TY  - CONF
AU  - Labus, Nebojša
AU  - Szabó, Juraj
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Dinić, Ivana
AU  - Mitrašinović, Aleksandar
AU  - Kuzmanović, Maja
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/16169
AB  - Phase transition from ZnTiO3 to Zn2TiO4 represents second order phase transition from perovskite (zinc metatitanate) with a hexagonal ilmenite structure (R¯3) to inverse spinel (zinc orthotitanate) cubic structure (Fd¯3m) stable from room temperature to its melting (liquid) was identified during sintering of ZnTiO3 nanopowder. Kinetic of the phase transition has been observed as dimensional changes using dilatometric device thermo-mechanical analyzer TMA SETARAM model SETSYS Evolution and as thermal changes with SETARAM SETSYS Evolution TGA-DTA/DSC device. Two forms of specimens were employed nanopowder and polycrystalline sintered bulk specimen. It was found that sintering process and relaxation of the nanodimensional powder particles stress phenomena strongly influence kinetic of the phase transition. Dilatometric results known from previous investigations are now compared with differential thermal analysis results.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.
T1  - Kinetic of the ZnTiO3 to Zn2TiO4 phase transition observed on nano dimensional powder and polycrystalline bulk specimen using thermal analysis - DTA and dilatometer
SP  - 87
EP  - 87
UR  - https://hdl.handle.net/21.15107/rcub_dais_16169
ER  - 

@conference{
author = "Labus, Nebojša and Szabó, Juraj and Marković, Smilja and Stanković, Ana and Dinić, Ivana and Mitrašinović, Aleksandar and Kuzmanović, Maja",
year = "2023",
abstract = "Phase transition from ZnTiO3 to Zn2TiO4 represents second order phase transition from perovskite (zinc metatitanate) with a hexagonal ilmenite structure (R¯3) to inverse spinel (zinc orthotitanate) cubic structure (Fd¯3m) stable from room temperature to its melting (liquid) was identified during sintering of ZnTiO3 nanopowder. Kinetic of the phase transition has been observed as dimensional changes using dilatometric device thermo-mechanical analyzer TMA SETARAM model SETSYS Evolution and as thermal changes with SETARAM SETSYS Evolution TGA-DTA/DSC device. Two forms of specimens were employed nanopowder and polycrystalline sintered bulk specimen. It was found that sintering process and relaxation of the nanodimensional powder particles stress phenomena strongly influence kinetic of the phase transition. Dilatometric results known from previous investigations are now compared with differential thermal analysis results.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.",
title = "Kinetic of the ZnTiO3 to Zn2TiO4 phase transition observed on nano dimensional powder and polycrystalline bulk specimen using thermal analysis - DTA and dilatometer",
pages = "87-87",
url = "https://hdl.handle.net/21.15107/rcub_dais_16169"
}

Labus, N., Szabó, J., Marković, S., Stanković, A., Dinić, I., Mitrašinović, A.,& Kuzmanović, M.. (2023). Kinetic of the ZnTiO3 to Zn2TiO4 phase transition observed on nano dimensional powder and polycrystalline bulk specimen using thermal analysis - DTA and dilatometer. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.
Belgrade : Serbian Ceramic Society., 87-87.
https://hdl.handle.net/21.15107/rcub_dais_16169

Labus N, Szabó J, Marković S, Stanković A, Dinić I, Mitrašinović A, Kuzmanović M. Kinetic of the ZnTiO3 to Zn2TiO4 phase transition observed on nano dimensional powder and polycrystalline bulk specimen using thermal analysis - DTA and dilatometer. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.. 2023;:87-87.
https://hdl.handle.net/21.15107/rcub_dais_16169 .

Labus, Nebojša, Szabó, Juraj, Marković, Smilja, Stanković, Ana, Dinić, Ivana, Mitrašinović, Aleksandar, Kuzmanović, Maja, "Kinetic of the ZnTiO3 to Zn2TiO4 phase transition observed on nano dimensional powder and polycrystalline bulk specimen using thermal analysis - DTA and dilatometer" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023. (2023):87-87,
https://hdl.handle.net/21.15107/rcub_dais_16169 .

TY  - CONF
AU  - Aleksić, Katarina
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Škapin, Srečo
AU  - Stojković Simatović, Ivana
AU  - Marković, Smilja
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/15853
AB  - The increasing demand for efficient catalysts has raised concerns about the limited availability and high cost of platinum group metal (PGM) catalysts. Ruthenium dioxide (RuO2) has shown remarkable catalytic activity; however, its extensive use is hindered by its high cost. To tackle this challenge, we investigated the utilization of zinc oxide (ZnO) as a promising alternative to reduce reliance on expensive RuO2 catalysts while maintaining catalytic performance by synthesizing ZnO/RuO2 composites in various mass ratios (1:1, 2:1, 10:1) through microwave processing of a precipitate, followed by calcination at temperatures of 300 and 600 °C. The crystallinity and phase purity of the particles were analyzed using Xray powder diffraction (XRD) and Raman spectroscopy. Surface chemistry was examined by Fourier-transform infrared (FTIR) spectroscopy. Field emission scanning electron microscopy was employed to investigate the morphology and particle size. Photoluminescence and UVVis diffuse reflectance spectroscopy were utilized for analyzing the optical properties. The electrocatalytic activity of the materials were evaluated via linear sweep voltammetry in both acidic (0.1 M H2SO4) and alkaline (0.1 M NaOH) electrolytes. The ZnO/RuO2 composites exhibited outstanding catalytic performance for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in both types of electrolytes.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023
T1  - Tailoring the ZnO/RuO2 ratio in composite electrocatalysts for efficient HER and OER
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_dais_15853
ER  - 

@conference{
author = "Aleksić, Katarina and Stanković, Ana and Veselinović, Ljiljana and Škapin, Srečo and Stojković Simatović, Ivana and Marković, Smilja",
year = "2023",
abstract = "The increasing demand for efficient catalysts has raised concerns about the limited availability and high cost of platinum group metal (PGM) catalysts. Ruthenium dioxide (RuO2) has shown remarkable catalytic activity; however, its extensive use is hindered by its high cost. To tackle this challenge, we investigated the utilization of zinc oxide (ZnO) as a promising alternative to reduce reliance on expensive RuO2 catalysts while maintaining catalytic performance by synthesizing ZnO/RuO2 composites in various mass ratios (1:1, 2:1, 10:1) through microwave processing of a precipitate, followed by calcination at temperatures of 300 and 600 °C. The crystallinity and phase purity of the particles were analyzed using Xray powder diffraction (XRD) and Raman spectroscopy. Surface chemistry was examined by Fourier-transform infrared (FTIR) spectroscopy. Field emission scanning electron microscopy was employed to investigate the morphology and particle size. Photoluminescence and UVVis diffuse reflectance spectroscopy were utilized for analyzing the optical properties. The electrocatalytic activity of the materials were evaluated via linear sweep voltammetry in both acidic (0.1 M H2SO4) and alkaline (0.1 M NaOH) electrolytes. The ZnO/RuO2 composites exhibited outstanding catalytic performance for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) in both types of electrolytes.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023",
title = "Tailoring the ZnO/RuO2 ratio in composite electrocatalysts for efficient HER and OER",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_dais_15853"
}

Aleksić, K., Stanković, A., Veselinović, L., Škapin, S., Stojković Simatović, I.,& Marković, S.. (2023). Tailoring the ZnO/RuO2 ratio in composite electrocatalysts for efficient HER and OER. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023
Belgrade : Serbian Ceramic Society., 62-62.
https://hdl.handle.net/21.15107/rcub_dais_15853

Aleksić K, Stanković A, Veselinović L, Škapin S, Stojković Simatović I, Marković S. Tailoring the ZnO/RuO2 ratio in composite electrocatalysts for efficient HER and OER. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023. 2023;:62-62.
https://hdl.handle.net/21.15107/rcub_dais_15853 .

Aleksić, Katarina, Stanković, Ana, Veselinović, Ljiljana, Škapin, Srečo, Stojković Simatović, Ivana, Marković, Smilja, "Tailoring the ZnO/RuO2 ratio in composite electrocatalysts for efficient HER and OER" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023 (2023):62-62,
https://hdl.handle.net/21.15107/rcub_dais_15853 .

TY  - CONF
AU  - Stanković, Ana
AU  - Aleksić, Katarina
AU  - Kratovac, Marija
AU  - Stojković Simatović, Ivana
AU  - Kraljić Rokvić, Marijana
AU  - Marković, Smilja
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14870
AB  - The release of pharmaceuticals in the environment represents a significant ecological problem due to their complex structure making them challenge to be decomposed and removed by standard waste-water treatment processes. Zinc oxide (ZnO) represents a semiconductor compound with exceptional optical and electrochemical properties, chemical and photochemical stability, nontoxicity, biocompatibility, etc. Due to their adjustable multifunctional properties, ZnO based materials have concerned general scientific and technological attention. Nowadays these materials are used for a range of applications in electronics, opto-electronics, biosensing, bioimaging, drug delivery, antimicrobial and anticancer agents, implants as well as sensing in environmental applications. The main object of this study was to improve efficiency of ZnO particles toward electrochemical sensing of water pollutants and electrocatalysis. In order to modify electrochemical properties, zinc oxide/graphene oxide (ZnO/GO) composites with different ZnO:GO weights ratio were prepared using a microwave (MW) assisted synthesis of precipitate. Two different amounts of GO (0.1 and 0.5 wt.%) were dispersed in 100 mL of distilled water. After stirring for 5 min an appropriate amount of ZnCl2 was added to the GO water dispersion. Subsequently, 20 mL of 1.75 M NaOH was added dropwise to the mixture with constant stirring. After being stirred at 50 C for 90 min in total, the as-prepared precipitate was microwave processed in a MW oven (2.45 GHz, 130 W) for 5 min. After cooling to room temperature, the precipitate was centrifuged and rinsed to remove the surface residues of the starting chemical solutions. The synthesized powder was dried in an oven at 80 C for 24 h. The particles crystal structure and phase composition were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology was determined with FE–SEM. The optical properties were studied using UV–Vis DRS and PL spectroscopy. The electrochemical sensing activity of ZnO and ZnO/GO electrodes was tested for detection of chloramphenicol water solution whereas electrocatalytic activity was tested for water splitting when samples were used as anode materials and evaluated by linear sweep voltammetry in 0.1M NaOH and 0.1 M H2SO4 electrolytes. ZnO/GO electrodes were tested as-prepared and after in situ reduction of GO at -1.4 V vs. SCE in 0.1 M KCl. Electrochemical activity of prepared composites was correlated with the presence of GO and reduced GO particles.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Twenty-fourth Annual Conference YUCOMAT 2023, Herceg Novi, Montenegro, September 4 - 8, 2023
T1  - Electrochemical detection of chloramphenicol drug based on ZnO and ZnO/graphene oxide composite nanoparticles
SP  - 155
EP  - 155
UR  - https://hdl.handle.net/21.15107/rcub_dais_14870
ER  - 

@conference{
author = "Stanković, Ana and Aleksić, Katarina and Kratovac, Marija and Stojković Simatović, Ivana and Kraljić Rokvić, Marijana and Marković, Smilja",
year = "2023",
abstract = "The release of pharmaceuticals in the environment represents a significant ecological problem due to their complex structure making them challenge to be decomposed and removed by standard waste-water treatment processes. Zinc oxide (ZnO) represents a semiconductor compound with exceptional optical and electrochemical properties, chemical and photochemical stability, nontoxicity, biocompatibility, etc. Due to their adjustable multifunctional properties, ZnO based materials have concerned general scientific and technological attention. Nowadays these materials are used for a range of applications in electronics, opto-electronics, biosensing, bioimaging, drug delivery, antimicrobial and anticancer agents, implants as well as sensing in environmental applications. The main object of this study was to improve efficiency of ZnO particles toward electrochemical sensing of water pollutants and electrocatalysis. In order to modify electrochemical properties, zinc oxide/graphene oxide (ZnO/GO) composites with different ZnO:GO weights ratio were prepared using a microwave (MW) assisted synthesis of precipitate. Two different amounts of GO (0.1 and 0.5 wt.%) were dispersed in 100 mL of distilled water. After stirring for 5 min an appropriate amount of ZnCl2 was added to the GO water dispersion. Subsequently, 20 mL of 1.75 M NaOH was added dropwise to the mixture with constant stirring. After being stirred at 50 C for 90 min in total, the as-prepared precipitate was microwave processed in a MW oven (2.45 GHz, 130 W) for 5 min. After cooling to room temperature, the precipitate was centrifuged and rinsed to remove the surface residues of the starting chemical solutions. The synthesized powder was dried in an oven at 80 C for 24 h. The particles crystal structure and phase composition were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology was determined with FE–SEM. The optical properties were studied using UV–Vis DRS and PL spectroscopy. The electrochemical sensing activity of ZnO and ZnO/GO electrodes was tested for detection of chloramphenicol water solution whereas electrocatalytic activity was tested for water splitting when samples were used as anode materials and evaluated by linear sweep voltammetry in 0.1M NaOH and 0.1 M H2SO4 electrolytes. ZnO/GO electrodes were tested as-prepared and after in situ reduction of GO at -1.4 V vs. SCE in 0.1 M KCl. Electrochemical activity of prepared composites was correlated with the presence of GO and reduced GO particles.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Twenty-fourth Annual Conference YUCOMAT 2023, Herceg Novi, Montenegro, September 4 - 8, 2023",
title = "Electrochemical detection of chloramphenicol drug based on ZnO and ZnO/graphene oxide composite nanoparticles",
pages = "155-155",
url = "https://hdl.handle.net/21.15107/rcub_dais_14870"
}

Stanković, A., Aleksić, K., Kratovac, M., Stojković Simatović, I., Kraljić Rokvić, M.,& Marković, S.. (2023). Electrochemical detection of chloramphenicol drug based on ZnO and ZnO/graphene oxide composite nanoparticles. in Programme and The Book of Abstracts / Twenty-fourth Annual Conference YUCOMAT 2023, Herceg Novi, Montenegro, September 4 - 8, 2023
Belgrade : Materials Research Society of Serbia., 155-155.
https://hdl.handle.net/21.15107/rcub_dais_14870

Stanković A, Aleksić K, Kratovac M, Stojković Simatović I, Kraljić Rokvić M, Marković S. Electrochemical detection of chloramphenicol drug based on ZnO and ZnO/graphene oxide composite nanoparticles. in Programme and The Book of Abstracts / Twenty-fourth Annual Conference YUCOMAT 2023, Herceg Novi, Montenegro, September 4 - 8, 2023. 2023;:155-155.
https://hdl.handle.net/21.15107/rcub_dais_14870 .

Stanković, Ana, Aleksić, Katarina, Kratovac, Marija, Stojković Simatović, Ivana, Kraljić Rokvić, Marijana, Marković, Smilja, "Electrochemical detection of chloramphenicol drug based on ZnO and ZnO/graphene oxide composite nanoparticles" in Programme and The Book of Abstracts / Twenty-fourth Annual Conference YUCOMAT 2023, Herceg Novi, Montenegro, September 4 - 8, 2023 (2023):155-155,
https://hdl.handle.net/21.15107/rcub_dais_14870 .

