TY  - CONF
AU  - Stamenković, Tijana
AU  - Čebela, Maria
AU  - Rosić, Milena
AU  - Lojpur, Vesna
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13159
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
T1  - Photocatalytic application of SrGd2O4 nanoparticles doped with rare earth
SP  - 63
EP  - 63
ER  - 

@conference{
author = "Stamenković, Tijana and Čebela, Maria and Rosić, Milena and Lojpur, Vesna",
year = "2024",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts",
title = "Photocatalytic application of SrGd2O4 nanoparticles doped with rare earth",
pages = "63-63"
}

Stamenković, T., Čebela, M., Rosić, M.,& Lojpur, V.. (2024). Photocatalytic application of SrGd2O4 nanoparticles doped with rare earth. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 63-63.

Stamenković T, Čebela M, Rosić M, Lojpur V. Photocatalytic application of SrGd2O4 nanoparticles doped with rare earth. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts. 2024;:63-63..

Stamenković, Tijana, Čebela, Maria, Rosić, Milena, Lojpur, Vesna, "Photocatalytic application of SrGd2O4 nanoparticles doped with rare earth" in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts (2024):63-63.

TY  - CONF
AU  - Rosić, Milena
AU  - Milošević, Maja
AU  - Dodevski, Vladimir
AU  - Jordanov, Dragana
AU  - Lojpur, Vesna
AU  - Vlašković, Tijana
AU  - Čebela, Maria
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13160
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
T1  - Spectroscopicand Morphological Properties of Co0.9Ho0.1MoO4 nanopowders
SP  - 64
EP  - 64
ER  - 

@conference{
author = "Rosić, Milena and Milošević, Maja and Dodevski, Vladimir and Jordanov, Dragana and Lojpur, Vesna and Vlašković, Tijana and Čebela, Maria",
year = "2024",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts",
title = "Spectroscopicand Morphological Properties of Co0.9Ho0.1MoO4 nanopowders",
pages = "64-64"
}

Rosić, M., Milošević, M., Dodevski, V., Jordanov, D., Lojpur, V., Vlašković, T.,& Čebela, M.. (2024). Spectroscopicand Morphological Properties of Co0.9Ho0.1MoO4 nanopowders. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 64-64.

Rosić M, Milošević M, Dodevski V, Jordanov D, Lojpur V, Vlašković T, Čebela M. Spectroscopicand Morphological Properties of Co0.9Ho0.1MoO4 nanopowders. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts. 2024;:64-64..

Rosić, Milena, Milošević, Maja, Dodevski, Vladimir, Jordanov, Dragana, Lojpur, Vesna, Vlašković, Tijana, Čebela, Maria, "Spectroscopicand Morphological Properties of Co0.9Ho0.1MoO4 nanopowders" in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts (2024):64-64.

TY  - CONF
AU  - Čebela, Maria
AU  - Tomić, Nataša
AU  - Vujković, Milica
AU  - Rosić, Milena
AU  - Lojpur, Vesna
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13155
PB  - Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade
PB  - Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)
C3  - IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
T1  - Two different paths to obtain pure nanosized Fe3O4: Morphology and Magnetic properties
SP  - 58
EP  - 58
ER  - 

@conference{
author = "Čebela, Maria and Tomić, Nataša and Vujković, Milica and Rosić, Milena and Lojpur, Vesna",
year = "2024",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade, Belgrade : Serbian Society for Innovative Materials in Extreme Conditions (SIM-EXTREME)",
journal = "IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts",
title = "Two different paths to obtain pure nanosized Fe3O4: Morphology and Magnetic properties",
pages = "58-58"
}

Čebela, M., Tomić, N., Vujković, M., Rosić, M.,& Lojpur, V.. (2024). Two different paths to obtain pure nanosized Fe3O4: Morphology and Magnetic properties. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 58-58.

Čebela M, Tomić N, Vujković M, Rosić M, Lojpur V. Two different paths to obtain pure nanosized Fe3O4: Morphology and Magnetic properties. in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts. 2024;:58-58..

Čebela, Maria, Tomić, Nataša, Vujković, Milica, Rosić, Milena, Lojpur, Vesna, "Two different paths to obtain pure nanosized Fe3O4: Morphology and Magnetic properties" in IMEC2024 - 2nd International Conference on Innovative Materials in Extreme Conditions : Book of abstracts (2024):58-58.

TY  - CONF
AU  - Stamenković, Tijana
AU  - Ranđelović, Marjan
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13173
AB  - In this study, we present the synthesis of a novel multifunctional materials, with particular accent on their photoluminescent and photocatalytic abbilities. SrGd2O4 powders co-doped with rare earth ions (Yb3+/Er3+, Yb3+/Ho3+ and Yb3+/Tm3+) with different mutual ratios are prepared via combustion route. X-ray Powder Diffraction patterns proved that all samples crystallize as a pure orthorhombic phase. Luminescence properties were measured and characteristic emission lines were revealed for each dopant system: red emission at 661 nm and two green emissions at 551 and 523 nm for Yb3+/Er3+ samples; green emission at 550 nm, red emission at 671 nm and infrared emission at 758 nm for Yb3+/Ho3+ samples; two blue emission bands at 450 nm and 474 nm, and red emission band at 650 nm for Yb3+/Tm3+ co-doped samples. UV-VIS Diffuse Reflectance Spectroscopy was performed in order to examine materials bandgap. Value of 4.3 eV was obtained for each sample, as well as the additional values from the bands at lower energies, which indicate potentially good photocatalytic properties. UV-VIS Absorption Spectroscopy was used to measure changes of the methylene blue concentration during the photocatalytic degradation process. After 4 h of exposure to the simulating Sun irradiation, more than 60% of the initial dye concentration was decomposed. Reaction parameters (MB concentration and catalyst mass) were altered in order to achieve the best photocatalytic performances of this newly synthesized materials.
PB  - Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club
C3  - 9th Conference of Young Chemists of Serbia : Book of abstracts
T1  - Multifunctional up-converting nanophosphorus: photoluminescent and photocatalytic properties
SP  - 159
EP  - 159
ER  - 

@conference{
author = "Stamenković, Tijana and Ranđelović, Marjan and Lojpur, Vesna",
year = "2023",
abstract = "In this study, we present the synthesis of a novel multifunctional materials, with particular accent on their photoluminescent and photocatalytic abbilities. SrGd2O4 powders co-doped with rare earth ions (Yb3+/Er3+, Yb3+/Ho3+ and Yb3+/Tm3+) with different mutual ratios are prepared via combustion route. X-ray Powder Diffraction patterns proved that all samples crystallize as a pure orthorhombic phase. Luminescence properties were measured and characteristic emission lines were revealed for each dopant system: red emission at 661 nm and two green emissions at 551 and 523 nm for Yb3+/Er3+ samples; green emission at 550 nm, red emission at 671 nm and infrared emission at 758 nm for Yb3+/Ho3+ samples; two blue emission bands at 450 nm and 474 nm, and red emission band at 650 nm for Yb3+/Tm3+ co-doped samples. UV-VIS Diffuse Reflectance Spectroscopy was performed in order to examine materials bandgap. Value of 4.3 eV was obtained for each sample, as well as the additional values from the bands at lower energies, which indicate potentially good photocatalytic properties. UV-VIS Absorption Spectroscopy was used to measure changes of the methylene blue concentration during the photocatalytic degradation process. After 4 h of exposure to the simulating Sun irradiation, more than 60% of the initial dye concentration was decomposed. Reaction parameters (MB concentration and catalyst mass) were altered in order to achieve the best photocatalytic performances of this newly synthesized materials.",
publisher = "Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club",
journal = "9th Conference of Young Chemists of Serbia : Book of abstracts",
title = "Multifunctional up-converting nanophosphorus: photoluminescent and photocatalytic properties",
pages = "159-159"
}

Stamenković, T., Ranđelović, M.,& Lojpur, V.. (2023). Multifunctional up-converting nanophosphorus: photoluminescent and photocatalytic properties. in 9th Conference of Young Chemists of Serbia : Book of abstracts
Belgrade : Serbian Chemical Society and Serbian Young Chemists' Club., 159-159.

Stamenković T, Ranđelović M, Lojpur V. Multifunctional up-converting nanophosphorus: photoluminescent and photocatalytic properties. in 9th Conference of Young Chemists of Serbia : Book of abstracts. 2023;:159-159..

Stamenković, Tijana, Ranđelović, Marjan, Lojpur, Vesna, "Multifunctional up-converting nanophosphorus: photoluminescent and photocatalytic properties" in 9th Conference of Young Chemists of Serbia : Book of abstracts (2023):159-159.

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Prekajski-Đorđević, Marija D.
AU  - Rabasović, Mihailo
AU  - Dinić, Ivana
AU  - Tomić, Miloš
AU  - Lojpur, Vesna
AU  - Mančić, Lidija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10499
AB  - Nanopowders of up-conversion SrGd2O4 orthorhombic (Pnma) phase co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er3+ (0.5 at%) ions were successfully prepared via sol-gel assisted combustion. Rietveld refinement indicated unit cell lattice parameters increase with Yb3+ and Er3+ ions doping. Scanning transmission electron microscopy with corresponding energy-dispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the up-conversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm (2H11/2, 4S3/2 → 4I15/2) as well as a red emission at 661 nm (4F9/2 → 4I15/2). The highest value of absolute quantum yield of 0.055% is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc = 976 nm, power density 200 W/cm2).
T2  - Journal of Luminescence
T1  - Quantum yield and energy transfer in up-conversion SrGd2O4:Yb, Er nanoparticles obtained via sol-gel assisted combustion
VL  - 253
SP  - 119491
DO  - 10.1016/j.jlumin.2022.119491
ER  - 

@article{
author = "Stamenković, Tijana and Radmilović, Nadežda and Prekajski-Đorđević, Marija D. and Rabasović, Mihailo and Dinić, Ivana and Tomić, Miloš and Lojpur, Vesna and Mančić, Lidija",
year = "2023",
abstract = "Nanopowders of up-conversion SrGd2O4 orthorhombic (Pnma) phase co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er3+ (0.5 at%) ions were successfully prepared via sol-gel assisted combustion. Rietveld refinement indicated unit cell lattice parameters increase with Yb3+ and Er3+ ions doping. Scanning transmission electron microscopy with corresponding energy-dispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the up-conversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm (2H11/2, 4S3/2 → 4I15/2) as well as a red emission at 661 nm (4F9/2 → 4I15/2). The highest value of absolute quantum yield of 0.055% is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc = 976 nm, power density 200 W/cm2).",
journal = "Journal of Luminescence",
title = "Quantum yield and energy transfer in up-conversion SrGd2O4:Yb, Er nanoparticles obtained via sol-gel assisted combustion",
volume = "253",
pages = "119491",
doi = "10.1016/j.jlumin.2022.119491"
}

Stamenković, T., Radmilović, N., Prekajski-Đorđević, M. D., Rabasović, M., Dinić, I., Tomić, M., Lojpur, V.,& Mančić, L.. (2023). Quantum yield and energy transfer in up-conversion SrGd2O4:Yb, Er nanoparticles obtained via sol-gel assisted combustion. in Journal of Luminescence, 253, 119491.
https://doi.org/10.1016/j.jlumin.2022.119491

Stamenković T, Radmilović N, Prekajski-Đorđević MD, Rabasović M, Dinić I, Tomić M, Lojpur V, Mančić L. Quantum yield and energy transfer in up-conversion SrGd2O4:Yb, Er nanoparticles obtained via sol-gel assisted combustion. in Journal of Luminescence. 2023;253:119491.
doi:10.1016/j.jlumin.2022.119491 .

Stamenković, Tijana, Radmilović, Nadežda, Prekajski-Đorđević, Marija D., Rabasović, Mihailo, Dinić, Ivana, Tomić, Miloš, Lojpur, Vesna, Mančić, Lidija, "Quantum yield and energy transfer in up-conversion SrGd2O4:Yb, Er nanoparticles obtained via sol-gel assisted combustion" in Journal of Luminescence, 253 (2023):119491,
https://doi.org/10.1016/j.jlumin.2022.119491 . .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Pjević, Dejan J.
AU  - Krstić, Jugoslav
AU  - Popović, Maja
AU  - Rajić, Vladimir
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10684
AB  - A set of samples of SrGd2O4 doped with Sm3+ and Dy3+with different concentrations was prepared via glycine-assisted combustion synthesis. All of the diffraction peaks are related to the pure orthorhombic lattice SrGd2O4, according to X-ray Powder Diffraction investigation. The Energy Dispersive X-ray Spectroscopy chemical characterization revealed that the structure included all desired elements. Field Emission Scanning Electron Microscopy was used to capture the morphology, which showed porous aggregated particles consisting of roughly 50 nm-sized spherical particles. The Mercury Intrusion Porosimetry was used to establish where voids originated, and the results showed that samples have a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy verified the successful incorporation of Dy3+ and Sm3+ ions in the matrix. Down-conversion luminescence spectra were recorded and typical emission transitions were found for either Sm3+ (4G5/2→6H5/2, 4G5/2→6H7/2, 4G5/2→6H9/2) or Dy3+ (4F9/2→6H15/2 and 4F9/2→6H13/2) ions. Calculation of the energy band gap using UV-VIS Diffuse Reflectance Spectroscopy yielded values of 4.3 eV for both doped samples. Using UV-VIS Absorption Spectroscopy, the photocatalytic degradation process was observed. After 4 h of simulating Sun exposure, an analysis of the photocatalytic properties revealed that approximately 50% of the Rhodamine B had been mineralized.
T2  - Surfaces and Interfaces
T1  - Characterization and photocatalytic application of SrGd2O4 doped with rare earth Sm3+ and Dy3+ ions
VL  - 37
SP  - 102755
DO  - 10.1016/j.surfin.2023.102755
ER  - 

@article{
author = "Stamenković, Tijana and Pjević, Dejan J. and Krstić, Jugoslav and Popović, Maja and Rajić, Vladimir and Lojpur, Vesna",
year = "2023",
abstract = "A set of samples of SrGd2O4 doped with Sm3+ and Dy3+with different concentrations was prepared via glycine-assisted combustion synthesis. All of the diffraction peaks are related to the pure orthorhombic lattice SrGd2O4, according to X-ray Powder Diffraction investigation. The Energy Dispersive X-ray Spectroscopy chemical characterization revealed that the structure included all desired elements. Field Emission Scanning Electron Microscopy was used to capture the morphology, which showed porous aggregated particles consisting of roughly 50 nm-sized spherical particles. The Mercury Intrusion Porosimetry was used to establish where voids originated, and the results showed that samples have a real permanent 3D pore structure. X-ray Photoelectron Spectroscopy verified the successful incorporation of Dy3+ and Sm3+ ions in the matrix. Down-conversion luminescence spectra were recorded and typical emission transitions were found for either Sm3+ (4G5/2→6H5/2, 4G5/2→6H7/2, 4G5/2→6H9/2) or Dy3+ (4F9/2→6H15/2 and 4F9/2→6H13/2) ions. Calculation of the energy band gap using UV-VIS Diffuse Reflectance Spectroscopy yielded values of 4.3 eV for both doped samples. Using UV-VIS Absorption Spectroscopy, the photocatalytic degradation process was observed. After 4 h of simulating Sun exposure, an analysis of the photocatalytic properties revealed that approximately 50% of the Rhodamine B had been mineralized.",
journal = "Surfaces and Interfaces",
title = "Characterization and photocatalytic application of SrGd2O4 doped with rare earth Sm3+ and Dy3+ ions",
volume = "37",
pages = "102755",
doi = "10.1016/j.surfin.2023.102755"
}

Stamenković, T., Pjević, D. J., Krstić, J., Popović, M., Rajić, V.,& Lojpur, V.. (2023). Characterization and photocatalytic application of SrGd2O4 doped with rare earth Sm3+ and Dy3+ ions. in Surfaces and Interfaces, 37, 102755.
https://doi.org/10.1016/j.surfin.2023.102755

Stamenković T, Pjević DJ, Krstić J, Popović M, Rajić V, Lojpur V. Characterization and photocatalytic application of SrGd2O4 doped with rare earth Sm3+ and Dy3+ ions. in Surfaces and Interfaces. 2023;37:102755.
doi:10.1016/j.surfin.2023.102755 .

Stamenković, Tijana, Pjević, Dejan J., Krstić, Jugoslav, Popović, Maja, Rajić, Vladimir, Lojpur, Vesna, "Characterization and photocatalytic application of SrGd2O4 doped with rare earth Sm3+ and Dy3+ ions" in Surfaces and Interfaces, 37 (2023):102755,
https://doi.org/10.1016/j.surfin.2023.102755 . .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Dinić, Ivana
AU  - Vuković, Marina
AU  - Barudžija, Tanja
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11483
AB  - In this investigation, samples of SrGd2O4 doped with different Yb3+ (2, 4, 6 at.%) ions and constant Ho3+ (1 at.%) and Bi3+ (2 at.%) concentrations were prepared. The sol-gel method with glycine as a fuel and citric acid as a chelator was chosen for sample preparation. All samples were heated in the furnace for 1.5 h at 500 °C and then thermally treated for 2.5 h at 1000 °C. The pure orthorhombic lattice of SrGd2O4, space group Pnma, was revealed by X-ray diffraction (XRD) (JCPDS Card No.:01-072-6387). Transmission electron microscopy (TEM) discovered agglomerated clusters of spherical particles measuring around 150 nm in size. Including Bi3+ ions into the structure influenced the morphology of the sample showing fine packing of pyramidal-shaped nanoparticles. The uniform distribution of constitutive elements in the samples was confirmed by energy dispersive spectroscopy (EDS). Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 976 nm. Dominant green (550 nm), red (671 nm), and infrared (758 nm) 5F4, 5S2 → 5I8, 5F5 → 5I8, 5F4, 5S2 → 5I7 transition emissions, respectively, are detected in all samples. The sample co-doped with Bi3+ showed the most intense photoluminescent emission.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles
SP  - 113
EP  - 114
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11483
ER  - 

@conference{
author = "Stamenković, Tijana and Radmilović, Nadežda and Dinić, Ivana and Vuković, Marina and Barudžija, Tanja and Čebela, Maria and Lojpur, Vesna",
year = "2023",
abstract = "In this investigation, samples of SrGd2O4 doped with different Yb3+ (2, 4, 6 at.%) ions and constant Ho3+ (1 at.%) and Bi3+ (2 at.%) concentrations were prepared. The sol-gel method with glycine as a fuel and citric acid as a chelator was chosen for sample preparation. All samples were heated in the furnace for 1.5 h at 500 °C and then thermally treated for 2.5 h at 1000 °C. The pure orthorhombic lattice of SrGd2O4, space group Pnma, was revealed by X-ray diffraction (XRD) (JCPDS Card No.:01-072-6387). Transmission electron microscopy (TEM) discovered agglomerated clusters of spherical particles measuring around 150 nm in size. Including Bi3+ ions into the structure influenced the morphology of the sample showing fine packing of pyramidal-shaped nanoparticles. The uniform distribution of constitutive elements in the samples was confirmed by energy dispersive spectroscopy (EDS). Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 976 nm. Dominant green (550 nm), red (671 nm), and infrared (758 nm) 5F4, 5S2 → 5I8, 5F5 → 5I8, 5F4, 5S2 → 5I7 transition emissions, respectively, are detected in all samples. The sample co-doped with Bi3+ showed the most intense photoluminescent emission.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles",
pages = "113-114",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11483"
}

Stamenković, T., Radmilović, N., Dinić, I., Vuković, M., Barudžija, T., Čebela, M.,& Lojpur, V.. (2023). Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 113-114.
https://hdl.handle.net/21.15107/rcub_vinar_11483

Stamenković T, Radmilović N, Dinić I, Vuković M, Barudžija T, Čebela M, Lojpur V. Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:113-114.
https://hdl.handle.net/21.15107/rcub_vinar_11483 .

Stamenković, Tijana, Radmilović, Nadežda, Dinić, Ivana, Vuković, Marina, Barudžija, Tanja, Čebela, Maria, Lojpur, Vesna, "Enhancement of up-conversion luminescent characteristics of Yb3+/Ho3+ co-doped Bi3+ based SrGd2O4 nanoparticles" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):113-114,
https://hdl.handle.net/21.15107/rcub_vinar_11483 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Ranđelović, Marjan
AU  - Čebela, Maria
AU  - Vuković, Marina
AU  - Dinić, Ivana
AU  - Mančić, Lidija
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11484
AB  - The aim of this research was to investigate for the first-time photocatalytic degradation of methylene blue over SrGd2O4 powders co-doped with constant Er3+ (0.5 at.%) and different Yb3+ (1, 2.5 and 5 at.%) concentrations. Samples were successfully prepared via sol-gel assisted combustion method. They exhibit photoluminescence properties which are manifested as red emission at 661 nm (4F9/2 → 4I15/2) and two green emissions at 551 and 523 nm (4S3/2 → 4I15/2 and 2H11/2 → 4I15/2). X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase. Scanning electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles. Energy dispersive X-ray spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. To calculate the energy band gap, UV-VIS diffuse reflectance spectroscopy was performed and a value of 4.3 eV was obtained, as well as the four additional values from the bands at lower energies. Photocatalytic degradation of methylene blue was monitored using UV-VIS absorption spectroscopy. Obtained results were promising since after 4 h of exposure to the simulating Sun irradiation, more than 50% of the starting dye concentration was mineralized.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus
SP  - 107
EP  - 107
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11484
ER  - 

@conference{
author = "Stamenković, Tijana and Ranđelović, Marjan and Čebela, Maria and Vuković, Marina and Dinić, Ivana and Mančić, Lidija and Lojpur, Vesna",
year = "2023",
abstract = "The aim of this research was to investigate for the first-time photocatalytic degradation of methylene blue over SrGd2O4 powders co-doped with constant Er3+ (0.5 at.%) and different Yb3+ (1, 2.5 and 5 at.%) concentrations. Samples were successfully prepared via sol-gel assisted combustion method. They exhibit photoluminescence properties which are manifested as red emission at 661 nm (4F9/2 → 4I15/2) and two green emissions at 551 and 523 nm (4S3/2 → 4I15/2 and 2H11/2 → 4I15/2). X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase. Scanning electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles. Energy dispersive X-ray spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. To calculate the energy band gap, UV-VIS diffuse reflectance spectroscopy was performed and a value of 4.3 eV was obtained, as well as the four additional values from the bands at lower energies. Photocatalytic degradation of methylene blue was monitored using UV-VIS absorption spectroscopy. Obtained results were promising since after 4 h of exposure to the simulating Sun irradiation, more than 50% of the starting dye concentration was mineralized.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus",
pages = "107-107",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11484"
}

Stamenković, T., Ranđelović, M., Čebela, M., Vuković, M., Dinić, I., Mančić, L.,& Lojpur, V.. (2023). Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 107-107.
https://hdl.handle.net/21.15107/rcub_vinar_11484

Stamenković T, Ranđelović M, Čebela M, Vuković M, Dinić I, Mančić L, Lojpur V. Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:107-107.
https://hdl.handle.net/21.15107/rcub_vinar_11484 .

Stamenković, Tijana, Ranđelović, Marjan, Čebela, Maria, Vuković, Marina, Dinić, Ivana, Mančić, Lidija, Lojpur, Vesna, "Characterization and photocatalytic activity of newly synthesized Er and Yb doped SrGd2O4 nanophosphorus" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):107-107,
https://hdl.handle.net/21.15107/rcub_vinar_11484 .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Dinić, Ivana
AU  - Vuković, Marina
AU  - Radmilović, Nadežda
AU  - Barudžija, Tanja
AU  - Tomić, Miloš
AU  - Mančić, Lidija
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11579
AB  - In this investigation, samples of strontium-gadolinium-oxide (SrGd2O4) doped with different Yb3+ (2, 4 and 6 at%) and constant Ho3+ (1 at%) contents and co-doped with Bi3+ (2 at%) were prepared using the glycine-assisted sol–gel method. The pure orthorhombic SrGd2O4 phase, space group Pnma, was revealed using X-ray diffraction in all samples. Transmission electron microscopy discovered agglomerated clusters of spherical particles measuring approximately 150 nm in size. The inclusion of Bi3+ ions into the structure influenced the morphology since the formation of larger grains was observed, with sizes reaching up to ∼1.7 μm. The uniform distribution of all constitutive elements was confirmed by energy-dispersive X-ray spectroscopy. In all samples, up-conversion emission spectra revealed two dominant green (540 and 550 nm), red (671 nm), and infrared (758 nm) emission lines, due to the 5F4,5S2→5I8, 5F5→5I8, and 5F4,5S2 → 5I7 transitions, respectively. The sample co-doped with Bi3+ showed the most intense photoluminescent emissions, shorter luminescence decay, and the highest quantum yield. Additionally, a significant decrease in the energy band gap value was detected using diffuse reflectance spectroscopy for this sample. Methylene blue was used as a test pollutant to investigate its photocatalytic efficiency under simulated sunlight irradiation. The results show that Bi3+ co-doping deteriorates the photocatalytic efficiency of the SrGd2O4:Yb3+/Ho3+ phase by reducing hydroxyl radical formation.
T2  - Ceramics International
T1  - Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase
DO  - 10.1016/j.ceramint.2023.09.103
ER  - 

@article{
author = "Stamenković, Tijana and Dinić, Ivana and Vuković, Marina and Radmilović, Nadežda and Barudžija, Tanja and Tomić, Miloš and Mančić, Lidija and Lojpur, Vesna",
year = "2023",
abstract = "In this investigation, samples of strontium-gadolinium-oxide (SrGd2O4) doped with different Yb3+ (2, 4 and 6 at%) and constant Ho3+ (1 at%) contents and co-doped with Bi3+ (2 at%) were prepared using the glycine-assisted sol–gel method. The pure orthorhombic SrGd2O4 phase, space group Pnma, was revealed using X-ray diffraction in all samples. Transmission electron microscopy discovered agglomerated clusters of spherical particles measuring approximately 150 nm in size. The inclusion of Bi3+ ions into the structure influenced the morphology since the formation of larger grains was observed, with sizes reaching up to ∼1.7 μm. The uniform distribution of all constitutive elements was confirmed by energy-dispersive X-ray spectroscopy. In all samples, up-conversion emission spectra revealed two dominant green (540 and 550 nm), red (671 nm), and infrared (758 nm) emission lines, due to the 5F4,5S2→5I8, 5F5→5I8, and 5F4,5S2 → 5I7 transitions, respectively. The sample co-doped with Bi3+ showed the most intense photoluminescent emissions, shorter luminescence decay, and the highest quantum yield. Additionally, a significant decrease in the energy band gap value was detected using diffuse reflectance spectroscopy for this sample. Methylene blue was used as a test pollutant to investigate its photocatalytic efficiency under simulated sunlight irradiation. The results show that Bi3+ co-doping deteriorates the photocatalytic efficiency of the SrGd2O4:Yb3+/Ho3+ phase by reducing hydroxyl radical formation.",
journal = "Ceramics International",
title = "Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase",
doi = "10.1016/j.ceramint.2023.09.103"
}

Stamenković, T., Dinić, I., Vuković, M., Radmilović, N., Barudžija, T., Tomić, M., Mančić, L.,& Lojpur, V.. (2023). Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase. in Ceramics International.
https://doi.org/10.1016/j.ceramint.2023.09.103

Stamenković T, Dinić I, Vuković M, Radmilović N, Barudžija T, Tomić M, Mančić L, Lojpur V. Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase. in Ceramics International. 2023;.
doi:10.1016/j.ceramint.2023.09.103 .

Stamenković, Tijana, Dinić, Ivana, Vuković, Marina, Radmilović, Nadežda, Barudžija, Tanja, Tomić, Miloš, Mančić, Lidija, Lojpur, Vesna, "Effect of Bi3+co-doping on the up-converting and photocatalytic properties of SrGd2O4:Yb3+/Ho3+ phase" in Ceramics International (2023),
https://doi.org/10.1016/j.ceramint.2023.09.103 . .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11644
AB  - Issues with air and water pollution have become a worldwide problem. Photocatalysis is a technique that holds promise for resolving these urgent issues due to its sustainability, affordability, and environmental friendliness. Recently, anti-Stokes and Stokes luminescence materials have been identified as potentially efficient candidates for photocatalysis exploitation. Under irradiation, doping different Ln3+ ions in an inorganic host will induce designable down and up-conversion emissions beginning in the UV and extending to the NIR region. This investigation will examine the photocatalytic application of the chosen samples. All samples were successfully prepared via sol-gel assisted combustion method. X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase of SrGd2O4. Scanning and transmission electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles favorable for photocatalytic application. Energy Dispersive X-ray Spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. Under simulated solar light irradiation, the photocatalytic characteristics of down-convertors were investigated in the photocatalytic degradation of organic dye methyl orange (MO). During the experiment, a UV/Vis spectrometer was utilized to measure a drop in MO concentration in water solutions. Aliquots of the working solutions were taken at precise time intervals, and the results show that the dye breakdown rate was successful after 4 hours. Methylene blue (MB), as a test pollutant, was used to investigate its photocatalytic efficiency under irradiation of simulated sunlight of up-conversion samples. The obtained results were encouraging because more than 50% of the starting dye concentration was mineralized after 4 hours of exposure to the simulated Sun irradiation.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
T1  - Photocatalytic activity of SrGd2O4 down and up-convertor systems
SP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11644
ER  - 

@conference{
author = "Stamenković, Tijana and Lojpur, Vesna",
year = "2023",
abstract = "Issues with air and water pollution have become a worldwide problem. Photocatalysis is a technique that holds promise for resolving these urgent issues due to its sustainability, affordability, and environmental friendliness. Recently, anti-Stokes and Stokes luminescence materials have been identified as potentially efficient candidates for photocatalysis exploitation. Under irradiation, doping different Ln3+ ions in an inorganic host will induce designable down and up-conversion emissions beginning in the UV and extending to the NIR region. This investigation will examine the photocatalytic application of the chosen samples. All samples were successfully prepared via sol-gel assisted combustion method. X-ray Powder Diffraction pattern proved that all samples crystallize as a pure orthorhombic phase of SrGd2O4. Scanning and transmission electron microscopy was used for morphology characterization and it revealed the existence of porous agglomerated round-shaped particles favorable for photocatalytic application. Energy Dispersive X-ray Spectroscopy showed the presence of dopant ions and even distribution of all constituting elements. Under simulated solar light irradiation, the photocatalytic characteristics of down-convertors were investigated in the photocatalytic degradation of organic dye methyl orange (MO). During the experiment, a UV/Vis spectrometer was utilized to measure a drop in MO concentration in water solutions. Aliquots of the working solutions were taken at precise time intervals, and the results show that the dye breakdown rate was successful after 4 hours. Methylene blue (MB), as a test pollutant, was used to investigate its photocatalytic efficiency under irradiation of simulated sunlight of up-conversion samples. The obtained results were encouraging because more than 50% of the starting dye concentration was mineralized after 4 hours of exposure to the simulated Sun irradiation.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade",
title = "Photocatalytic activity of SrGd2O4 down and up-convertor systems",
pages = "64",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11644"
}

Stamenković, T.,& Lojpur, V.. (2023). Photocatalytic activity of SrGd2O4 down and up-convertor systems. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 64.
https://hdl.handle.net/21.15107/rcub_vinar_11644

Stamenković T, Lojpur V. Photocatalytic activity of SrGd2O4 down and up-convertor systems. in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade. 2023;:64.
https://hdl.handle.net/21.15107/rcub_vinar_11644 .

Stamenković, Tijana, Lojpur, Vesna, "Photocatalytic activity of SrGd2O4 down and up-convertor systems" in Advanced Ceramics and Application :11th Serbian Ceramic Society Conference : program and the book of abstracts; September 18-20, 2023; Belgrade (2023):64,
https://hdl.handle.net/21.15107/rcub_vinar_11644 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Ranđelović, Marjan
AU  - Dinić, Ivana
AU  - Mančić, Lidija
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12318
AB  - In this work we present new up-conversion materials, consisted of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at%) ions and constant concentration of Tm3+ (1 at%), prepared by the combustion method. X-ray powder diffraction (XRPD) showed that assynthesized nanoparticles have orthorhombic structure (Pnma), assigned to the JCPDS Card No:01-072-6387. Scanning electron microscopy (SEM) revealed that obtained nanostructure is composed of porous agglomerated nanoparticles, while energy dispersive spectroscopy (EDS) confirmed presence and uniform distribution of all constituting elements accross the sample. Luminescent properties were evaluated and discovered two blue emission bands at 450 nm and 474 nm, and one red emission band at 650 nm. The sample co-doped with 4 at% Tm3+ showed the most intense photoluminescent emission, and because of that was used in the photocatalytic exiperiment. UV-VIS Diffuse Reflectance Spectroscopy was performed in order to examine materials bandgap, and value of 4.3 eV was obtained as well as the additional values from the bands at lower energies, which indicate potentially good photocatalytic properties. X-ray photoelectron spectroscopy (XPS) revealed presence of OHgroups on the surface which also have positive impact on the photocatalytic performances of the material. UV-VIS Absorption Spectroscopy was used to measure changes of the methylene blue concentration during the photocatalytic degradation process. After 4 h of exposure to the simulating Sun irradiation, the results indicate successful dye decomposition rate. Reaction parameters (MB concentration and catalyst mass) were altered in order to achieve the best photocatalytic performances of this newly synthesized materials.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Yb3+/Tm3+ doped SrGd2O4 as photoluminescent and photocatalytic material
SP  - 45
EP  - 45
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12318
ER  - 

@conference{
author = "Stamenković, Tijana and Ranđelović, Marjan and Dinić, Ivana and Mančić, Lidija and Lojpur, Vesna",
year = "2023",
abstract = "In this work we present new up-conversion materials, consisted of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at%) ions and constant concentration of Tm3+ (1 at%), prepared by the combustion method. X-ray powder diffraction (XRPD) showed that assynthesized nanoparticles have orthorhombic structure (Pnma), assigned to the JCPDS Card No:01-072-6387. Scanning electron microscopy (SEM) revealed that obtained nanostructure is composed of porous agglomerated nanoparticles, while energy dispersive spectroscopy (EDS) confirmed presence and uniform distribution of all constituting elements accross the sample. Luminescent properties were evaluated and discovered two blue emission bands at 450 nm and 474 nm, and one red emission band at 650 nm. The sample co-doped with 4 at% Tm3+ showed the most intense photoluminescent emission, and because of that was used in the photocatalytic exiperiment. UV-VIS Diffuse Reflectance Spectroscopy was performed in order to examine materials bandgap, and value of 4.3 eV was obtained as well as the additional values from the bands at lower energies, which indicate potentially good photocatalytic properties. X-ray photoelectron spectroscopy (XPS) revealed presence of OHgroups on the surface which also have positive impact on the photocatalytic performances of the material. UV-VIS Absorption Spectroscopy was used to measure changes of the methylene blue concentration during the photocatalytic degradation process. After 4 h of exposure to the simulating Sun irradiation, the results indicate successful dye decomposition rate. Reaction parameters (MB concentration and catalyst mass) were altered in order to achieve the best photocatalytic performances of this newly synthesized materials.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Yb3+/Tm3+ doped SrGd2O4 as photoluminescent and photocatalytic material",
pages = "45-45",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12318"
}

Stamenković, T., Ranđelović, M., Dinić, I., Mančić, L.,& Lojpur, V.. (2023). Yb3+/Tm3+ doped SrGd2O4 as photoluminescent and photocatalytic material. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 45-45.
https://hdl.handle.net/21.15107/rcub_vinar_12318

Stamenković T, Ranđelović M, Dinić I, Mančić L, Lojpur V. Yb3+/Tm3+ doped SrGd2O4 as photoluminescent and photocatalytic material. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:45-45.
https://hdl.handle.net/21.15107/rcub_vinar_12318 .

Stamenković, Tijana, Ranđelović, Marjan, Dinić, Ivana, Mančić, Lidija, Lojpur, Vesna, "Yb3+/Tm3+ doped SrGd2O4 as photoluminescent and photocatalytic material" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):45-45,
https://hdl.handle.net/21.15107/rcub_vinar_12318 .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Ranđelović, Marjan
AU  - Lojpur, Vesna
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12840
AB  - Cilj ovog istraživanja je da se po prvi put ispita fotokatalitička razgradnja metilen plavog na prahovima SrGd2O4 dopiranim istom koncentracijom Er3+ (0.5 at%) i različitim koncentracijama Yb3+ (1, 2.5 and 5 at%). Difrakcija rendgenskim zracima potvrdila je da uzorci kristališu u čistoj ortorombičnoj fazi. Skenirajuća elektronska mikroskopija je korišćena za ispitivanje morfologije i pokazala je da postojanje poroznih aglomerata sačinjenih od manjih čestica sferičnog oblika. Energetski disperzivna spektroskopija pokazala je prisustvo dopanata kao i uniformnu raspodelu svih elemenata u materijalu. Za izračunavanje energetskog procepa korišćena je metoda UV-VIS difuzione refleksione spektroskopije, kojom je dobijena vrednost od 4,3 eV, kao i još četri dodatne vrednosti na nižim energijama. Fotokatalitička razgradnja metilen plavog praćena je metodom UV-VIS apsorpcione spektroskopije. Dobijeni su zadovoljavajući rezultati jer je pri određenim reakcionim uslovima nakon eksperimenta u trajanju od 4 h pod dejstvom simulirane sunčeve svetlosti, potvrđena razgrađnja više od 50% od ukupne početne koncentracije boje.
T2  - Advanced Technologies
T1  - Investigation of the photocatalytic properties of Er3+ i Yb3+ doped strontium gadolinium oxide nanopowder
VL  - 12
IS  - 2
SP  - 5
EP  - 11
DO  - 10.5937/savteh2302004S
ER  - 

@article{
author = "Stamenković, Tijana and Ranđelović, Marjan and Lojpur, Vesna",
year = "2023",
abstract = "Cilj ovog istraživanja je da se po prvi put ispita fotokatalitička razgradnja metilen plavog na prahovima SrGd2O4 dopiranim istom koncentracijom Er3+ (0.5 at%) i različitim koncentracijama Yb3+ (1, 2.5 and 5 at%). Difrakcija rendgenskim zracima potvrdila je da uzorci kristališu u čistoj ortorombičnoj fazi. Skenirajuća elektronska mikroskopija je korišćena za ispitivanje morfologije i pokazala je da postojanje poroznih aglomerata sačinjenih od manjih čestica sferičnog oblika. Energetski disperzivna spektroskopija pokazala je prisustvo dopanata kao i uniformnu raspodelu svih elemenata u materijalu. Za izračunavanje energetskog procepa korišćena je metoda UV-VIS difuzione refleksione spektroskopije, kojom je dobijena vrednost od 4,3 eV, kao i još četri dodatne vrednosti na nižim energijama. Fotokatalitička razgradnja metilen plavog praćena je metodom UV-VIS apsorpcione spektroskopije. Dobijeni su zadovoljavajući rezultati jer je pri određenim reakcionim uslovima nakon eksperimenta u trajanju od 4 h pod dejstvom simulirane sunčeve svetlosti, potvrđena razgrađnja više od 50% od ukupne početne koncentracije boje.",
journal = "Advanced Technologies",
title = "Investigation of the photocatalytic properties of Er3+ i Yb3+ doped strontium gadolinium oxide nanopowder",
volume = "12",
number = "2",
pages = "5-11",
doi = "10.5937/savteh2302004S"
}

Stamenković, T., Ranđelović, M.,& Lojpur, V.. (2023). Investigation of the photocatalytic properties of Er3+ i Yb3+ doped strontium gadolinium oxide nanopowder. in Advanced Technologies, 12(2), 5-11.
https://doi.org/10.5937/savteh2302004S

Stamenković T, Ranđelović M, Lojpur V. Investigation of the photocatalytic properties of Er3+ i Yb3+ doped strontium gadolinium oxide nanopowder. in Advanced Technologies. 2023;12(2):5-11.
doi:10.5937/savteh2302004S .

Stamenković, Tijana, Ranđelović, Marjan, Lojpur, Vesna, "Investigation of the photocatalytic properties of Er3+ i Yb3+ doped strontium gadolinium oxide nanopowder" in Advanced Technologies, 12, no. 2 (2023):5-11,
https://doi.org/10.5937/savteh2302004S . .

TY  - CONF
AU  - Rosić, Milena
AU  - Milošević, Maja
AU  - Čebela, Maria
AU  - Dodevski, Vladimir
AU  - Lojpur, Vesna
AU  - Vasić, Marija
AU  - Zarubica, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11467
AB  - The nanostructured powderwas synthesized by the glycine nitrate procedure (GNP) because it proved to be the most effective and simplest method suitable for controlling the composition and morphology of Co0.9Ho0.1MoO4. To prepare nanostructured Co0.9Ho0.1MoO4, metal nitrates, and glycine were mixed in appropriate stoichiometric ratios. For the preparation of the technologically important Co0.9Ho0.1MoO4, the combustion process has proven to be a promising method that achieves control of stoichiometry, homogeneity, and purity. The synthesized samples were examined by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The acquired nanopowder showed a tendency for agglomeration, inhomogeneous microstructure, and plate-like crystals. The photocatalytic activity of the obtained Co0.9Ho0.1MoO4nanopowders was evaluated by the photocatalytic degradation of crystal violet in an aqueous solution. After photocatalytic testing and all the above-mentioned characterizations, it was shown that these nanostructured materials represent promising solutions in photocatalytic processes toward green chemistry and sustainable development.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application XI : Program and the Book of Abstracts ; September 18-20, 2023; Belgrade
T1  - Examination and characterization of nanostructured Co0.9Ho0.1MoO4
SP  - 69
EP  - 69
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11467
ER  - 

@conference{
author = "Rosić, Milena and Milošević, Maja and Čebela, Maria and Dodevski, Vladimir and Lojpur, Vesna and Vasić, Marija and Zarubica, Aleksandra",
year = "2023",
abstract = "The nanostructured powderwas synthesized by the glycine nitrate procedure (GNP) because it proved to be the most effective and simplest method suitable for controlling the composition and morphology of Co0.9Ho0.1MoO4. To prepare nanostructured Co0.9Ho0.1MoO4, metal nitrates, and glycine were mixed in appropriate stoichiometric ratios. For the preparation of the technologically important Co0.9Ho0.1MoO4, the combustion process has proven to be a promising method that achieves control of stoichiometry, homogeneity, and purity. The synthesized samples were examined by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The acquired nanopowder showed a tendency for agglomeration, inhomogeneous microstructure, and plate-like crystals. The photocatalytic activity of the obtained Co0.9Ho0.1MoO4nanopowders was evaluated by the photocatalytic degradation of crystal violet in an aqueous solution. After photocatalytic testing and all the above-mentioned characterizations, it was shown that these nanostructured materials represent promising solutions in photocatalytic processes toward green chemistry and sustainable development.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application XI : Program and the Book of Abstracts ; September 18-20, 2023; Belgrade",
title = "Examination and characterization of nanostructured Co0.9Ho0.1MoO4",
pages = "69-69",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11467"
}

Rosić, M., Milošević, M., Čebela, M., Dodevski, V., Lojpur, V., Vasić, M.,& Zarubica, A.. (2023). Examination and characterization of nanostructured Co0.9Ho0.1MoO4. in Advanced Ceramics and Application XI : Program and the Book of Abstracts ; September 18-20, 2023; Belgrade
Belgrade : Serbian Ceramic Society., 69-69.
https://hdl.handle.net/21.15107/rcub_vinar_11467

Rosić M, Milošević M, Čebela M, Dodevski V, Lojpur V, Vasić M, Zarubica A. Examination and characterization of nanostructured Co0.9Ho0.1MoO4. in Advanced Ceramics and Application XI : Program and the Book of Abstracts ; September 18-20, 2023; Belgrade. 2023;:69-69.
https://hdl.handle.net/21.15107/rcub_vinar_11467 .

Rosić, Milena, Milošević, Maja, Čebela, Maria, Dodevski, Vladimir, Lojpur, Vesna, Vasić, Marija, Zarubica, Aleksandra, "Examination and characterization of nanostructured Co0.9Ho0.1MoO4" in Advanced Ceramics and Application XI : Program and the Book of Abstracts ; September 18-20, 2023; Belgrade (2023):69-69,
https://hdl.handle.net/21.15107/rcub_vinar_11467 .

TY  - CONF
AU  - Rosić, Milena
AU  - Milošević, Maja
AU  - Čebela, Maria
AU  - Dodevski, Vladimir
AU  - Lojpur, Vesna
AU  - Ljupković, Radomir
AU  - Zarubica, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11490
AB  - Co0.9Ho0.1MoO4 nanopowders were obtained by applying glycine nitrate procedure (GNP). The synthesized samples were investigated by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The photocatalytic activity of acquired Co0.9Ho0.1MoO4 nanopowders was estimated by the photocatalytic degradation of crystal violet in aqueous solution. A simple and effective method for controlling the composition and morphology of Co0.9Ho0.1MoO4 is presented in this paper, as well as a potentially new approach in the methodology of inorganic synthesis. During photocatalytic testing nanostructured material Co0.9Ho0.1MoO4 indicated the possibility of a promising solution in photocatalytic processes towards green chemistry and sustainable development.
PB  - Belgrade : University of Belgrade, Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
T1  - Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders
SP  - 81
EP  - 81
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11490
ER  - 

@conference{
author = "Rosić, Milena and Milošević, Maja and Čebela, Maria and Dodevski, Vladimir and Lojpur, Vesna and Ljupković, Radomir and Zarubica, Aleksandra",
year = "2023",
abstract = "Co0.9Ho0.1MoO4 nanopowders were obtained by applying glycine nitrate procedure (GNP). The synthesized samples were investigated by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The photocatalytic activity of acquired Co0.9Ho0.1MoO4 nanopowders was estimated by the photocatalytic degradation of crystal violet in aqueous solution. A simple and effective method for controlling the composition and morphology of Co0.9Ho0.1MoO4 is presented in this paper, as well as a potentially new approach in the methodology of inorganic synthesis. During photocatalytic testing nanostructured material Co0.9Ho0.1MoO4 indicated the possibility of a promising solution in photocatalytic processes towards green chemistry and sustainable development.",
publisher = "Belgrade : University of Belgrade, Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade",
title = "Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders",
pages = "81-81",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11490"
}

Rosić, M., Milošević, M., Čebela, M., Dodevski, V., Lojpur, V., Ljupković, R.,& Zarubica, A.. (2023). Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
Belgrade : University of Belgrade, Institute for Multidisciplinary Research., 81-81.
https://hdl.handle.net/21.15107/rcub_vinar_11490

Rosić M, Milošević M, Čebela M, Dodevski V, Lojpur V, Ljupković R, Zarubica A. Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade. 2023;:81-81.
https://hdl.handle.net/21.15107/rcub_vinar_11490 .

Rosić, Milena, Milošević, Maja, Čebela, Maria, Dodevski, Vladimir, Lojpur, Vesna, Ljupković, Radomir, Zarubica, Aleksandra, "Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade (2023):81-81,
https://hdl.handle.net/21.15107/rcub_vinar_11490 .

TY  - CONF
AU  - Rosić, Milena
AU  - Milošević, M.
AU  - Čebela, Maria
AU  - Dodevski, Vladimir
AU  - Lojpur, Vesna
AU  - Ljupković, Radomir
AU  - Zarubica, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11750
AB  - Nanometric size Co0.9Ho0.1MoO4 powder particles were obtained by applying glycine nitrate procedure (GNP). Powder properties have been studied by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The photocatalytic activity of acquiring Co0.9Ho0.1MoO4 nanopowders was estimated by the photocatalytic degradation of crystal violet in an aqueous solution. We present a simple and effective method for controlling the composition and morphology of Co0.9Ho0.1MoO4, as well as a possible new approach in inorganic synthesis methodology. During photocatalytic testing, the studied nanoparticle powder indicated a potentially promising solution in photocatalytic processes toward green chemistry and sustainable development.
PB  - Society of Chemists and Technologists of Macedonia
C3  - 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
T1  - Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure
SP  - 22
EP  - 22
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11750
ER  - 

@conference{
author = "Rosić, Milena and Milošević, M. and Čebela, Maria and Dodevski, Vladimir and Lojpur, Vesna and Ljupković, Radomir and Zarubica, Aleksandra",
year = "2023",
abstract = "Nanometric size Co0.9Ho0.1MoO4 powder particles were obtained by applying glycine nitrate procedure (GNP). Powder properties have been studied by DTA, X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Spectroscopy, Field emission scanning electron microscopy (FESEM), and nitrogen adsorption method. The photocatalytic activity of acquiring Co0.9Ho0.1MoO4 nanopowders was estimated by the photocatalytic degradation of crystal violet in an aqueous solution. We present a simple and effective method for controlling the composition and morphology of Co0.9Ho0.1MoO4, as well as a possible new approach in inorganic synthesis methodology. During photocatalytic testing, the studied nanoparticle powder indicated a potentially promising solution in photocatalytic processes toward green chemistry and sustainable development.",
publisher = "Society of Chemists and Technologists of Macedonia",
journal = "26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia",
title = "Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure",
pages = "22-22",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11750"
}

Rosić, M., Milošević, M., Čebela, M., Dodevski, V., Lojpur, V., Ljupković, R.,& Zarubica, A.. (2023). Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia
Society of Chemists and Technologists of Macedonia., 22-22.
https://hdl.handle.net/21.15107/rcub_vinar_11750

Rosić M, Milošević M, Čebela M, Dodevski V, Lojpur V, Ljupković R, Zarubica A. Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure. in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia. 2023;:22-22.
https://hdl.handle.net/21.15107/rcub_vinar_11750 .

Rosić, Milena, Milošević, M., Čebela, Maria, Dodevski, Vladimir, Lojpur, Vesna, Ljupković, Radomir, Zarubica, Aleksandra, "Investigation of Co0.9Ho0.1MoO4 Nanopowders Obtained by Glycine Nitrate Procedure" in 26th Congress of the Society of Chemists and Technologists of Macedonia : the book of abstracts; September 20-23, Ohrid, Macedonia (2023):22-22,
https://hdl.handle.net/21.15107/rcub_vinar_11750 .

TY  - CONF
AU  - Čebela, Maria
AU  - Čakar, Uroš
AU  - Lojpur, Vesna
AU  - Milošević, Maja
AU  - Krstić, Sanja
AU  - Dodevski, Vladimir
AU  - Rosić, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11468
AB  - We studied the influence of Ag doping on the crystal structure and magnetic properties of CuO nanopowders. For the synthesis of nanoparticles of copper-silver oxides solid solutions with the composition Cu1-xAgxO (x=0.01–0.05), a self- propagating synthesis was applied at room temperature, during which a successful reaction between metal nitrate and sodium hydroxide occurred. Prepared powders were calcinated at 700 °C for 2 h. The diffraction pattern was recorded at room temperature and atmospheric pressure without of any re-heating of the sample. The Rietveld method for fitting refinement procedure was performed which showed the incorporation of Ag3+ ions in the CuO crystal lattice, where they substitute Cu2+ ions. SQUID magnetometer was used for investigation of magnetic behavior of synthesized materials in temperature interval 2–400 K. It is known that copper(II) oxide exhibits ferroelectricity driven by magnetic order at temperature as high as 230 K [1]. Multiferroic phase is present above the first order phase transition at TN1 = 213 K and exists up to the subsequent first order phase transition TN2 = 230 K [1,2]. It was shown that disorder in the form of impurities can stabilize the ferroelectric phase [2] this was our motivation to dope CuO with Ag in order to improve further its multiferroic properties. Compared with CuO, we observed small changes in magnetic properties in Cu1-xAgxO. The size and morphology of the particles were successfully determined by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
T1  - Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders
SP  - 122
EP  - 122
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11468
ER  - 

@conference{
author = "Čebela, Maria and Čakar, Uroš and Lojpur, Vesna and Milošević, Maja and Krstić, Sanja and Dodevski, Vladimir and Rosić, Milena",
year = "2023",
abstract = "We studied the influence of Ag doping on the crystal structure and magnetic properties of CuO nanopowders. For the synthesis of nanoparticles of copper-silver oxides solid solutions with the composition Cu1-xAgxO (x=0.01–0.05), a self- propagating synthesis was applied at room temperature, during which a successful reaction between metal nitrate and sodium hydroxide occurred. Prepared powders were calcinated at 700 °C for 2 h. The diffraction pattern was recorded at room temperature and atmospheric pressure without of any re-heating of the sample. The Rietveld method for fitting refinement procedure was performed which showed the incorporation of Ag3+ ions in the CuO crystal lattice, where they substitute Cu2+ ions. SQUID magnetometer was used for investigation of magnetic behavior of synthesized materials in temperature interval 2–400 K. It is known that copper(II) oxide exhibits ferroelectricity driven by magnetic order at temperature as high as 230 K [1]. Multiferroic phase is present above the first order phase transition at TN1 = 213 K and exists up to the subsequent first order phase transition TN2 = 230 K [1,2]. It was shown that disorder in the form of impurities can stabilize the ferroelectric phase [2] this was our motivation to dope CuO with Ag in order to improve further its multiferroic properties. Compared with CuO, we observed small changes in magnetic properties in Cu1-xAgxO. The size and morphology of the particles were successfully determined by transmission electron microscopy (TEM) and scanning electron microscopy (SEM).",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade",
title = "Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders",
pages = "122-122",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11468"
}

Čebela, M., Čakar, U., Lojpur, V., Milošević, M., Krstić, S., Dodevski, V.,& Rosić, M.. (2023). Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade
Belgrade : Institute for Multidisciplinary Research., 122-122.
https://hdl.handle.net/21.15107/rcub_vinar_11468

Čebela M, Čakar U, Lojpur V, Milošević M, Krstić S, Dodevski V, Rosić M. Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade. 2023;:122-122.
https://hdl.handle.net/21.15107/rcub_vinar_11468 .

Čebela, Maria, Čakar, Uroš, Lojpur, Vesna, Milošević, Maja, Krstić, Sanja, Dodevski, Vladimir, Rosić, Milena, "Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade (2023):122-122,
https://hdl.handle.net/21.15107/rcub_vinar_11468 .

TY  - CONF
AU  - Čebela, