating all obtained properties of pure andSi-incorporated nanopowders. Optimization of synthesis parameters and composition of zirconia sam-ples obviously can lead to their photocatalytic activity comparable to Degussa TiO2powder, famous andcommercial photocatalyst.
PB  - Elsevier
T2  - Applied Catalysis B: Environmental
T1  - Zirconium dioxide nanopowders with incorporated Si4+ions asefficient photocatalyst for degradation of trichlorophenol usingsimulated solar light
SP  - 112
EP  - 120
VL  - 195
DO  - 10.1016/j.apcatb.2016.05.005
UR  - https://hdl.handle.net/21.15107/rcub_dais_15963
ER  - 

@article{
author = "Carević, M. V. and Abazović, Nadica and Novaković, T. B. and Pavlović, Vladimir B. and Čomor, Mirjana",
year = "2016",
abstract = "We present a hydrothermal method for synthesis of zirconia nanopowders: pure and with incorporatedSi4+ions. Zirconyl chloride and tetraethyl orthosilicate were used as precursors. As prepared powderswere annealed at 600◦C and characterized using structural (XRD), morphological (SEM and TEM) andoptical techniques (UV/vis DR, FTIR and photoluminescence spectroscopy). Their textural properties(BET method) and photocatalytic activity toward degradation of model compounds (tricholophenol andRhodamine B) using simmulated solar light were obtained. We showed that by using hydrothermal syn-thesis method pure monoclinic ZrO2highly crystalline powder can be obtained. Incorporation of Si4+ionsinduced stabilization of tetragonal crystalline phase at room temperature and decreasing of particle sizes.Incorporation of Si4+ions in zirconia matrix also resulted in increase of specific area of nanopowders. FTIRmeasurements were used as proof for existence of Zr O Si bond. Effective band gap of zirconia pow-ders was reduced from 5 (pure ZrO2) to 3.8 eV for samples with Si4+ions. All zirconia powders showedsignificant photocatalytic activity regarding degradation of triclorophenol and no activity regarding RB(Rhodamine B dye). Photocatalytic activity of zirconia was increased by incorporation of Si ions in thehost matrix. The source of this observation is discussed correlating all obtained properties of pure andSi-incorporated nanopowders. Optimization of synthesis parameters and composition of zirconia sam-ples obviously can lead to their photocatalytic activity comparable to Degussa TiO2powder, famous andcommercial photocatalyst.",
publisher = "Elsevier",
journal = "Applied Catalysis B: Environmental",
title = "Zirconium dioxide nanopowders with incorporated Si4+ions asefficient photocatalyst for degradation of trichlorophenol usingsimulated solar light",
pages = "112-120",
volume = "195",
doi = "10.1016/j.apcatb.2016.05.005",
url = "https://hdl.handle.net/21.15107/rcub_dais_15963"
}

Carević, M. V., Abazović, N., Novaković, T. B., Pavlović, V. B.,& Čomor, M.. (2016). Zirconium dioxide nanopowders with incorporated Si4+ions asefficient photocatalyst for degradation of trichlorophenol usingsimulated solar light. in Applied Catalysis B: Environmental
Elsevier., 195, 112-120.
https://doi.org/10.1016/j.apcatb.2016.05.005
https://hdl.handle.net/21.15107/rcub_dais_15963

Carević MV, Abazović N, Novaković TB, Pavlović VB, Čomor M. Zirconium dioxide nanopowders with incorporated Si4+ions asefficient photocatalyst for degradation of trichlorophenol usingsimulated solar light. in Applied Catalysis B: Environmental. 2016;195:112-120.
doi:10.1016/j.apcatb.2016.05.005
https://hdl.handle.net/21.15107/rcub_dais_15963 .

Carević, M. V., Abazović, Nadica, Novaković, T. B., Pavlović, Vladimir B., Čomor, Mirjana, "Zirconium dioxide nanopowders with incorporated Si4+ions asefficient photocatalyst for degradation of trichlorophenol usingsimulated solar light" in Applied Catalysis B: Environmental, 195 (2016):112-120,
https://doi.org/10.1016/j.apcatb.2016.05.005 .,
https://hdl.handle.net/21.15107/rcub_dais_15963 .

TY  - CONF
AU  - Stanković, Ana
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana
AU  - Abazović, Nadica
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - https://dais.sanu.ac.rs/123456789/529
AB  - In this work we present details of different synthesis procedures for preparation of ZnO powders and a possibility to create various particles morphology and average size; from micrometer rods to nanometer spherical particles. We studied two synthesis methods, low temperature hydrothermal processing (HT) and ultrasound processing (US). The morphology and average particle size of the ZnO particles were modified by adjusting the mole ratio of [Zn2+]/[OH] in the reactants solution. Agglomeration of the particles was prevented using a polyvinyl pyrrolidone (PVP) as a capping agent. The synthesized powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (FESEM) and UV-Vis - diffusion reflection spectroscopy (UV-Vis DRS). Based on the results of the scanning electron microscopy we proposed a possible growth mechanism of the ZnO particles depending on the mole ratio of [Zn2+]/[OH]. 
Also, we considered the influence of particle size and morphology on the optical properties of the prepared powders. The observed results sowed that the size and morphology of ZnO particles greatly affect the absorption of visible light (%) and the shift of the energy gap (eV).
PB  - Belgrade : Serbian Ceramic Society
C3  - Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
T1  - Influence of particle size and morphology of ZnO powders on their optical properties
SP  - 60
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_dais_529
ER  - 

@conference{
author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana and Abazović, Nadica and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
abstract = "In this work we present details of different synthesis procedures for preparation of ZnO powders and a possibility to create various particles morphology and average size; from micrometer rods to nanometer spherical particles. We studied two synthesis methods, low temperature hydrothermal processing (HT) and ultrasound processing (US). The morphology and average particle size of the ZnO particles were modified by adjusting the mole ratio of [Zn2+]/[OH] in the reactants solution. Agglomeration of the particles was prevented using a polyvinyl pyrrolidone (PVP) as a capping agent. The synthesized powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (FESEM) and UV-Vis - diffusion reflection spectroscopy (UV-Vis DRS). Based on the results of the scanning electron microscopy we proposed a possible growth mechanism of the ZnO particles depending on the mole ratio of [Zn2+]/[OH]. 
Also, we considered the influence of particle size and morphology on the optical properties of the prepared powders. The observed results sowed that the size and morphology of ZnO particles greatly affect the absorption of visible light (%) and the shift of the energy gap (eV).",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts",
title = "Influence of particle size and morphology of ZnO powders on their optical properties",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_dais_529"
}

Stanković, A., Stojanović, Z. S., Veselinović, L., Abazović, N., Škapin, S. D., Marković, S.,& Uskoković, D.. (2012). Influence of particle size and morphology of ZnO powders on their optical properties. in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
Belgrade : Serbian Ceramic Society., 60-60.
https://hdl.handle.net/21.15107/rcub_dais_529

Stanković A, Stojanović ZS, Veselinović L, Abazović N, Škapin SD, Marković S, Uskoković D. Influence of particle size and morphology of ZnO powders on their optical properties. in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts. 2012;:60-60.
https://hdl.handle.net/21.15107/rcub_dais_529 .

Stanković, Ana, Stojanović, Zoran S., Veselinović, Ljiljana, Abazović, Nadica, Škapin, Srečo Davor, Marković, Smilja, Uskoković, Dragan, "Influence of particle size and morphology of ZnO powders on their optical properties" in Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts (2012):60-60,
https://hdl.handle.net/21.15107/rcub_dais_529 .