TY  - JOUR
AU  - Živojinović, Jelena
AU  - Peleš Tadić, Adriana
AU  - Kosanović, Darko
AU  - Filipović, Suzana
AU  - Stanković, Ana
AU  - Obradović, Nina
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14970
AB  - Istraživanja predstavljena u ovom radu prate uticaj mehaničke aktivacije na strukturu smeše stroncijumtitanata (SrTiO3) sa dodatkom 6 težinskih % gvožđe(III)oksida (Fe2O3) kao aditiva. Prahovi su mehanički aktivirani u visoko-energetskom planetarnom mlinu sa volfram-karbidnim (WC) kuglicama u vremenskom intervalu od 0 do 120 minuta. Korišćena je metoda rendgenske difrakcije (XRD) radi identifikacije faznog sastava smeša, a metode skenirajuće elektronske mikroskopije (SEM) i raspodele veličine čestica (PSA) korišćene su za praćenje promene u morfologiji i raspodeli veličina čestica aktiviranih prahova. Promene u kristalnoj rešetki SrTiO3 su praćene i ramanskom spektrometrijom, a izračunata je i širina zabranjene zone uzoraka. Cilj mehaničke aktivacije prahova je sniženje temperature i skraćivanje vremena procesa sinterovanja radi dobijanja finalnog proizvoda.
AB  - The authors investigated the influence of mechanical activation on the structure of SrTiO3 mixture with 6 wt.% Fe2O3. Powders were mechanically activated in a planetary ball mill with WC balls in time intervals from 0 to 120 minutes. XRD method was used for the identification of phase structure, while SEM and PSA were employed for monitoring of changes in morphology and particle size distribution. Structural changes were followed by Raman spectroscopy, and band gap values were calculated as well. The purpose of mechanical activation is lowering the temperature and time of sintering in the process of obtaining the final product.
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Uticaj mehaničke aktivacije na smešu SrTiO3 i Fe2O3 kao aditiva
SP  - 395
EP  - 400
VL  - 78
IS  - 4
DO  - 10.5937/tehnika2304395Z
UR  - https://hdl.handle.net/21.15107/rcub_dais_14970
ER  - 

@article{
author = "Živojinović, Jelena and Peleš Tadić, Adriana and Kosanović, Darko and Filipović, Suzana and Stanković, Ana and Obradović, Nina",
year = "2023",
abstract = "Istraživanja predstavljena u ovom radu prate uticaj mehaničke aktivacije na strukturu smeše stroncijumtitanata (SrTiO3) sa dodatkom 6 težinskih % gvožđe(III)oksida (Fe2O3) kao aditiva. Prahovi su mehanički aktivirani u visoko-energetskom planetarnom mlinu sa volfram-karbidnim (WC) kuglicama u vremenskom intervalu od 0 do 120 minuta. Korišćena je metoda rendgenske difrakcije (XRD) radi identifikacije faznog sastava smeša, a metode skenirajuće elektronske mikroskopije (SEM) i raspodele veličine čestica (PSA) korišćene su za praćenje promene u morfologiji i raspodeli veličina čestica aktiviranih prahova. Promene u kristalnoj rešetki SrTiO3 su praćene i ramanskom spektrometrijom, a izračunata je i širina zabranjene zone uzoraka. Cilj mehaničke aktivacije prahova je sniženje temperature i skraćivanje vremena procesa sinterovanja radi dobijanja finalnog proizvoda., The authors investigated the influence of mechanical activation on the structure of SrTiO3 mixture with 6 wt.% Fe2O3. Powders were mechanically activated in a planetary ball mill with WC balls in time intervals from 0 to 120 minutes. XRD method was used for the identification of phase structure, while SEM and PSA were employed for monitoring of changes in morphology and particle size distribution. Structural changes were followed by Raman spectroscopy, and band gap values were calculated as well. The purpose of mechanical activation is lowering the temperature and time of sintering in the process of obtaining the final product.",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Uticaj mehaničke aktivacije na smešu SrTiO3 i Fe2O3 kao aditiva",
pages = "395-400",
volume = "78",
number = "4",
doi = "10.5937/tehnika2304395Z",
url = "https://hdl.handle.net/21.15107/rcub_dais_14970"
}

Živojinović, J., Peleš Tadić, A., Kosanović, D., Filipović, S., Stanković, A.,& Obradović, N.. (2023). Uticaj mehaničke aktivacije na smešu SrTiO3 i Fe2O3 kao aditiva. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 78(4), 395-400.
https://doi.org/10.5937/tehnika2304395Z
https://hdl.handle.net/21.15107/rcub_dais_14970

Živojinović J, Peleš Tadić A, Kosanović D, Filipović S, Stanković A, Obradović N. Uticaj mehaničke aktivacije na smešu SrTiO3 i Fe2O3 kao aditiva. in Tehnika. 2023;78(4):395-400.
doi:10.5937/tehnika2304395Z
https://hdl.handle.net/21.15107/rcub_dais_14970 .

Živojinović, Jelena, Peleš Tadić, Adriana, Kosanović, Darko, Filipović, Suzana, Stanković, Ana, Obradović, Nina, "Uticaj mehaničke aktivacije na smešu SrTiO3 i Fe2O3 kao aditiva" in Tehnika, 78, no. 4 (2023):395-400,
https://doi.org/10.5937/tehnika2304395Z .,
https://hdl.handle.net/21.15107/rcub_dais_14970 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Aleksić, Katarina
AU  - Veselinović, Ljiljana
AU  - Stojković Simatović, Ivana
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/15154
AB  - Due to their tunable multifunctional properties zinc oxide (ZnO) based materials have attracted extensive scientific and technological attention. Since they combine different properties such as electrochemical activities, chemical and photochemical stability, nontoxicity, biocompatibility, etc. ZnO-based materials have been used in electronics, optoelectronics, biosensing, bioimaging, drug and gene delivery, implants, antimicrobial and anticancer agents. Successful application of ZnO as photoelectrocatalysts arises from its wide band gap (3.37 eV) which can be easily adjusted by different approaches such as: metal and non-metal ion doping, hydrogenation, introducing of crystalline defects, modifying particle morphology and surface chemistry. During the years, to synthesize zinc oxide (ZnO) nanoparticles with improved visible light absorption we have used a fast and environmentally-friendly microwave processing of a precipitate which enable formation of crystalline defects. To further enhance photo(electro)catalytic properties we have employed approaches such as: (1) the incorporation of iron ions into the crystal structure (Zn1-xFexO), (2) sensitization of the particles’ surface with cetyltrimethylammonium bromide, Pluronic F127 and polyethylene oxide, and (3) composites with ruthenium oxide (ZnO/RuO2) and graphene oxide (ZnO/GO and ZnO/rGO). To correlate structural and functional properties, prepared materials were characterized using XRD, FTIR, Raman, UV-Vis DRS, and PL spectroscopy, also FESEM; photocatalytic activity of the samples were tested toward decolorization of methylene blue, while their photoelectrochemical activity for water splitting were tested through linear sweep voltammetry in different electrolytes.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.
T1  - Approaches to improve photo(electro)catalytic properties of ZnO-based materials
SP  - 68
EP  - 69
UR  - https://hdl.handle.net/21.15107/rcub_dais_15154
ER  - 

@conference{
author = "Marković, Smilja and Stanković, Ana and Aleksić, Katarina and Veselinović, Ljiljana and Stojković Simatović, Ivana",
year = "2023",
abstract = "Due to their tunable multifunctional properties zinc oxide (ZnO) based materials have attracted extensive scientific and technological attention. Since they combine different properties such as electrochemical activities, chemical and photochemical stability, nontoxicity, biocompatibility, etc. ZnO-based materials have been used in electronics, optoelectronics, biosensing, bioimaging, drug and gene delivery, implants, antimicrobial and anticancer agents. Successful application of ZnO as photoelectrocatalysts arises from its wide band gap (3.37 eV) which can be easily adjusted by different approaches such as: metal and non-metal ion doping, hydrogenation, introducing of crystalline defects, modifying particle morphology and surface chemistry. During the years, to synthesize zinc oxide (ZnO) nanoparticles with improved visible light absorption we have used a fast and environmentally-friendly microwave processing of a precipitate which enable formation of crystalline defects. To further enhance photo(electro)catalytic properties we have employed approaches such as: (1) the incorporation of iron ions into the crystal structure (Zn1-xFexO), (2) sensitization of the particles’ surface with cetyltrimethylammonium bromide, Pluronic F127 and polyethylene oxide, and (3) composites with ruthenium oxide (ZnO/RuO2) and graphene oxide (ZnO/GO and ZnO/rGO). To correlate structural and functional properties, prepared materials were characterized using XRD, FTIR, Raman, UV-Vis DRS, and PL spectroscopy, also FESEM; photocatalytic activity of the samples were tested toward decolorization of methylene blue, while their photoelectrochemical activity for water splitting were tested through linear sweep voltammetry in different electrolytes.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.",
title = "Approaches to improve photo(electro)catalytic properties of ZnO-based materials",
pages = "68-69",
url = "https://hdl.handle.net/21.15107/rcub_dais_15154"
}

Marković, S., Stanković, A., Aleksić, K., Veselinović, L.,& Stojković Simatović, I.. (2023). Approaches to improve photo(electro)catalytic properties of ZnO-based materials. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.
Belgrade : Serbian Ceramic Society., 68-69.
https://hdl.handle.net/21.15107/rcub_dais_15154

Marković S, Stanković A, Aleksić K, Veselinović L, Stojković Simatović I. Approaches to improve photo(electro)catalytic properties of ZnO-based materials. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023.. 2023;:68-69.
https://hdl.handle.net/21.15107/rcub_dais_15154 .

Marković, Smilja, Stanković, Ana, Aleksić, Katarina, Veselinović, Ljiljana, Stojković Simatović, Ivana, "Approaches to improve photo(electro)catalytic properties of ZnO-based materials" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application XI New Frontiers in Multifunctional Material Science and Processing, Serbian Academy of Sciences and Art Serbia, Belgrade,18-20.September 2023. (2023):68-69,
https://hdl.handle.net/21.15107/rcub_dais_15154 .

TY  - JOUR
AU  - Aleksić, Katarina
AU  - Stojković Simatović, Ivana
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Stojadinović, Stevan
AU  - Rac, Vladislav
AU  - Radmilović, Nadežda
AU  - Rajić, Vladimir
AU  - Škapin, Srečo Davor
AU  - Mančić, Lidija
AU  - Marković, Smilja
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/14554
AB  - Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions.
PB  - Frontiers Media SA
T2  - Frontiers in Chemistry
T1  - Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting
VL  - 11
DO  - 10.3389/fchem.2023.1173910
UR  - https://hdl.handle.net/21.15107/rcub_dais_14554
ER  - 

@article{
author = "Aleksić, Katarina and Stojković Simatović, Ivana and Stanković, Ana and Veselinović, Ljiljana and Stojadinović, Stevan and Rac, Vladislav and Radmilović, Nadežda and Rajić, Vladimir and Škapin, Srečo Davor and Mančić, Lidija and Marković, Smilja",
year = "2023",
abstract = "Catalytic materials are the greatest challenge for the commercial application of water electrolysis (WEs) and fuel cells (FCs) as clean energy technologies. There is a need to find an alternative to expensive and unavailable platinum group metal (PGM) catalysts. This study aimed to reduce the cost of PGM materials by replacing Ru with RuO2 and lowering the amount of RuO2 by adding abundant and multifunctional ZnO. A ZnO@RuO2 composite in a 10:1 molar ratio was synthesized by microwave processing of a precipitate as a green, low-cost, and fast method, and then annealed at 300°C and 600°C to improve the catalytic properties. The physicochemical properties of the ZnO@RuO2 composites were investigated by X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance spectroscopy (DRS), and photoluminescence (PL) spectroscopy. The electrochemical activity of the samples was investigated by linear sweep voltammetry in acidic and alkaline electrolytes. We observed good bifunctional catalytic activity of the ZnO@RuO2 composites toward HER and OER in both electrolytes. The improved bifunctional catalytic activity of the ZnO@RuO2 composite by annealing was discussed and attributed to the reduced number of bulk oxygen vacancies and the increased number of established heterojunctions.",
publisher = "Frontiers Media SA",
journal = "Frontiers in Chemistry",
title = "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting",
volume = "11",
doi = "10.3389/fchem.2023.1173910",
url = "https://hdl.handle.net/21.15107/rcub_dais_14554"
}

Aleksić, K., Stojković Simatović, I., Stanković, A., Veselinović, L., Stojadinović, S., Rac, V., Radmilović, N., Rajić, V., Škapin, S. D., Mančić, L.,& Marković, S.. (2023). Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry
Frontiers Media SA., 11.
https://doi.org/10.3389/fchem.2023.1173910
https://hdl.handle.net/21.15107/rcub_dais_14554

Aleksić K, Stojković Simatović I, Stanković A, Veselinović L, Stojadinović S, Rac V, Radmilović N, Rajić V, Škapin SD, Mančić L, Marković S. Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting. in Frontiers in Chemistry. 2023;11.
doi:10.3389/fchem.2023.1173910
https://hdl.handle.net/21.15107/rcub_dais_14554 .

Aleksić, Katarina, Stojković Simatović, Ivana, Stanković, Ana, Veselinović, Ljiljana, Stojadinović, Stevan, Rac, Vladislav, Radmilović, Nadežda, Rajić, Vladimir, Škapin, Srečo Davor, Mančić, Lidija, Marković, Smilja, "Enhancement of ZnO@RuO2 bifunctional photo-electro catalytic activity toward water splitting" in Frontiers in Chemistry, 11 (2023),
https://doi.org/10.3389/fchem.2023.1173910 .,
https://hdl.handle.net/21.15107/rcub_dais_14554 .

TY  - CONF
AU  - Aleksić, Katarina
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Stojković Simatović, Ivana
AU  - Marković, Smilja
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13504
AB  - Due to their biocompatibility, chemical stability, high isoelectric point, electrochemical activity, high electron mobility and ease of synthesis by diverse methods, ZnO-based materials have attracted much interest as materials for biosensors. Its unique properties allow it to be used for single-molecule detection and determining various biomolecules, so it can be potentially utilized as biosensor for medical diagnosis. The materials being used as biosensors require special characteristics including high corrosion resistance. The aim of this research was to investigate biocorrosion properties of ZnO materials in Ringer’s physiological solution as a function of immersion time. ZnO powders were prepared by microwave (MW) processing of a precipitate in the presence of a different amount (5, 10 and 20 wt.%) of two different surfactants, CA and CTAB. The particles crystallinity and phase purity were investigated by X-ray powder diffraction (XRD) and Raman spectroscopy. Fourier-transform infrared (FTIR) spectroscopy was used to analyze surface chemistry. The particles morphology and textural properties were observed with field emission scanning electron microscopy (FE-SEM) and BET. The biocorrosion activity of the materials was measured by potentiodynamic polarization technique. Prepared samples were immersed in Ringer solution for different immersion times ranging from 30 min to 7 days. We found that all examined ZnO samples hаve low biocorrosion activity. Slight differences in biocorrosion activity between the samples are determined by particles morphology, textural properties and surface chemistry influenced by used surfactants.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Programme and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 - December 2, 2022, Belgrade, Serbia
T1  - The biocorrosion activity of ZnO-based materials as biosensors
SP  - 39
EP  - 39
UR  - https://hdl.handle.net/21.15107/rcub_dais_13504
ER  - 

@conference{
author = "Aleksić, Katarina and Stanković, Ana and Veselinović, Ljiljana and Stojković Simatović, Ivana and Marković, Smilja",
year = "2022",
abstract = "Due to their biocompatibility, chemical stability, high isoelectric point, electrochemical activity, high electron mobility and ease of synthesis by diverse methods, ZnO-based materials have attracted much interest as materials for biosensors. Its unique properties allow it to be used for single-molecule detection and determining various biomolecules, so it can be potentially utilized as biosensor for medical diagnosis. The materials being used as biosensors require special characteristics including high corrosion resistance. The aim of this research was to investigate biocorrosion properties of ZnO materials in Ringer’s physiological solution as a function of immersion time. ZnO powders were prepared by microwave (MW) processing of a precipitate in the presence of a different amount (5, 10 and 20 wt.%) of two different surfactants, CA and CTAB. The particles crystallinity and phase purity were investigated by X-ray powder diffraction (XRD) and Raman spectroscopy. Fourier-transform infrared (FTIR) spectroscopy was used to analyze surface chemistry. The particles morphology and textural properties were observed with field emission scanning electron microscopy (FE-SEM) and BET. The biocorrosion activity of the materials was measured by potentiodynamic polarization technique. Prepared samples were immersed in Ringer solution for different immersion times ranging from 30 min to 7 days. We found that all examined ZnO samples hаve low biocorrosion activity. Slight differences in biocorrosion activity between the samples are determined by particles morphology, textural properties and surface chemistry influenced by used surfactants.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Programme and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 - December 2, 2022, Belgrade, Serbia",
title = "The biocorrosion activity of ZnO-based materials as biosensors",
pages = "39-39",
url = "https://hdl.handle.net/21.15107/rcub_dais_13504"
}

Aleksić, K., Stanković, A., Veselinović, L., Stojković Simatović, I.,& Marković, S.. (2022). The biocorrosion activity of ZnO-based materials as biosensors. in Programme and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 - December 2, 2022, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 39-39.
https://hdl.handle.net/21.15107/rcub_dais_13504

Aleksić K, Stanković A, Veselinović L, Stojković Simatović I, Marković S. The biocorrosion activity of ZnO-based materials as biosensors. in Programme and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 - December 2, 2022, Belgrade, Serbia. 2022;:39-39.
https://hdl.handle.net/21.15107/rcub_dais_13504 .

Aleksić, Katarina, Stanković, Ana, Veselinović, Ljiljana, Stojković Simatović, Ivana, Marković, Smilja, "The biocorrosion activity of ZnO-based materials as biosensors" in Programme and the Book of Abstracts / Twentieth Young Researchers' Conference Materials Science and Engineering, November 30 - December 2, 2022, Belgrade, Serbia (2022):39-39,
https://hdl.handle.net/21.15107/rcub_dais_13504 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Stojković Simatović, Ivana
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13593
AB  - Due to their tunable multifunctional properties zinc oxide (ZnO) based materials have attracted extensive scientific and technological attention. Since they combines different properties such as electrochemical activities, chemical and photochemical stability, non-toxicity, biocompatibility, etc. ZnO-based materials have been used for variety of applications in electronics, opto-electronics, biosensing, bioimaging, drug and gene delivery, implants, antimicrobial and anticancer agents, as well as sensing in environmental applications.
The main aim of this study was to improve efficiency of ZnO particles toward both electrochemical sensing for environmental application and electrocatalysis. To vary electrochemical properties, series of zinc oxide/graphene oxide (ZnO/GO) composites were synthesized by microwave processing of precipitate in the presence of a different amount (0.1 and 0.5 wt.%) of previously prepared GO as well as reduced GO (rGO). The particles crystal structure and phase composition were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology was observed with FE–SEM while the textural properties (BET surface area and pore volume) were determined by low-temperature adsorption-desorption of nitrogen. The optical properties were studied using UV–Vis DRS and PL spectroscopy. The electrochemical sensing activity of ZnO, ZnO/GO and ZnO/rGO electrodes was tested for detection of bisphenol A in water solution while electrocatalytic activity was tested for water splitting when samples were used as anode materials and evaluated by linear sweep voltammetry in several different electrolytes. Differences in electrochemical activity between the composites were correlated with presence of GO, particles morphology and textural properties.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
T1  - Improvement of electrochemical properties of ZnO nanoparticles via composites with graphene oxide
SP  - 60
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_dais_13593
ER  - 

@conference{
author = "Marković, Smilja and Stanković, Ana and Stojković Simatović, Ivana",
year = "2022",
abstract = "Due to their tunable multifunctional properties zinc oxide (ZnO) based materials have attracted extensive scientific and technological attention. Since they combines different properties such as electrochemical activities, chemical and photochemical stability, non-toxicity, biocompatibility, etc. ZnO-based materials have been used for variety of applications in electronics, opto-electronics, biosensing, bioimaging, drug and gene delivery, implants, antimicrobial and anticancer agents, as well as sensing in environmental applications.
The main aim of this study was to improve efficiency of ZnO particles toward both electrochemical sensing for environmental application and electrocatalysis. To vary electrochemical properties, series of zinc oxide/graphene oxide (ZnO/GO) composites were synthesized by microwave processing of precipitate in the presence of a different amount (0.1 and 0.5 wt.%) of previously prepared GO as well as reduced GO (rGO). The particles crystal structure and phase composition were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology was observed with FE–SEM while the textural properties (BET surface area and pore volume) were determined by low-temperature adsorption-desorption of nitrogen. The optical properties were studied using UV–Vis DRS and PL spectroscopy. The electrochemical sensing activity of ZnO, ZnO/GO and ZnO/rGO electrodes was tested for detection of bisphenol A in water solution while electrocatalytic activity was tested for water splitting when samples were used as anode materials and evaluated by linear sweep voltammetry in several different electrolytes. Differences in electrochemical activity between the composites were correlated with presence of GO, particles morphology and textural properties.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022",
title = "Improvement of electrochemical properties of ZnO nanoparticles via composites with graphene oxide",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_dais_13593"
}

Marković, S., Stanković, A.,& Stojković Simatović, I.. (2022). Improvement of electrochemical properties of ZnO nanoparticles via composites with graphene oxide. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022
Belgrade : Materials Research Society of Serbia., 60-60.
https://hdl.handle.net/21.15107/rcub_dais_13593

Marković S, Stanković A, Stojković Simatović I. Improvement of electrochemical properties of ZnO nanoparticles via composites with graphene oxide. in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022. 2022;:60-60.
https://hdl.handle.net/21.15107/rcub_dais_13593 .

Marković, Smilja, Stanković, Ana, Stojković Simatović, Ivana, "Improvement of electrochemical properties of ZnO nanoparticles via composites with graphene oxide" in Program and The Book of abstracts / Twenty-third Annual Conference YUCOMAT 2022 & Twelfth World Round Table Conference on Sintering XII WRTCS 2022, Herceg Novi, Montenegro, August 29 - September 2, 2022 (2022):60-60,
https://hdl.handle.net/21.15107/rcub_dais_13593 .

TY  - CONF
AU  - Stanković, Ana
AU  - Filipović, Suzana
AU  - Veselinović, Ljiljana
AU  - Aleksić, Katarina
AU  - Stojković Simatović, Ivana
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13628
AB  - Conversion of solar energy into hydrogen energy via the water-splitting process, assisted by photo-semiconductor catalysts, is one of the most promising technologies for the future because large quantities of hydrogen can be generated in a clean and sustainable manner. Zinc oxide (ZnO) represents one of the most investigated photocatalyst. Its ability to overcome the limitations of pristine ZnO through enhanced visible light absorption and reduced recombination of photogenerated charge carriers have gathered the attention of the many research groups. Numerous studies enabled understanding its greater activities and most studies reveal that reactive oxygen species (ROS), oxygen vacancies (Ov) and zinc interstitials (Zni) are responsible for the enhanced photoactivity. In fact, different factors like defect concentration, defect location, valence and conduction band levels play a key role in the working mechanisms of ZnO material. Materials with the perovskite crystal structure such as BaTiO3 (BT) and BaTi1–XSnXO3 (BTS) found application in the construction of the active layer of the solar cell, in which the photogenerative electrons are generated. The environmental instability of perovskite solar cells caused by the ultraviolet photocatalytic effect of metal oxide layers is a critical issue that must be solved. Possible solution with improved environmental stability can be synthesis of ZnO composite heterojunction perovskite solar cells. In this study photo(electro) catalytic properties of: BT and BTS were compared with those of ZnO@BT and ZnO@BTS, respectively. In both cases the ZnO@BT and ZnO@BTS composite materials revealed enhanced photo(electro) catalytic activity as compared to the pristine BT and BTS materials. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE SEM), UV-Vis diffuse reflectance spectroscopy and linear voltammetry process.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
T1  - ZnO-based composite materials with improved photo(electro) catalytic properties
SP  - 85
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_dais_13628
ER  - 

@conference{
author = "Stanković, Ana and Filipović, Suzana and Veselinović, Ljiljana and Aleksić, Katarina and Stojković Simatović, Ivana and Škapin, Srečo Davor and Marković, Smilja",
year = "2022",
abstract = "Conversion of solar energy into hydrogen energy via the water-splitting process, assisted by photo-semiconductor catalysts, is one of the most promising technologies for the future because large quantities of hydrogen can be generated in a clean and sustainable manner. Zinc oxide (ZnO) represents one of the most investigated photocatalyst. Its ability to overcome the limitations of pristine ZnO through enhanced visible light absorption and reduced recombination of photogenerated charge carriers have gathered the attention of the many research groups. Numerous studies enabled understanding its greater activities and most studies reveal that reactive oxygen species (ROS), oxygen vacancies (Ov) and zinc interstitials (Zni) are responsible for the enhanced photoactivity. In fact, different factors like defect concentration, defect location, valence and conduction band levels play a key role in the working mechanisms of ZnO material. Materials with the perovskite crystal structure such as BaTiO3 (BT) and BaTi1–XSnXO3 (BTS) found application in the construction of the active layer of the solar cell, in which the photogenerative electrons are generated. The environmental instability of perovskite solar cells caused by the ultraviolet photocatalytic effect of metal oxide layers is a critical issue that must be solved. Possible solution with improved environmental stability can be synthesis of ZnO composite heterojunction perovskite solar cells. In this study photo(electro) catalytic properties of: BT and BTS were compared with those of ZnO@BT and ZnO@BTS, respectively. In both cases the ZnO@BT and ZnO@BTS composite materials revealed enhanced photo(electro) catalytic activity as compared to the pristine BT and BTS materials. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE SEM), UV-Vis diffuse reflectance spectroscopy and linear voltammetry process.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.",
title = "ZnO-based composite materials with improved photo(electro) catalytic properties",
pages = "85-86",
url = "https://hdl.handle.net/21.15107/rcub_dais_13628"
}

Stanković, A., Filipović, S., Veselinović, L., Aleksić, K., Stojković Simatović, I., Škapin, S. D.,& Marković, S.. (2022). ZnO-based composite materials with improved photo(electro) catalytic properties. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.
Belgrade : Serbian Ceramic Society., 85-86.
https://hdl.handle.net/21.15107/rcub_dais_13628

Stanković A, Filipović S, Veselinović L, Aleksić K, Stojković Simatović I, Škapin SD, Marković S. ZnO-based composite materials with improved photo(electro) catalytic properties. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022.. 2022;:85-86.
https://hdl.handle.net/21.15107/rcub_dais_13628 .

Stanković, Ana, Filipović, Suzana, Veselinović, Ljiljana, Aleksić, Katarina, Stojković Simatović, Ivana, Škapin, Srečo Davor, Marković, Smilja, "ZnO-based composite materials with improved photo(electro) catalytic properties" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application X New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 26-27. September 2022. (2022):85-86,
https://hdl.handle.net/21.15107/rcub_dais_13628 .

TY  - CONF
AU  - Aleksić, Katarina
AU  - Stanković, Ana
AU  - Stojković Simatović, Ivana
AU  - Marković, Smilja
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13682
AB  - Over the last decade, due to its numerous unique features that can achieve single biomolecule detection, zinc oxide have been examined as potential electrochemical biosensor for medical diagnosis. Previous studies proved success of ZnO-based materials in determining various biomolecules such as glucose, cholesterol, uric acid, etc. The materials being used as biosensors require special characteristics including high corrosion resistance. The main goal of this study was to examine biocorrosion characteristics of ZnO materials in Ringer’s physiological solution as a function of immersion time. Six different ZnO nanostructured powders were synthesized by microwave processing with an aid of citric acid and CTAB in different weight amount (5, 10, and 20 wt.%). To comprehend the influence of physicochemical characteristics of ZnO samples on biocorrosion, decisive features such as the crystal structure, morphology, textural properties, and surface chemistry were systematically investigated and correlated with biocorrosion activity. The biocorrosion activity of the samples was measured by potentiodynamic polarization technique. The measurements were performed on a potentiostat using a conventional three-electrode cell and a Ringer’s solution as the electrolyte. Platinum foil and a standard calomel electrode (SCE) were used as the counter and the reference electrode, respectively, while FTO glass was used as the working electrode. The working electrode was coated with a thin film of ZnO ink prepared by mixing of a ZnO powder as an active material and Nafion solution as a binder. Prepared specimens were immersed in 100 ml of Ringer’s solution for different immersion times ranging from 30 min to 7 days. The immersed specimens were then characterized by potentiodynamic polarization techniques in the potential range from -0.2 to +0.3 V vs SCE, at the scan rate of 0.1 mVs-1. We found that all examined ZnO samples has low biocorrosion activity. Slight differences in biocorrosion activity between the samples are determined by particles morphology, textural properties and surface chemistry influenced by used surfactants.
PB  - DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie e.V.
C3  - EUROCORR 2022 - European Corrosion Congress: Corrosion in a Changing World - Energy, Mobility, Digitalization, 28 August - 1 September 2022, Berlin, Germany: Abstracts / Extended papers for posters /
T1  - ZnO-based nanostructured electrodes for biosensors: Corrosion behavior in Ringer’s physiological solution
UR  - https://hdl.handle.net/21.15107/rcub_dais_13682
ER  - 

@conference{
author = "Aleksić, Katarina and Stanković, Ana and Stojković Simatović, Ivana and Marković, Smilja",
year = "2022",
abstract = "Over the last decade, due to its numerous unique features that can achieve single biomolecule detection, zinc oxide have been examined as potential electrochemical biosensor for medical diagnosis. Previous studies proved success of ZnO-based materials in determining various biomolecules such as glucose, cholesterol, uric acid, etc. The materials being used as biosensors require special characteristics including high corrosion resistance. The main goal of this study was to examine biocorrosion characteristics of ZnO materials in Ringer’s physiological solution as a function of immersion time. Six different ZnO nanostructured powders were synthesized by microwave processing with an aid of citric acid and CTAB in different weight amount (5, 10, and 20 wt.%). To comprehend the influence of physicochemical characteristics of ZnO samples on biocorrosion, decisive features such as the crystal structure, morphology, textural properties, and surface chemistry were systematically investigated and correlated with biocorrosion activity. The biocorrosion activity of the samples was measured by potentiodynamic polarization technique. The measurements were performed on a potentiostat using a conventional three-electrode cell and a Ringer’s solution as the electrolyte. Platinum foil and a standard calomel electrode (SCE) were used as the counter and the reference electrode, respectively, while FTO glass was used as the working electrode. The working electrode was coated with a thin film of ZnO ink prepared by mixing of a ZnO powder as an active material and Nafion solution as a binder. Prepared specimens were immersed in 100 ml of Ringer’s solution for different immersion times ranging from 30 min to 7 days. The immersed specimens were then characterized by potentiodynamic polarization techniques in the potential range from -0.2 to +0.3 V vs SCE, at the scan rate of 0.1 mVs-1. We found that all examined ZnO samples has low biocorrosion activity. Slight differences in biocorrosion activity between the samples are determined by particles morphology, textural properties and surface chemistry influenced by used surfactants.",
publisher = "DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie e.V.",
journal = "EUROCORR 2022 - European Corrosion Congress: Corrosion in a Changing World - Energy, Mobility, Digitalization, 28 August - 1 September 2022, Berlin, Germany: Abstracts / Extended papers for posters /",
title = "ZnO-based nanostructured electrodes for biosensors: Corrosion behavior in Ringer’s physiological solution",
url = "https://hdl.handle.net/21.15107/rcub_dais_13682"
}

Aleksić, K., Stanković, A., Stojković Simatović, I.,& Marković, S.. (2022). ZnO-based nanostructured electrodes for biosensors: Corrosion behavior in Ringer’s physiological solution. in EUROCORR 2022 - European Corrosion Congress: Corrosion in a Changing World - Energy, Mobility, Digitalization, 28 August - 1 September 2022, Berlin, Germany: Abstracts / Extended papers for posters /
DECHEMA, Gesellschaft für Chemische Technik und Biotechnologie e.V...
https://hdl.handle.net/21.15107/rcub_dais_13682

Aleksić K, Stanković A, Stojković Simatović I, Marković S. ZnO-based nanostructured electrodes for biosensors: Corrosion behavior in Ringer’s physiological solution. in EUROCORR 2022 - European Corrosion Congress: Corrosion in a Changing World - Energy, Mobility, Digitalization, 28 August - 1 September 2022, Berlin, Germany: Abstracts / Extended papers for posters /. 2022;.
https://hdl.handle.net/21.15107/rcub_dais_13682 .

Aleksić, Katarina, Stanković, Ana, Stojković Simatović, Ivana, Marković, Smilja, "ZnO-based nanostructured electrodes for biosensors: Corrosion behavior in Ringer’s physiological solution" in EUROCORR 2022 - European Corrosion Congress: Corrosion in a Changing World - Energy, Mobility, Digitalization, 28 August - 1 September 2022, Berlin, Germany: Abstracts / Extended papers for posters / (2022),
https://hdl.handle.net/21.15107/rcub_dais_13682 .

TY  - CONF
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11911
AB  - It is known that the functional properties of zinc oxide (ZnO) materials depend on their physico-chemical properties, such as optical properties and specific surface area. They are defined with structural characteristics, for example: the particle size and morphology, phase composition, crystallite size, crystallinity degree, as well as the crystal structure ordering, i.e., the presence of structural defects. The primary purpose of this study was to synthesize ZnO powders with various physico-chemical properties by optimizing the reaction conditions in different processing methods. For example, reaction temperature or addition of various surfactants such as polyvinyl alcohol, polyvinyl pyrrolidone, or polyethylene oxide. In this study, to vary physico-chemical properties of ZnO particles, four different synthesis methods were employed: mechanochemical, hydrothermal, ultrasonic and microwave processing. Structural and morphological properties of prepared ZnO powders were characterized using a number of techniques such as: X-ray powder diffraction (XRPD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance and photoluminescence (PL) spectroscopy. One of the functional properties of the synthesized ZnO powders that was particularly examined is photocatalytic activity. In order to examine ZnO as a photocatalyst, photodegradation of methylene blue (MB) dye was carried out under simulated and direct sunlight irradiation. The UV–Vis spectra showed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased absorption, and a slight red-shift of the absorption edge. Besides, the band gap energy of the synthesized ZnO micro and nanocrystals showed the red shift compared to bulk ZnO. According to the results of a Raman spectroscopy, the enhanced visible light absorption of the ZnO micro and nanocrystals is related to two phenomena: the existence of lattice defects (oxygen vacancies and zinc interstitials), and the particle surface sensitization by different surfactants.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
T1  - Synthesis and characterization of ZnO nano/micro crystals with enhanced sunlight-induced photo-catalytic activity
SP  - 36
EP  - 36
UR  - https://hdl.handle.net/21.15107/rcub_dais_11911
ER  - 

@conference{
author = "Stanković, Ana and Veselinović, Ljiljana and Škapin, Srečo Davor and Marković, Smilja",
year = "2021",
abstract = "It is known that the functional properties of zinc oxide (ZnO) materials depend on their physico-chemical properties, such as optical properties and specific surface area. They are defined with structural characteristics, for example: the particle size and morphology, phase composition, crystallite size, crystallinity degree, as well as the crystal structure ordering, i.e., the presence of structural defects. The primary purpose of this study was to synthesize ZnO powders with various physico-chemical properties by optimizing the reaction conditions in different processing methods. For example, reaction temperature or addition of various surfactants such as polyvinyl alcohol, polyvinyl pyrrolidone, or polyethylene oxide. In this study, to vary physico-chemical properties of ZnO particles, four different synthesis methods were employed: mechanochemical, hydrothermal, ultrasonic and microwave processing. Structural and morphological properties of prepared ZnO powders were characterized using a number of techniques such as: X-ray powder diffraction (XRPD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance and photoluminescence (PL) spectroscopy. One of the functional properties of the synthesized ZnO powders that was particularly examined is photocatalytic activity. In order to examine ZnO as a photocatalyst, photodegradation of methylene blue (MB) dye was carried out under simulated and direct sunlight irradiation. The UV–Vis spectra showed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased absorption, and a slight red-shift of the absorption edge. Besides, the band gap energy of the synthesized ZnO micro and nanocrystals showed the red shift compared to bulk ZnO. According to the results of a Raman spectroscopy, the enhanced visible light absorption of the ZnO micro and nanocrystals is related to two phenomena: the existence of lattice defects (oxygen vacancies and zinc interstitials), and the particle surface sensitization by different surfactants.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021",
title = "Synthesis and characterization of ZnO nano/micro crystals with enhanced sunlight-induced photo-catalytic activity",
pages = "36-36",
url = "https://hdl.handle.net/21.15107/rcub_dais_11911"
}

Stanković, A., Veselinović, L., Škapin, S. D.,& Marković, S.. (2021). Synthesis and characterization of ZnO nano/micro crystals with enhanced sunlight-induced photo-catalytic activity. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021
Belgrade : Serbian Ceramic Society., 36-36.
https://hdl.handle.net/21.15107/rcub_dais_11911

Stanković A, Veselinović L, Škapin SD, Marković S. Synthesis and characterization of ZnO nano/micro crystals with enhanced sunlight-induced photo-catalytic activity. in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021. 2021;:36-36.
https://hdl.handle.net/21.15107/rcub_dais_11911 .

Stanković, Ana, Veselinović, Ljiljana, Škapin, Srečo Davor, Marković, Smilja, "Synthesis and characterization of ZnO nano/micro crystals with enhanced sunlight-induced photo-catalytic activity" in Program and the Book of abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application IX : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 20-21. September 2021 (2021):36-36,
https://hdl.handle.net/21.15107/rcub_dais_11911 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Drvenica, Ivana
AU  - Ristić, B.
AU  - Škapin, Srečo Davor
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12094
AB  - Due to tunable opto-electronic properties ZnO-based nanoparticles (ZnONPs) have been used for application in electronics, optoelectronics, photo(electro)catalysis, etc. Besides, as bio-inert, ZnONPs have a great potential in medicine for biosensing, bioimaging, drug and gene delivery, implants or as antimicrobial and anticancer agents. One of suggested governing mechanism of the biological activities of ZnONPs is based on the formation of reactive oxygen species (ROS). Actually, when ZnONP absorb photon with energy equal or greater than its band gap, electrons (e−) are excited from the valence band (VB) to the conduction band (CB) leaving the holes (h+) in VB. In following, the photogenerated h+ and e− migrate from bulk to surface. The photogenerated h+ at the VB react with water molecules adsorbed at the particle surface to produce hydroxyl radicals (OH•), while e− in CB react with oxygen molecules generating anionic superoxide radicals (O2−•). Radicals can be transformed in highly reactive hydroxyl radicals and so on. Derivatives of this active oxygen can damage the bacterial/tumor cells. However, in sufficiency ROS can damage normal cells as well. Thus, an understanding of ZnONPs crystal structure-activity relationship is crucial for the design of materials safe for application in treating diseases like cancer. In this study we established correlation between the surface-to-bulk defects ratio in ZnONPs and ROS formation. To vary surface-to-bulk defects ratio, series of ZnONP samples were synthesized by microwave processing of precipitate in the presence of a different amount (5, 10 and 20 wt.%) of surfactants, precisely, CTAB and citric acid. The particles crystallinity and phase purity were investigated by X-ray diffraction, Raman and FTIR spectroscopy. The particles morphology and texture properties were observed with FE–SEM and BET, respectively. The optical properties were studied using UV–Vis DRS and PL spectroscopy. ZnONP samples with different surface-to-bulk defect ratio were examined on ROS formation. Surface-to-bulk defect ratio in ZnONP was correlated with ROS formation, besides; their influence on cytotoxicity to normal and cancerous cells was comprehended.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and the Book of abstracts / Twenty-second Annual Conference YUCOMAT 2021 Herceg Novi, Montenegro, August 30 - September 3, 2021
T1  - ZnO nanoparticles with optimized surface-to-bulk defect ratio for potential biomedical application
SP  - 51
EP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_dais_12094
ER  - 

@conference{
author = "Marković, Smilja and Stanković, Ana and Drvenica, Ivana and Ristić, B. and Škapin, Srečo Davor",
year = "2021",
abstract = "Due to tunable opto-electronic properties ZnO-based nanoparticles (ZnONPs) have been used for application in electronics, optoelectronics, photo(electro)catalysis, etc. Besides, as bio-inert, ZnONPs have a great potential in medicine for biosensing, bioimaging, drug and gene delivery, implants or as antimicrobial and anticancer agents. One of suggested governing mechanism of the biological activities of ZnONPs is based on the formation of reactive oxygen species (ROS). Actually, when ZnONP absorb photon with energy equal or greater than its band gap, electrons (e−) are excited from the valence band (VB) to the conduction band (CB) leaving the holes (h+) in VB. In following, the photogenerated h+ and e− migrate from bulk to surface. The photogenerated h+ at the VB react with water molecules adsorbed at the particle surface to produce hydroxyl radicals (OH•), while e− in CB react with oxygen molecules generating anionic superoxide radicals (O2−•). Radicals can be transformed in highly reactive hydroxyl radicals and so on. Derivatives of this active oxygen can damage the bacterial/tumor cells. However, in sufficiency ROS can damage normal cells as well. Thus, an understanding of ZnONPs crystal structure-activity relationship is crucial for the design of materials safe for application in treating diseases like cancer. In this study we established correlation between the surface-to-bulk defects ratio in ZnONPs and ROS formation. To vary surface-to-bulk defects ratio, series of ZnONP samples were synthesized by microwave processing of precipitate in the presence of a different amount (5, 10 and 20 wt.%) of surfactants, precisely, CTAB and citric acid. The particles crystallinity and phase purity were investigated by X-ray diffraction, Raman and FTIR spectroscopy. The particles morphology and texture properties were observed with FE–SEM and BET, respectively. The optical properties were studied using UV–Vis DRS and PL spectroscopy. ZnONP samples with different surface-to-bulk defect ratio were examined on ROS formation. Surface-to-bulk defect ratio in ZnONP was correlated with ROS formation, besides; their influence on cytotoxicity to normal and cancerous cells was comprehended.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and the Book of abstracts / Twenty-second Annual Conference YUCOMAT 2021 Herceg Novi, Montenegro, August 30 - September 3, 2021",
title = "ZnO nanoparticles with optimized surface-to-bulk defect ratio for potential biomedical application",
pages = "51-51",
url = "https://hdl.handle.net/21.15107/rcub_dais_12094"
}

Marković, S., Stanković, A., Drvenica, I., Ristić, B.,& Škapin, S. D.. (2021). ZnO nanoparticles with optimized surface-to-bulk defect ratio for potential biomedical application. in Programme and the Book of abstracts / Twenty-second Annual Conference YUCOMAT 2021 Herceg Novi, Montenegro, August 30 - September 3, 2021
Belgrade : Materials Research Society of Serbia., 51-51.
https://hdl.handle.net/21.15107/rcub_dais_12094

Marković S, Stanković A, Drvenica I, Ristić B, Škapin SD. ZnO nanoparticles with optimized surface-to-bulk defect ratio for potential biomedical application. in Programme and the Book of abstracts / Twenty-second Annual Conference YUCOMAT 2021 Herceg Novi, Montenegro, August 30 - September 3, 2021. 2021;:51-51.
https://hdl.handle.net/21.15107/rcub_dais_12094 .

Marković, Smilja, Stanković, Ana, Drvenica, Ivana, Ristić, B., Škapin, Srečo Davor, "ZnO nanoparticles with optimized surface-to-bulk defect ratio for potential biomedical application" in Programme and the Book of abstracts / Twenty-second Annual Conference YUCOMAT 2021 Herceg Novi, Montenegro, August 30 - September 3, 2021 (2021):51-51,
https://hdl.handle.net/21.15107/rcub_dais_12094 .

TY  - CONF
AU  - Aleksić, Katarina
AU  - Supić, Ivan
AU  - Stojković Simatović, Ivana
AU  - Stanković, Ana
AU  - Marković, Smilja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12274
AB  - The aim of this research was to improve photo(electro)catalytic properties of BaTi1-xSnx (BTS, x = 0, 0.05, 0.10) powders. For that purpose we employed ZnO to prepare ZnO@BTS composite. In situ microwave processing of a ZnO precipitate on previously synthesized BTS particles was used to produce ZnO@BTS composites. The phase composition and crystal structure of BTS, ZnO and ZnO@BTS were examined by X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). The powders particles morphology was investigated by field emission scanning electron microscopy (FESEM). The optical properties were studied using UV-Vis diffuse reflectance (DRS) and photoluminescence spectroscopy (PL). Linear voltammetry was used to examine the photoelectrochemical properties of the materials. Photocatalytic properties were tested based on the decolorization of methylene blue (MB) dye in the presence of powder particles, under the influence of simulated sunlight radiation. BTS powders have good electron transfer properties, which has been shown in their function as electrocatalysts, where they have shown better properties than ZnO and ZnO@BTS composites. In contrast, they showed poor photocatalytic efficacy. The precipitation of ZnO particles on BTS, by the method of microwave processing,
significantly improves the photocatalytic efficiency of the formed composites, concerning the starting BTS powders. Among the composites, ZnO@BT composite proved to be the most effective photocatalyst.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of abstracts / Nineteenth Young Researchers' Conference Materials Science and Engineering, December 1-3, 2021, Belgrade, Serbia
T1  - Investigation of photo(electro)catalytic efficiency of BaTi1-xSnx, ZnO and ZnO@BaTi1-xSnx (x = 0, 0.05, 0.10) powders
SP  - 72
EP  - 72
UR  - https://hdl.handle.net/21.15107/rcub_dais_12274
ER  - 

@conference{
author = "Aleksić, Katarina and Supić, Ivan and Stojković Simatović, Ivana and Stanković, Ana and Marković, Smilja",
year = "2021",
abstract = "The aim of this research was to improve photo(electro)catalytic properties of BaTi1-xSnx (BTS, x = 0, 0.05, 0.10) powders. For that purpose we employed ZnO to prepare ZnO@BTS composite. In situ microwave processing of a ZnO precipitate on previously synthesized BTS particles was used to produce ZnO@BTS composites. The phase composition and crystal structure of BTS, ZnO and ZnO@BTS were examined by X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). The powders particles morphology was investigated by field emission scanning electron microscopy (FESEM). The optical properties were studied using UV-Vis diffuse reflectance (DRS) and photoluminescence spectroscopy (PL). Linear voltammetry was used to examine the photoelectrochemical properties of the materials. Photocatalytic properties were tested based on the decolorization of methylene blue (MB) dye in the presence of powder particles, under the influence of simulated sunlight radiation. BTS powders have good electron transfer properties, which has been shown in their function as electrocatalysts, where they have shown better properties than ZnO and ZnO@BTS composites. In contrast, they showed poor photocatalytic efficacy. The precipitation of ZnO particles on BTS, by the method of microwave processing,
significantly improves the photocatalytic efficiency of the formed composites, concerning the starting BTS powders. Among the composites, ZnO@BT composite proved to be the most effective photocatalyst.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of abstracts / Nineteenth Young Researchers' Conference Materials Science and Engineering, December 1-3, 2021, Belgrade, Serbia",
title = "Investigation of photo(electro)catalytic efficiency of BaTi1-xSnx, ZnO and ZnO@BaTi1-xSnx (x = 0, 0.05, 0.10) powders",
pages = "72-72",
url = "https://hdl.handle.net/21.15107/rcub_dais_12274"
}

Aleksić, K., Supić, I., Stojković Simatović, I., Stanković, A.,& Marković, S.. (2021). Investigation of photo(electro)catalytic efficiency of BaTi1-xSnx, ZnO and ZnO@BaTi1-xSnx (x = 0, 0.05, 0.10) powders. in Program and the Book of abstracts / Nineteenth Young Researchers' Conference Materials Science and Engineering, December 1-3, 2021, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 72-72.
https://hdl.handle.net/21.15107/rcub_dais_12274

Aleksić K, Supić I, Stojković Simatović I, Stanković A, Marković S. Investigation of photo(electro)catalytic efficiency of BaTi1-xSnx, ZnO and ZnO@BaTi1-xSnx (x = 0, 0.05, 0.10) powders. in Program and the Book of abstracts / Nineteenth Young Researchers' Conference Materials Science and Engineering, December 1-3, 2021, Belgrade, Serbia. 2021;:72-72.
https://hdl.handle.net/21.15107/rcub_dais_12274 .

Aleksić, Katarina, Supić, Ivan, Stojković Simatović, Ivana, Stanković, Ana, Marković, Smilja, "Investigation of photo(electro)catalytic efficiency of BaTi1-xSnx, ZnO and ZnO@BaTi1-xSnx (x = 0, 0.05, 0.10) powders" in Program and the Book of abstracts / Nineteenth Young Researchers' Conference Materials Science and Engineering, December 1-3, 2021, Belgrade, Serbia (2021):72-72,
https://hdl.handle.net/21.15107/rcub_dais_12274 .

TY  - CONF
AU  - Stanković, Ana
AU  - Filipović, Suzana
AU  - Stojković Simatović, Ivana
AU  - Škapin, Srečo Davor
AU  - Mančić, Lidija
AU  - Marković, Smilja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12350
AB  - Due to a high-power conversion efficiency (PCE), perovskite solar cells (PSCs) are the most developing area of research in the past decade. Although lead−based inorganic−organic PSCs has achieved the highest PCE of 25.2%, the toxic nature of lead and poor stability of organic components strongly limits its commercialization. This problem can be overcome by developing of inorganic perovskites with a high PCE. Barium titanate (BaTiO3, BT) belongs to the perovskite crystal structure materials with remarkable dielectric, ferroelectric and ferromagnetic properties. In this research, to enhance functional properties of BT we employed functionalization with MEMO silane followed by in-situ alloying with ZnO in different BT to ZnO wt.%. Synthesized ZnO@MEMO@BT composites were tested as photo- and photo-electro catalysts under simulated sunlight irradiation. An enhanced catalytic activity of ZnO@MEMO@BT composites, compared to pure BT is probably due to the modified binding energy and an optimized band structure. In order to investigate the origin of improved catalytic efficiency, pristine BT and composites were characterized using a variety of techniques, including X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance and photoluminescence spectroscopy. The enhanced photo(electro)catalytic activity of the composite materials can be attributed to the synergetic effect of the surface defects and the ZnO/BT heterojunction particles, which enabled charge separation, thereby hindering the recombination of photogenerated carriers.
PB  - Belgrade : Innovation Center of Faculty of Mechanical Engineering
C3  - Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
T1  - BT/ZnO composite materials with improved functional properties
SP  - 81
EP  - 81
UR  - https://hdl.handle.net/21.15107/rcub_dais_12350
ER  - 

@conference{
author = "Stanković, Ana and Filipović, Suzana and Stojković Simatović, Ivana and Škapin, Srečo Davor and Mančić, Lidija and Marković, Smilja",
year = "2021",
abstract = "Due to a high-power conversion efficiency (PCE), perovskite solar cells (PSCs) are the most developing area of research in the past decade. Although lead−based inorganic−organic PSCs has achieved the highest PCE of 25.2%, the toxic nature of lead and poor stability of organic components strongly limits its commercialization. This problem can be overcome by developing of inorganic perovskites with a high PCE. Barium titanate (BaTiO3, BT) belongs to the perovskite crystal structure materials with remarkable dielectric, ferroelectric and ferromagnetic properties. In this research, to enhance functional properties of BT we employed functionalization with MEMO silane followed by in-situ alloying with ZnO in different BT to ZnO wt.%. Synthesized ZnO@MEMO@BT composites were tested as photo- and photo-electro catalysts under simulated sunlight irradiation. An enhanced catalytic activity of ZnO@MEMO@BT composites, compared to pure BT is probably due to the modified binding energy and an optimized band structure. In order to investigate the origin of improved catalytic efficiency, pristine BT and composites were characterized using a variety of techniques, including X-ray powder diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), UV-Vis diffuse reflectance and photoluminescence spectroscopy. The enhanced photo(electro)catalytic activity of the composite materials can be attributed to the synergetic effect of the surface defects and the ZnO/BT heterojunction particles, which enabled charge separation, thereby hindering the recombination of photogenerated carriers.",
publisher = "Belgrade : Innovation Center of Faculty of Mechanical Engineering",
journal = "Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia",
title = "BT/ZnO composite materials with improved functional properties",
pages = "81-81",
url = "https://hdl.handle.net/21.15107/rcub_dais_12350"
}

Stanković, A., Filipović, S., Stojković Simatović, I., Škapin, S. D., Mančić, L.,& Marković, S.. (2021). BT/ZnO composite materials with improved functional properties. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia
Belgrade : Innovation Center of Faculty of Mechanical Engineering., 81-81.
https://hdl.handle.net/21.15107/rcub_dais_12350

Stanković A, Filipović S, Stojković Simatović I, Škapin SD, Mančić L, Marković S. BT/ZnO composite materials with improved functional properties. in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia. 2021;:81-81.
https://hdl.handle.net/21.15107/rcub_dais_12350 .

Stanković, Ana, Filipović, Suzana, Stojković Simatović, Ivana, Škapin, Srečo Davor, Mančić, Lidija, Marković, Smilja, "BT/ZnO composite materials with improved functional properties" in Programme and The Book of Abstracts / International Conference of Experimental and Numerical Investigations and New Technologies - CNN TECH 2021,29 June - 02 July 2021, Zlatibor, Serbia (2021):81-81,
https://hdl.handle.net/21.15107/rcub_dais_12350 .

TY  - JOUR
AU  - Stanković, Ana
AU  - Jovanović, Sonja
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12384
AB  - Rastvorljivost lekova predstavlja veoma važno svojstvo koje direktno utiče na njihovu primenu. S obzirom na činjenicu da rastvorljivost može delovati kao ograničavajući faktor u procesu apsorpcije leka, takođe može uticati i na njegovu bioraspoloživost. Više od 40% potencijalnih lekova su slabo rastvorni u vodi što ima za posledicu da važni farmaceutski proizvodi ne ostvare komercijalnu primenu ili ne postižu svoj potpuni potencijal. U ovom radu ispitivana je mogućnost poboljšanja rastvorljivosti verapamil hidrohlorida (VHCl) primenom mehanohemijskog tretmana. Uticaj mehanohemijskog procesiranja na fizičkohemijska svojstva VHCl-a ispitan je primenom metoda XRPD, FTIR i Ramanske spektroskopije, kao i FESEM analize. Osim toga, određena je i raspodela veličina čestica. Rastvorljivost VHCl prahova nakon mehanohemijskog procesiranja određena je UV-Vis spektrofotometrijom. Konačno, rastvorljivost VHCl je korelisana sa srednjom veličinom čestica, strukturnim i morfološkim karakteristikama.
AB  - Dissolution of drugs is a very important factor that directly affects their potential application. Due to the fact that solubility may act as a limiting factor in the process of absorption of the drug, it can also affect its bio-availableness. More than 40 percent of potential drugs have a property of a poor solubility in the water, resulting in potentially important pharmaceutical products not reaching patients or reaching their full potential. This work examined the possibility of improving the solubility of verapamil hydrochloride (VHCl) by applying mechanochemical treatment. The impact of mechanochemical treatment on physiochemical properties was comprehended by applying XRPD, FTIR and Raman spectroscopy, as well as FESEM analysis. Besides, particle size distribution was determined. Solubility of verapamil hydrochloride was determined by using UV-VIS spectroscopy. Finally, the solubility of verapamil hydrochloride was correlated with particle size distribution, structural and morphological characteristics.
PB  - Centre for Evaluation in Education and Science (CEON/CEES)
T2  - Tehnika
T1  - Ispitivanje uticaja mehanohemijskog procesiranja na rastvorljivost verapamil hidrohlorida
SP  - 9
EP  - 14
VL  - 76
IS  - 1
DO  - 10.5937/tehnika2101009S
UR  - https://hdl.handle.net/21.15107/rcub_dais_12384
ER  - 

@article{
author = "Stanković, Ana and Jovanović, Sonja",
year = "2021",
abstract = "Rastvorljivost lekova predstavlja veoma važno svojstvo koje direktno utiče na njihovu primenu. S obzirom na činjenicu da rastvorljivost može delovati kao ograničavajući faktor u procesu apsorpcije leka, takođe može uticati i na njegovu bioraspoloživost. Više od 40% potencijalnih lekova su slabo rastvorni u vodi što ima za posledicu da važni farmaceutski proizvodi ne ostvare komercijalnu primenu ili ne postižu svoj potpuni potencijal. U ovom radu ispitivana je mogućnost poboljšanja rastvorljivosti verapamil hidrohlorida (VHCl) primenom mehanohemijskog tretmana. Uticaj mehanohemijskog procesiranja na fizičkohemijska svojstva VHCl-a ispitan je primenom metoda XRPD, FTIR i Ramanske spektroskopije, kao i FESEM analize. Osim toga, određena je i raspodela veličina čestica. Rastvorljivost VHCl prahova nakon mehanohemijskog procesiranja određena je UV-Vis spektrofotometrijom. Konačno, rastvorljivost VHCl je korelisana sa srednjom veličinom čestica, strukturnim i morfološkim karakteristikama., Dissolution of drugs is a very important factor that directly affects their potential application. Due to the fact that solubility may act as a limiting factor in the process of absorption of the drug, it can also affect its bio-availableness. More than 40 percent of potential drugs have a property of a poor solubility in the water, resulting in potentially important pharmaceutical products not reaching patients or reaching their full potential. This work examined the possibility of improving the solubility of verapamil hydrochloride (VHCl) by applying mechanochemical treatment. The impact of mechanochemical treatment on physiochemical properties was comprehended by applying XRPD, FTIR and Raman spectroscopy, as well as FESEM analysis. Besides, particle size distribution was determined. Solubility of verapamil hydrochloride was determined by using UV-VIS spectroscopy. Finally, the solubility of verapamil hydrochloride was correlated with particle size distribution, structural and morphological characteristics.",
publisher = "Centre for Evaluation in Education and Science (CEON/CEES)",
journal = "Tehnika",
title = "Ispitivanje uticaja mehanohemijskog procesiranja na rastvorljivost verapamil hidrohlorida",
pages = "9-14",
volume = "76",
number = "1",
doi = "10.5937/tehnika2101009S",
url = "https://hdl.handle.net/21.15107/rcub_dais_12384"
}

Stanković, A.,& Jovanović, S.. (2021). Ispitivanje uticaja mehanohemijskog procesiranja na rastvorljivost verapamil hidrohlorida. in Tehnika
Centre for Evaluation in Education and Science (CEON/CEES)., 76(1), 9-14.
https://doi.org/10.5937/tehnika2101009S
https://hdl.handle.net/21.15107/rcub_dais_12384

Stanković A, Jovanović S. Ispitivanje uticaja mehanohemijskog procesiranja na rastvorljivost verapamil hidrohlorida. in Tehnika. 2021;76(1):9-14.
doi:10.5937/tehnika2101009S
https://hdl.handle.net/21.15107/rcub_dais_12384 .

Stanković, Ana, Jovanović, Sonja, "Ispitivanje uticaja mehanohemijskog procesiranja na rastvorljivost verapamil hidrohlorida" in Tehnika, 76, no. 1 (2021):9-14,
https://doi.org/10.5937/tehnika2101009S .,
https://hdl.handle.net/21.15107/rcub_dais_12384 .

TY  - JOUR
AU  - Janićijević, Željko
AU  - Stanković, Ana
AU  - Žegura, Bojana
AU  - Veljović, Đorđe
AU  - Đekić, Ljiljana
AU  - Krajišnik, Danina
AU  - Filipič, Metka
AU  - Stevanović, Magdalena
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/12339
AB  - We report an innovative low-cost wet  precipitation  synthesis  method  for  gelatin-modified   zinc oxide nanoparticles (GM ZnO NPs) at the inter- face  between  the  gelatin  hydrogel  and  aqueous  elec- trolyte.  Diffusion  of  ammonia  through  the  hydrogel   matrices with different gelatin contents induced pre- cipitation  of  the  product  in  contact  with  the  surface   of  the  aqueous  solution  of  zinc  ions.  The  obtained   precipitate  was  subjected  to  thermal  treatment  to  partially  decompose  the  adsorbed  gelatin  in  the  NP   structure. Physicochemical properties of obtained  GM  ZnO  NPs  were  characterized  by  X-ray  powder   diffraction (XRD), scanning electron microscopy  (SEM), Fourier transform infrared spectroscopy  (FTIR), differential thermal analysis (DTA), thermo- gravimetry (TG), photon correlation spectroscopy  (PCS),  zeta  potential  measurements,  and  inductively   coupled  plasma-mass  spectrometry  (ICP-MS).  The   estimated mean crystallite size of GM ZnO NP pow- ders was in the range from 5.8 to 12.1 nm. The syn- thesized  NPs  exhibited  nanosheet  morphology  and   arranged into flake-like aggregates. The toxic poten- tial was investigated in vitro in human hepatocellular  carcinoma cell line HepG2. The thiazolyl blue tetra- zolium bromide (MTS) assay was used to assess cell  viability,  2′,7′-dichlor-fluorescein-diacetate  (DCFH- DA)  assay  to  examine  the  formation  of  intracellu- lar  reactive  oxygen  species  (ROS),  and  comet  assay   to  evaluate  the  genotoxic  response.  GM  ZnO  NPs   slightly reduced HepG2 cell viability, did not induce  ROS formation, and showed low genotoxic potential  at  very  high  doses  (100  μg    mL−1).  ZnO  NPs  fabri- cated  and  modified  using  the  proposed  methodol- ogy deserve further study as potential candidates for  antibacterial agents or dietary supplements with low  overall toxicity.
PB  - Springer Science and Business Media B.V.
T2  - Journal of Nanoparticle Research
T1  - Safe-by-design gelatin-modified zinc oxide nanoparticles
VL  - 23
IS  - 9
DO  - 10.1007/s11051-021-05312-3
UR  - https://hdl.handle.net/21.15107/rcub_dais_12339
ER  - 

@article{
author = "Janićijević, Željko and Stanković, Ana and Žegura, Bojana and Veljović, Đorđe and Đekić, Ljiljana and Krajišnik, Danina and Filipič, Metka and Stevanović, Magdalena",
year = "2021",
abstract = "We report an innovative low-cost wet  precipitation  synthesis  method  for  gelatin-modified   zinc oxide nanoparticles (GM ZnO NPs) at the inter- face  between  the  gelatin  hydrogel  and  aqueous  elec- trolyte.  Diffusion  of  ammonia  through  the  hydrogel   matrices with different gelatin contents induced pre- cipitation  of  the  product  in  contact  with  the  surface   of  the  aqueous  solution  of  zinc  ions.  The  obtained   precipitate  was  subjected  to  thermal  treatment  to  partially  decompose  the  adsorbed  gelatin  in  the  NP   structure. Physicochemical properties of obtained  GM  ZnO  NPs  were  characterized  by  X-ray  powder   diffraction (XRD), scanning electron microscopy  (SEM), Fourier transform infrared spectroscopy  (FTIR), differential thermal analysis (DTA), thermo- gravimetry (TG), photon correlation spectroscopy  (PCS),  zeta  potential  measurements,  and  inductively   coupled  plasma-mass  spectrometry  (ICP-MS).  The   estimated mean crystallite size of GM ZnO NP pow- ders was in the range from 5.8 to 12.1 nm. The syn- thesized  NPs  exhibited  nanosheet  morphology  and   arranged into flake-like aggregates. The toxic poten- tial was investigated in vitro in human hepatocellular  carcinoma cell line HepG2. The thiazolyl blue tetra- zolium bromide (MTS) assay was used to assess cell  viability,  2′,7′-dichlor-fluorescein-diacetate  (DCFH- DA)  assay  to  examine  the  formation  of  intracellu- lar  reactive  oxygen  species  (ROS),  and  comet  assay   to  evaluate  the  genotoxic  response.  GM  ZnO  NPs   slightly reduced HepG2 cell viability, did not induce  ROS formation, and showed low genotoxic potential  at  very  high  doses  (100  μg    mL−1).  ZnO  NPs  fabri- cated  and  modified  using  the  proposed  methodol- ogy deserve further study as potential candidates for  antibacterial agents or dietary supplements with low  overall toxicity.",
publisher = "Springer Science and Business Media B.V.",
journal = "Journal of Nanoparticle Research",
title = "Safe-by-design gelatin-modified zinc oxide nanoparticles",
volume = "23",
number = "9",
doi = "10.1007/s11051-021-05312-3",
url = "https://hdl.handle.net/21.15107/rcub_dais_12339"
}

Janićijević, Ž., Stanković, A., Žegura, B., Veljović, Đ., Đekić, L., Krajišnik, D., Filipič, M.,& Stevanović, M.. (2021). Safe-by-design gelatin-modified zinc oxide nanoparticles. in Journal of Nanoparticle Research
Springer Science and Business Media B.V.., 23(9).
https://doi.org/10.1007/s11051-021-05312-3
https://hdl.handle.net/21.15107/rcub_dais_12339

Janićijević Ž, Stanković A, Žegura B, Veljović Đ, Đekić L, Krajišnik D, Filipič M, Stevanović M. Safe-by-design gelatin-modified zinc oxide nanoparticles. in Journal of Nanoparticle Research. 2021;23(9).
doi:10.1007/s11051-021-05312-3
https://hdl.handle.net/21.15107/rcub_dais_12339 .

Janićijević, Željko, Stanković, Ana, Žegura, Bojana, Veljović, Đorđe, Đekić, Ljiljana, Krajišnik, Danina, Filipič, Metka, Stevanović, Magdalena, "Safe-by-design gelatin-modified zinc oxide nanoparticles" in Journal of Nanoparticle Research, 23, no. 9 (2021),
https://doi.org/10.1007/s11051-021-05312-3 .,
https://hdl.handle.net/21.15107/rcub_dais_12339 .

TY  - JOUR
AU  - Janićijević, Željko
AU  - Stanković, Ana
AU  - Žegura, Bojana
AU  - Veljović, Đorđe
AU  - Đekić, Ljiljana
AU  - Krajišnik, Danina
AU  - Filipič, Metka
AU  - Stevanović, Magdalena
PY  - 2021
UR  - https://dais.sanu.ac.rs/123456789/11876
AB  - We report an innovative low-cost wet  precipitation  synthesis  method  for  gelatin-modified   zinc oxide nanoparticles (GM ZnO NPs) at the inter- face  between  the  gelatin  hydrogel  and  aqueous  elec- trolyte.  Diffusion  of  ammonia  through  the  hydrogel   matrices with different gelatin contents induced pre- cipitation  of  the  product  in  contact  with  the  surface   of  the  aqueous  solution  of  zinc  ions.  The  obtained   precipitate  was  subjected  to  thermal  treatment  to  partially  decompose  the  adsorbed  gelatin  in  the  NP   structure. Physicochemical properties of obtained  GM  ZnO  NPs  were  characterized  by  X-ray  powder   diffraction (XRD), scanning electron microscopy  (SEM), Fourier transform infrared spectroscopy  (FTIR), differential thermal analysis (DTA), thermo- gravimetry (TG), photon correlation spectroscopy  (PCS),  zeta  potential  measurements,  and  inductively   coupled  plasma-mass  spectrometry  (ICP-MS).  The   estimated mean crystallite size of GM ZnO NP pow- ders was in the range from 5.8 to 12.1 nm. The syn- thesized  NPs  exhibited  nanosheet  morphology  and   arranged into flake-like aggregates. The toxic poten- tial was investigated in vitro in human hepatocellular  carcinoma cell line HepG2. The thiazolyl blue tetra- zolium bromide (MTS) assay was used to assess cell  viability,  2′,7′-dichlor-fluorescein-diacetate  (DCFH- DA)  assay  to  examine  the  formation  of  intracellu- lar  reactive  oxygen  species  (ROS),  and  comet  assay   to  evaluate  the  genotoxic  response.  GM  ZnO  NPs   slightly reduced HepG2 cell viability, did not induce  ROS formation, and showed low genotoxic potential  at  very  high  doses  (100  μg    mL−1).  ZnO  NPs  fabri- cated  and  modified  using  the  proposed  methodol- ogy deserve further study as potential candidates for  antibacterial agents or dietary supplements with low  overall toxicity.
PB  - Springer Science and Business Media B.V.
T2  - Journal of Nanoparticle Research
T1  - Safe-by-design gelatin-modified zinc oxide nanoparticles
VL  - 23
IS  - 9
DO  - 10.1007/s11051-021-05312-3
UR  - https://hdl.handle.net/21.15107/rcub_dais_11876
ER  - 

@article{
author = "Janićijević, Željko and Stanković, Ana and Žegura, Bojana and Veljović, Đorđe and Đekić, Ljiljana and Krajišnik, Danina and Filipič, Metka and Stevanović, Magdalena",
year = "2021",
abstract = "We report an innovative low-cost wet  precipitation  synthesis  method  for  gelatin-modified   zinc oxide nanoparticles (GM ZnO NPs) at the inter- face  between  the  gelatin  hydrogel  and  aqueous  elec- trolyte.  Diffusion  of  ammonia  through  the  hydrogel   matrices with different gelatin contents induced pre- cipitation  of  the  product  in  contact  with  the  surface   of  the  aqueous  solution  of  zinc  ions.  The  obtained   precipitate  was  subjected  to  thermal  treatment  to  partially  decompose  the  adsorbed  gelatin  in  the  NP   structure. Physicochemical properties of obtained  GM  ZnO  NPs  were  characterized  by  X-ray  powder   diffraction (XRD), scanning electron microscopy  (SEM), Fourier transform infrared spectroscopy  (FTIR), differential thermal analysis (DTA), thermo- gravimetry (TG), photon correlation spectroscopy  (PCS),  zeta  potential  measurements,  and  inductively   coupled  plasma-mass  spectrometry  (ICP-MS).  The   estimated mean crystallite size of GM ZnO NP pow- ders was in the range from 5.8 to 12.1 nm. The syn- thesized  NPs  exhibited  nanosheet  morphology  and   arranged into flake-like aggregates. The toxic poten- tial was investigated in vitro in human hepatocellular  carcinoma cell line HepG2. The thiazolyl blue tetra- zolium bromide (MTS) assay was used to assess cell  viability,  2′,7′-dichlor-fluorescein-diacetate  (DCFH- DA)  assay  to  examine  the  formation  of  intracellu- lar  reactive  oxygen  species  (ROS),  and  comet  assay   to  evaluate  the  genotoxic  response.  GM  ZnO  NPs   slightly reduced HepG2 cell viability, did not induce  ROS formation, and showed low genotoxic potential  at  very  high  doses  (100  μg    mL−1).  ZnO  NPs  fabri- cated  and  modified  using  the  proposed  methodol- ogy deserve further study as potential candidates for  antibacterial agents or dietary supplements with low  overall toxicity.",
publisher = "Springer Science and Business Media B.V.",
journal = "Journal of Nanoparticle Research",
title = "Safe-by-design gelatin-modified zinc oxide nanoparticles",
volume = "23",
number = "9",
doi = "10.1007/s11051-021-05312-3",
url = "https://hdl.handle.net/21.15107/rcub_dais_11876"
}

Janićijević, Ž., Stanković, A., Žegura, B., Veljović, Đ., Đekić, L., Krajišnik, D., Filipič, M.,& Stevanović, M.. (2021). Safe-by-design gelatin-modified zinc oxide nanoparticles. in Journal of Nanoparticle Research
Springer Science and Business Media B.V.., 23(9).
https://doi.org/10.1007/s11051-021-05312-3
https://hdl.handle.net/21.15107/rcub_dais_11876

Janićijević Ž, Stanković A, Žegura B, Veljović Đ, Đekić L, Krajišnik D, Filipič M, Stevanović M. Safe-by-design gelatin-modified zinc oxide nanoparticles. in Journal of Nanoparticle Research. 2021;23(9).
doi:10.1007/s11051-021-05312-3
https://hdl.handle.net/21.15107/rcub_dais_11876 .

Janićijević, Željko, Stanković, Ana, Žegura, Bojana, Veljović, Đorđe, Đekić, Ljiljana, Krajišnik, Danina, Filipič, Metka, Stevanović, Magdalena, "Safe-by-design gelatin-modified zinc oxide nanoparticles" in Journal of Nanoparticle Research, 23, no. 9 (2021),
https://doi.org/10.1007/s11051-021-05312-3 .,
https://hdl.handle.net/21.15107/rcub_dais_11876 .

TY  - CHAP
AU  - Stevanović, Magdalena
AU  - Lukić, Miodrag J.
AU  - Stanković, Ana
AU  - Filipović, Nenad
AU  - Kuzmanović, Maja
AU  - Janićijević, Željko
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/B9780081028148000019
UR  - https://dais.sanu.ac.rs/123456789/5760
AB  - Nanotechnology has great potential in the biomedical field. Among other nanomaterials, inorganic nanoparticles have become extremely important since they possess unique physicochemical properties influenced by their specific surface structure. Consequently, inorganic nanoparticles exhibit enhanced functionalities such as biological response, antibacterial and antiviral properties, as well as optical, magnetic, and electrical responses. They have found applications in medicine, pharmacy, controlled drug delivery, optics, electronics, etc. In this chapter, reports on obtaining different metallic and ceramic inorganic nanoparticles such as gold, silver, selenium, copper, iron, zinc oxide, and hydroxyapatite for biomedical applications will be addressed. For each of these nanosystems, the main challenges regarding the currently achieved functional properties and further perspectives will also be presented.
PB  - Elsevier
T2  - Materials for Biomedical Engineering
T1  - Chapter 1 - Biomedical inorganic nanoparticles: preparation, properties, and perspectives
SP  - 1
EP  - 46
DO  - 10.1016/B978-0-08-102814-8.00001-9
UR  - https://hdl.handle.net/21.15107/rcub_dais_5760
ER  - 

@inbook{
author = "Stevanović, Magdalena and Lukić, Miodrag J. and Stanković, Ana and Filipović, Nenad and Kuzmanović, Maja and Janićijević, Željko",
year = "2019",
abstract = "Nanotechnology has great potential in the biomedical field. Among other nanomaterials, inorganic nanoparticles have become extremely important since they possess unique physicochemical properties influenced by their specific surface structure. Consequently, inorganic nanoparticles exhibit enhanced functionalities such as biological response, antibacterial and antiviral properties, as well as optical, magnetic, and electrical responses. They have found applications in medicine, pharmacy, controlled drug delivery, optics, electronics, etc. In this chapter, reports on obtaining different metallic and ceramic inorganic nanoparticles such as gold, silver, selenium, copper, iron, zinc oxide, and hydroxyapatite for biomedical applications will be addressed. For each of these nanosystems, the main challenges regarding the currently achieved functional properties and further perspectives will also be presented.",
publisher = "Elsevier",
journal = "Materials for Biomedical Engineering",
booktitle = "Chapter 1 - Biomedical inorganic nanoparticles: preparation, properties, and perspectives",
pages = "1-46",
doi = "10.1016/B978-0-08-102814-8.00001-9",
url = "https://hdl.handle.net/21.15107/rcub_dais_5760"
}

Stevanović, M., Lukić, M. J., Stanković, A., Filipović, N., Kuzmanović, M.,& Janićijević, Ž.. (2019). Chapter 1 - Biomedical inorganic nanoparticles: preparation, properties, and perspectives. in Materials for Biomedical Engineering
Elsevier., 1-46.
https://doi.org/10.1016/B978-0-08-102814-8.00001-9
https://hdl.handle.net/21.15107/rcub_dais_5760

Stevanović M, Lukić MJ, Stanković A, Filipović N, Kuzmanović M, Janićijević Ž. Chapter 1 - Biomedical inorganic nanoparticles: preparation, properties, and perspectives. in Materials for Biomedical Engineering. 2019;:1-46.
doi:10.1016/B978-0-08-102814-8.00001-9
https://hdl.handle.net/21.15107/rcub_dais_5760 .

Stevanović, Magdalena, Lukić, Miodrag J., Stanković, Ana, Filipović, Nenad, Kuzmanović, Maja, Janićijević, Željko, "Chapter 1 - Biomedical inorganic nanoparticles: preparation, properties, and perspectives" in Materials for Biomedical Engineering (2019):1-46,
https://doi.org/10.1016/B978-0-08-102814-8.00001-9 .,
https://hdl.handle.net/21.15107/rcub_dais_5760 .

TY  - CONF
AU  - Janićijević, Željko
AU  - Stanković, Ana
AU  - Žegura, Bojana
AU  - Veljović, Đorđe
AU  - Filipič, Metka
AU  - Stevanović, Magdalena
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6968
AB  - Nanostructured zinc oxides are promising materials for numerous biomedical applications where they can serve as therapeutic agents or tools for sensing and imaging. Despite their favorable properties, wider use of zinc oxide nanoparticles in biomedicine is limited by toxicity issues. Therefore, new synthesis approaches should be devised to obtain zinc oxide nanoparticles which are safe-by-design. We present an innovative low-cost wet precipitation synthesis of gelatin modified zinc oxide nanoparticles at the gel/liquid interface. The diffusion of ammonia through the gelatin hydrogels of different porosities induces precipitation of the product in contact with the surface of the aqueous solution of zinc ions. After thermal treatment of the precipitate, adsorbed organic residues of decomposed gelatin act as modifiers of zinc oxide nanoparticles. We characterized the physicochemical properties of obtained gelatin modified zinc oxide nanoparticles by XRD, FTIR, DTA/TG, and SEM. The synthesized nanoparticles show hexagonal wurtzite structure and form flakelike aggregates. FTIR and DTA/TG analyses indicate that the thermal decomposition of adsorbed gelatin depends on the gelatin content of the hydrogel used in the synthesis. We also examined the viability of HepG2 cells, generation of intracellular reactive oxygen species, and genotoxicity using the MTS, DCFH-DA, and alkaline comet assay, respectively. Fabricated gelatin modified zinc oxide nanoparticles show very low toxicity potential at doses relevant for human exposure.
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  - Synthesis, characterization and toxicity studies of gelatin modified zinc oxide nanoparticles
SP  - 3
EP  - 3
UR  - https://hdl.handle.net/21.15107/rcub_dais_6968
ER  - 

@conference{
author = "Janićijević, Željko and Stanković, Ana and Žegura, Bojana and Veljović, Đorđe and Filipič, Metka and Stevanović, Magdalena",
year = "2019",
abstract = "Nanostructured zinc oxides are promising materials for numerous biomedical applications where they can serve as therapeutic agents or tools for sensing and imaging. Despite their favorable properties, wider use of zinc oxide nanoparticles in biomedicine is limited by toxicity issues. Therefore, new synthesis approaches should be devised to obtain zinc oxide nanoparticles which are safe-by-design. We present an innovative low-cost wet precipitation synthesis of gelatin modified zinc oxide nanoparticles at the gel/liquid interface. The diffusion of ammonia through the gelatin hydrogels of different porosities induces precipitation of the product in contact with the surface of the aqueous solution of zinc ions. After thermal treatment of the precipitate, adsorbed organic residues of decomposed gelatin act as modifiers of zinc oxide nanoparticles. We characterized the physicochemical properties of obtained gelatin modified zinc oxide nanoparticles by XRD, FTIR, DTA/TG, and SEM. The synthesized nanoparticles show hexagonal wurtzite structure and form flakelike aggregates. FTIR and DTA/TG analyses indicate that the thermal decomposition of adsorbed gelatin depends on the gelatin content of the hydrogel used in the synthesis. We also examined the viability of HepG2 cells, generation of intracellular reactive oxygen species, and genotoxicity using the MTS, DCFH-DA, and alkaline comet assay, respectively. Fabricated gelatin modified zinc oxide nanoparticles show very low toxicity potential at doses relevant for human exposure.",
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 = "Synthesis, characterization and toxicity studies of gelatin modified zinc oxide nanoparticles",
pages = "3-3",
url = "https://hdl.handle.net/21.15107/rcub_dais_6968"
}

Janićijević, Ž., Stanković, A., Žegura, B., Veljović, Đ., Filipič, M.,& Stevanović, M.. (2019). Synthesis, characterization and toxicity studies of gelatin modified zinc oxide nanoparticles. 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., 3-3.
https://hdl.handle.net/21.15107/rcub_dais_6968

Janićijević Ž, Stanković A, Žegura B, Veljović Đ, Filipič M, Stevanović M. Synthesis, characterization and toxicity studies of gelatin modified zinc oxide nanoparticles. in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia. 2019;:3-3.
https://hdl.handle.net/21.15107/rcub_dais_6968 .

Janićijević, Željko, Stanković, Ana, Žegura, Bojana, Veljović, Đorđe, Filipič, Metka, Stevanović, Magdalena, "Synthesis, characterization and toxicity studies of gelatin modified zinc oxide nanoparticles" in Program and the Book of abstracts / Eighteenth Young Researchers' Conference Materials Sciences and Engineering, December 4-6, 2019, Belgrade, Serbia (2019):3-3,
https://hdl.handle.net/21.15107/rcub_dais_6968 .

TY  - CONF
AU  - Stanković, Ana
AU  - Drvenica, Ivana
AU  - Đukić Vuković, Aleksandra
AU  - Marković, Smilja
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/7009
AB  - Owing to a wide band gap energy (3.37 eV at RT) and a large exciton binding energy (60 meV), ZnO nanoparticles (ZnONP) have a diverse application, e.g. in electronics, optoelectronics, photocatalysis. Besides, ZnONP have a great potential in medicine for bioimaging, drug/gene delivery or as antimicrobial and anticancer agents. One of suggested governing mechanisms of the mentioned biological activities of ZnONP is based on formation of reactive oxygen species (ROS). When ZnONP absorb photon with energy equal or greater than its band gap, electrons are excited from the valence band (VB) to the conduction band (CB) leaving the holes in VB. Furthermore, the photogenerated holes (h+) and electrons (e-) migrate from bulk to surface. The photogenerated holes at the VB react with water molecules adsorbed at the particle surface to produce hydroxyl radical, while electrons in CB react with oxygen molecules generating anionic superoxide radical O2 -•. Superoxide radicals can be transformed in highly reactive OH• and so on [1]. Derivatives of this active oxygen can damage the bacterial/tumor cells [2]. However, in sufficiency ROS can damage normal cells as well. Thus, an understanding of ZnONP crystal structure-activity relationship and mechanism of ZnONP-related products formation and their consequent activity is crucial for the design of safe ZnONP based biomaterial for application in treating diseases like cancer. A series of ZnONP samples were synthesized by microwave processing of precipitate in the presence of a small amount (5 wt.%) of surfactants CTAB and citric acid. The particles crystallinity and purity were investigated by X-ray diffraction, Raman and ATR-FTIR spectroscopy. The 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. ZnONP samples with different surface-to-bulk defect ratio were examined on ROS formation and antimicrobial activity. Future studies will be conducted with an aim to correlate surface-to-bulk defect ratio in ZnONP with mechanism of ROS formation and their cytotoxicity to normal and cancerous cells.
C3  - Book of Abstracts / First CA17140 COST Conference Cancer Nanomedicine – from the Bench to the Bedside, October 15-17, 2019, Bellevue Park Hotel, Riga, Latvia
T1  - Surfactant-Assisted Microwave Processed ZnO Nanoparticles with Optimized Surface-to-Bulk Defect Ratio For Potential Biomedical Application
SP  - 93
EP  - 93
UR  - https://hdl.handle.net/21.15107/rcub_dais_7009
ER  - 

@conference{
author = "Stanković, Ana and Drvenica, Ivana and Đukić Vuković, Aleksandra and Marković, Smilja",
year = "2019",
abstract = "Owing to a wide band gap energy (3.37 eV at RT) and a large exciton binding energy (60 meV), ZnO nanoparticles (ZnONP) have a diverse application, e.g. in electronics, optoelectronics, photocatalysis. Besides, ZnONP have a great potential in medicine for bioimaging, drug/gene delivery or as antimicrobial and anticancer agents. One of suggested governing mechanisms of the mentioned biological activities of ZnONP is based on formation of reactive oxygen species (ROS). When ZnONP absorb photon with energy equal or greater than its band gap, electrons are excited from the valence band (VB) to the conduction band (CB) leaving the holes in VB. Furthermore, the photogenerated holes (h+) and electrons (e-) migrate from bulk to surface. The photogenerated holes at the VB react with water molecules adsorbed at the particle surface to produce hydroxyl radical, while electrons in CB react with oxygen molecules generating anionic superoxide radical O2 -•. Superoxide radicals can be transformed in highly reactive OH• and so on [1]. Derivatives of this active oxygen can damage the bacterial/tumor cells [2]. However, in sufficiency ROS can damage normal cells as well. Thus, an understanding of ZnONP crystal structure-activity relationship and mechanism of ZnONP-related products formation and their consequent activity is crucial for the design of safe ZnONP based biomaterial for application in treating diseases like cancer. A series of ZnONP samples were synthesized by microwave processing of precipitate in the presence of a small amount (5 wt.%) of surfactants CTAB and citric acid. The particles crystallinity and purity were investigated by X-ray diffraction, Raman and ATR-FTIR spectroscopy. The 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. ZnONP samples with different surface-to-bulk defect ratio were examined on ROS formation and antimicrobial activity. Future studies will be conducted with an aim to correlate surface-to-bulk defect ratio in ZnONP with mechanism of ROS formation and their cytotoxicity to normal and cancerous cells.",
journal = "Book of Abstracts / First CA17140 COST Conference Cancer Nanomedicine – from the Bench to the Bedside, October 15-17, 2019, Bellevue Park Hotel, Riga, Latvia",
title = "Surfactant-Assisted Microwave Processed ZnO Nanoparticles with Optimized Surface-to-Bulk Defect Ratio For Potential Biomedical Application",
pages = "93-93",
url = "https://hdl.handle.net/21.15107/rcub_dais_7009"
}

Stanković, A., Drvenica, I., Đukić Vuković, A.,& Marković, S.. (2019). Surfactant-Assisted Microwave Processed ZnO Nanoparticles with Optimized Surface-to-Bulk Defect Ratio For Potential Biomedical Application. in Book of Abstracts / First CA17140 COST Conference Cancer Nanomedicine – from the Bench to the Bedside, October 15-17, 2019, Bellevue Park Hotel, Riga, Latvia, 93-93.
https://hdl.handle.net/21.15107/rcub_dais_7009

Stanković A, Drvenica I, Đukić Vuković A, Marković S. Surfactant-Assisted Microwave Processed ZnO Nanoparticles with Optimized Surface-to-Bulk Defect Ratio For Potential Biomedical Application. in Book of Abstracts / First CA17140 COST Conference Cancer Nanomedicine – from the Bench to the Bedside, October 15-17, 2019, Bellevue Park Hotel, Riga, Latvia. 2019;:93-93.
https://hdl.handle.net/21.15107/rcub_dais_7009 .

Stanković, Ana, Drvenica, Ivana, Đukić Vuković, Aleksandra, Marković, Smilja, "Surfactant-Assisted Microwave Processed ZnO Nanoparticles with Optimized Surface-to-Bulk Defect Ratio For Potential Biomedical Application" in Book of Abstracts / First CA17140 COST Conference Cancer Nanomedicine – from the Bench to the Bedside, October 15-17, 2019, Bellevue Park Hotel, Riga, Latvia (2019):93-93,
https://hdl.handle.net/21.15107/rcub_dais_7009 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stojković Simatović, Ivana
AU  - Stanković, Ana
AU  - Škapin, Srečo Davor
AU  - Mančić, Lidija
AU  - Mentus, Slavko
AU  - Uskoković, Dragan
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3631
AB  - Due to their high photoactivity, photostability, chemical inertness, simple syntheses procedures as well as low cost, semiconductor materials such as TiO2, ZnO, V2O5, and SnO2, are recognized as materials with a great potential for photoelectrochemical and photocatalytic applications. In particular, they can be used as photoanode in the process of photoelectrolysis of water, or to initiate decomposition of different organic or biological pollutants in water under light irradiation. Which wavelength of light will be absorbed depends on the semiconductor band gap; semiconductors with a wide band gap (> 3 eV) can absorb light in the UV range only, while those with a narrow band gap (< 3 eV) can be activated by visible light. Current trend in photo(electro)catalysis is to develop efficient semiconductors which can be activated by absorbing natural sunlight. During the years, various approaches have been developed to modify optical properties of semiconductors thus to be capable to absorb sunlight, for example: the incorporation of transition metal ions or defects into the crystal structure, the particles’ surface sensitization, hydrogenation, coupling of semiconductors with different band gap energies, etc.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - Sunlight-driven Photocatalytic and Photo-electrochemical Activity of ZnO/SnO2 Composite
SP  - 151
EP  - 153
UR  - https://hdl.handle.net/21.15107/rcub_dais_3631
ER  - 

@conference{
author = "Marković, Smilja and Stojković Simatović, Ivana and Stanković, Ana and Škapin, Srečo Davor and Mančić, Lidija and Mentus, Slavko and Uskoković, Dragan",
year = "2018",
abstract = "Due to their high photoactivity, photostability, chemical inertness, simple syntheses procedures as well as low cost, semiconductor materials such as TiO2, ZnO, V2O5, and SnO2, are recognized as materials with a great potential for photoelectrochemical and photocatalytic applications. In particular, they can be used as photoanode in the process of photoelectrolysis of water, or to initiate decomposition of different organic or biological pollutants in water under light irradiation. Which wavelength of light will be absorbed depends on the semiconductor band gap; semiconductors with a wide band gap (> 3 eV) can absorb light in the UV range only, while those with a narrow band gap (< 3 eV) can be activated by visible light. Current trend in photo(electro)catalysis is to develop efficient semiconductors which can be activated by absorbing natural sunlight. During the years, various approaches have been developed to modify optical properties of semiconductors thus to be capable to absorb sunlight, for example: the incorporation of transition metal ions or defects into the crystal structure, the particles’ surface sensitization, hydrogenation, coupling of semiconductors with different band gap energies, etc.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "Sunlight-driven Photocatalytic and Photo-electrochemical Activity of ZnO/SnO2 Composite",
pages = "151-153",
url = "https://hdl.handle.net/21.15107/rcub_dais_3631"
}

Marković, S., Stojković Simatović, I., Stanković, A., Škapin, S. D., Mančić, L., Mentus, S.,& Uskoković, D.. (2018). Sunlight-driven Photocatalytic and Photo-electrochemical Activity of ZnO/SnO2 Composite. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 151-153.
https://hdl.handle.net/21.15107/rcub_dais_3631

Marković S, Stojković Simatović I, Stanković A, Škapin SD, Mančić L, Mentus S, Uskoković D. Sunlight-driven Photocatalytic and Photo-electrochemical Activity of ZnO/SnO2 Composite. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:151-153.
https://hdl.handle.net/21.15107/rcub_dais_3631 .

Marković, Smilja, Stojković Simatović, Ivana, Stanković, Ana, Škapin, Srečo Davor, Mančić, Lidija, Mentus, Slavko, Uskoković, Dragan, "Sunlight-driven Photocatalytic and Photo-electrochemical Activity of ZnO/SnO2 Composite" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):151-153,
https://hdl.handle.net/21.15107/rcub_dais_3631 .

TY  - JOUR
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Dostanić, Jasmina
AU  - Veselinović, Ljiljana
AU  - Mančić, Lidija
AU  - Škapin, Srečo Davor
AU  - Dražić, Goran
AU  - Janković Častvan, Ivona
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/2346
AB  - Mechanical milling of commercial ZnO and SnO2 was used to produce a ZnO/SnO2 composite with a high density of surface defects; in particular, zinc interstitials (Zni) and oxygen vacancies (VO). To determine the impact of surface defects on photocatalytic activity, the relative concentration ratio of bulk defects to surface defects was modified by annealing at 400 and 700 °C. The possible application of the ZnO/SnO2 composite as a natural sunlight and UV-light driven photocatalyst was revealed via de-colorization of methylene blue. In both cases the ZnO/SnO2 composite exhibited enhanced photocatalytic activity as compared to the pristine ZnO. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), laser diffraction particle size analysis, Brunauer–Emmett–Teller, UV-Vis diffuse reflectance and photoluminescence spectroscopy. High-resolution transmission electron microscopy (HRTEM) and elemental mapping analyses were used to reveal the presence of SnO2 nanocrystallites on the surface of larger ZnO particles. The enhanced photocatalytic activity of the composite can be attributed to the synergetic effect of the surface defects and the ZnO/SnO2 heterojunction particles, which facilitated charge separation, thereby hindering the recombination of photogenerated carriers. This study draws attention to mechanical activation as an inexpensive and environmentally friendly technique for the large-scale production of the composite with an enhanced photocatalytic activity under illumination of either UV or sunlight.
PB  - Royal Society of Chemistry
T2  - RSC Advances
T1  - Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite
SP  - 42725
EP  - 42737
VL  - 7
DO  - 10.1039/C7RA06895F
UR  - https://hdl.handle.net/21.15107/rcub_dais_2346
ER  - 

@article{
author = "Marković, Smilja and Stanković, Ana and Dostanić, Jasmina and Veselinović, Ljiljana and Mančić, Lidija and Škapin, Srečo Davor and Dražić, Goran and Janković Častvan, Ivona and Uskoković, Dragan",
year = "2017",
abstract = "Mechanical milling of commercial ZnO and SnO2 was used to produce a ZnO/SnO2 composite with a high density of surface defects; in particular, zinc interstitials (Zni) and oxygen vacancies (VO). To determine the impact of surface defects on photocatalytic activity, the relative concentration ratio of bulk defects to surface defects was modified by annealing at 400 and 700 °C. The possible application of the ZnO/SnO2 composite as a natural sunlight and UV-light driven photocatalyst was revealed via de-colorization of methylene blue. In both cases the ZnO/SnO2 composite exhibited enhanced photocatalytic activity as compared to the pristine ZnO. In order to investigate the origin of the enhancement, the pristine metal oxides and composites were characterized using a variety of techniques, including X-ray diffraction (XRD), Raman and Fourier transform infrared (FTIR) spectroscopy, field emission scanning electron microscopy (FESEM), laser diffraction particle size analysis, Brunauer–Emmett–Teller, UV-Vis diffuse reflectance and photoluminescence spectroscopy. High-resolution transmission electron microscopy (HRTEM) and elemental mapping analyses were used to reveal the presence of SnO2 nanocrystallites on the surface of larger ZnO particles. The enhanced photocatalytic activity of the composite can be attributed to the synergetic effect of the surface defects and the ZnO/SnO2 heterojunction particles, which facilitated charge separation, thereby hindering the recombination of photogenerated carriers. This study draws attention to mechanical activation as an inexpensive and environmentally friendly technique for the large-scale production of the composite with an enhanced photocatalytic activity under illumination of either UV or sunlight.",
publisher = "Royal Society of Chemistry",
journal = "RSC Advances",
title = "Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite",
pages = "42725-42737",
volume = "7",
doi = "10.1039/C7RA06895F",
url = "https://hdl.handle.net/21.15107/rcub_dais_2346"
}

Marković, S., Stanković, A., Dostanić, J., Veselinović, L., Mančić, L., Škapin, S. D., Dražić, G., Janković Častvan, I.,& Uskoković, D.. (2017). Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite. in RSC Advances
Royal Society of Chemistry., 7, 42725-42737.
https://doi.org/10.1039/C7RA06895F
https://hdl.handle.net/21.15107/rcub_dais_2346

Marković S, Stanković A, Dostanić J, Veselinović L, Mančić L, Škapin SD, Dražić G, Janković Častvan I, Uskoković D. Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite. in RSC Advances. 2017;7:42725-42737.
doi:10.1039/C7RA06895F
https://hdl.handle.net/21.15107/rcub_dais_2346 .

Marković, Smilja, Stanković, Ana, Dostanić, Jasmina, Veselinović, Ljiljana, Mančić, Lidija, Škapin, Srečo Davor, Dražić, Goran, Janković Častvan, Ivona, Uskoković, Dragan, "Simultaneous enhancement of natural sunlight- and artificial UV-driven photocatalytic activity of a mechanically activated ZnO/SnO2 composite" in RSC Advances, 7 (2017):42725-42737,
https://doi.org/10.1039/C7RA06895F .,
https://hdl.handle.net/21.15107/rcub_dais_2346 .

TY  - CONF
AU  - Marković, Smilja
AU  - Stanković, Ana
AU  - Dostanić, Jasmina
AU  - Mančić, Lidija
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://dais.sanu.ac.rs/123456789/15440
AB  - Over the past four decades there is an increasing interest to develop highly efficient semiconductor photocatalysts for degradation of organic and biological pollutants in water under light irradiation. The semiconductor band gap determines which wavelength of light will be absorbed; precisely, semiconductors with a wide band gap (> 3 eV) can absorb only UV light, while those with a narrow band gap (< 3 eV) can be activated by visible light.
In this study we examined structural, morphological, textural and optical properties of ZnO/SnO2 composite as potential photocatalyst. Mechanical activation of commercial ZnO and SnO2 powders has been used to produce a composite with high density of surface defects. To investigate the influence of thermal treatment on the physical properties, and consequently on photoactivity, the composite has been traditionally annealed at 400 and 700 °C. The phase purity, crystal structure and average crystallite size of pristine metal oxides and the composites were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology and size distributions were studied by FE–SEM and laser diffraction particle size analyzer, respectively. The textural properties were determined from N¬2¬ adsorption/desorption experiments, while the optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. Photocatalytic activity of pristine ZnO and ZnO/SnO2 composites were examined via de-colorization of methylene blue under: (1) direct natural sunlight, and (2) artificial UV irradiation. In both cases enhanced photocatalytic activity of ZnO/SnO2 has been found. Enhanced photocatalytic activity can be attributed to the surface defects and to created ZnO/SnO2 heterojunctions which reduced electron-hole recombination time.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Enhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 composite
SP  - 49
EP  - 49
UR  - https://hdl.handle.net/21.15107/rcub_dais_15440
ER  - 

@conference{
author = "Marković, Smilja and Stanković, Ana and Dostanić, Jasmina and Mančić, Lidija and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2017",
abstract = "Over the past four decades there is an increasing interest to develop highly efficient semiconductor photocatalysts for degradation of organic and biological pollutants in water under light irradiation. The semiconductor band gap determines which wavelength of light will be absorbed; precisely, semiconductors with a wide band gap (> 3 eV) can absorb only UV light, while those with a narrow band gap (< 3 eV) can be activated by visible light.
In this study we examined structural, morphological, textural and optical properties of ZnO/SnO2 composite as potential photocatalyst. Mechanical activation of commercial ZnO and SnO2 powders has been used to produce a composite with high density of surface defects. To investigate the influence of thermal treatment on the physical properties, and consequently on photoactivity, the composite has been traditionally annealed at 400 and 700 °C. The phase purity, crystal structure and average crystallite size of pristine metal oxides and the composites were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology and size distributions were studied by FE–SEM and laser diffraction particle size analyzer, respectively. The textural properties were determined from N¬2¬ adsorption/desorption experiments, while the optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. Photocatalytic activity of pristine ZnO and ZnO/SnO2 composites were examined via de-colorization of methylene blue under: (1) direct natural sunlight, and (2) artificial UV irradiation. In both cases enhanced photocatalytic activity of ZnO/SnO2 has been found. Enhanced photocatalytic activity can be attributed to the surface defects and to created ZnO/SnO2 heterojunctions which reduced electron-hole recombination time.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Enhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 composite",
pages = "49-49",
url = "https://hdl.handle.net/21.15107/rcub_dais_15440"
}

Marković, S., Stanković, A., Dostanić, J., Mančić, L., Škapin, S. D.,& Uskoković, D.. (2017). Enhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 composite. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 49-49.
https://hdl.handle.net/21.15107/rcub_dais_15440

Marković S, Stanković A, Dostanić J, Mančić L, Škapin SD, Uskoković D. Enhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 composite. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:49-49.
https://hdl.handle.net/21.15107/rcub_dais_15440 .

Marković, Smilja, Stanković, Ana, Dostanić, Jasmina, Mančić, Lidija, Škapin, Srečo Davor, Uskoković, Dragan, "Enhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 composite" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):49-49,
https://hdl.handle.net/21.15107/rcub_dais_15440 .

TY  - JOUR
AU  - Stanković, Ana
AU  - Sezen, Meltem
AU  - Milenković, Marina
AU  - Kaišarević, Sonja
AU  - Andrić, Nebojša
AU  - Stevanović, Magdalena
PY  - 2016
UR  - https://dais.sanu.ac.rs/123456789/901
AB  - Copolymer poly (DL-lactide-co-glycolide) (PLGA) is extensively investigated for various biomedical applications such as controlled drug delivery or carriers in the tissue engineering. In addition, zinc oxide (ZnO) is widely used in biomedicine especially for materials like dental composites, as a constituent of creams for the treatment of a variety of skin irritations, to enhance the antibacterial activity of different medicaments and so on. Uniform, spherical ZnO nanoparticles (nano-ZnO) have been synthesized via microwave synthesis method. In addition to obtaining nano-ZnO, a further aim was to examine their immobilization in the PLGA polymer matrix (PLGA/nano-ZnO) and this was done by a simple physicochemical solvent/nonsolvent method. The samples were characterized by X-ray diffraction, scanning electron microscopy, laser diffraction particle size analyzer, differential thermal analysis, and thermal gravimetric analysis. The synthesized PLGA/nano-ZnO particles are spherical, uniform, and with diameters below 1 µm. The influence of the different solvents and the drying methods during the synthesis was investigated too. The biocompatibility of the samples is discussed in terms of in vitro toxicity on human hepatoma HepG2 cells by application of MTT assay and the antimicrobial activity was evaluated by broth microdilution method against different groups of microorganisms (Gram-positive bacteria, Gram-negative bacteria, and yeast Candida albicans).
PB  - Hindawi
T2  - Journal of Nanomaterials
T1  - PLGA/Nano-ZnO Composite Particles for Use in Biomedical Applications: Preparation, Characterization, and Antimicrobial Activity
SP  - 9425289
VL  - 2016
DO  - 10.1155/2016/9425289
UR  - https://hdl.handle.net/21.15107/rcub_dais_901
ER  - 

@article{
author = "Stanković, Ana and Sezen, Meltem and Milenković, Marina and Kaišarević, Sonja and Andrić, Nebojša and Stevanović, Magdalena",
year = "2016",
abstract = "Copolymer poly (DL-lactide-co-glycolide) (PLGA) is extensively investigated for various biomedical applications such as controlled drug delivery or carriers in the tissue engineering. In addition, zinc oxide (ZnO) is widely used in biomedicine especially for materials like dental composites, as a constituent of creams for the treatment of a variety of skin irritations, to enhance the antibacterial activity of different medicaments and so on. Uniform, spherical ZnO nanoparticles (nano-ZnO) have been synthesized via microwave synthesis method. In addition to obtaining nano-ZnO, a further aim was to examine their immobilization in the PLGA polymer matrix (PLGA/nano-ZnO) and this was done by a simple physicochemical solvent/nonsolvent method. The samples were characterized by X-ray diffraction, scanning electron microscopy, laser diffraction particle size analyzer, differential thermal analysis, and thermal gravimetric analysis. The synthesized PLGA/nano-ZnO particles are spherical, uniform, and with diameters below 1 µm. The influence of the different solvents and the drying methods during the synthesis was investigated too. The biocompatibility of the samples is discussed in terms of in vitro toxicity on human hepatoma HepG2 cells by application of MTT assay and the antimicrobial activity was evaluated by broth microdilution method against different groups of microorganisms (Gram-positive bacteria, Gram-negative bacteria, and yeast Candida albicans).",
publisher = "Hindawi",
journal = "Journal of Nanomaterials",
title = "PLGA/Nano-ZnO Composite Particles for Use in Biomedical Applications: Preparation, Characterization, and Antimicrobial Activity",
pages = "9425289",
volume = "2016",
doi = "10.1155/2016/9425289",
url = "https://hdl.handle.net/21.15107/rcub_dais_901"
}

Stanković, A., Sezen, M., Milenković, M., Kaišarević, S., Andrić, N.,& Stevanović, M.. (2016). PLGA/Nano-ZnO Composite Particles for Use in Biomedical Applications: Preparation, Characterization, and Antimicrobial Activity. in Journal of Nanomaterials
Hindawi., 2016, 9425289.
https://doi.org/10.1155/2016/9425289
https://hdl.handle.net/21.15107/rcub_dais_901

Stanković A, Sezen M, Milenković M, Kaišarević S, Andrić N, Stevanović M. PLGA/Nano-ZnO Composite Particles for Use in Biomedical Applications: Preparation, Characterization, and Antimicrobial Activity. in Journal of Nanomaterials. 2016;2016:9425289.
doi:10.1155/2016/9425289
https://hdl.handle.net/21.15107/rcub_dais_901 .

Stanković, Ana, Sezen, Meltem, Milenković, Marina, Kaišarević, Sonja, Andrić, Nebojša, Stevanović, Magdalena, "PLGA/Nano-ZnO Composite Particles for Use in Biomedical Applications: Preparation, Characterization, and Antimicrobial Activity" in Journal of Nanomaterials, 2016 (2016):9425289,
https://doi.org/10.1155/2016/9425289 .,
https://hdl.handle.net/21.15107/rcub_dais_901 .

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 .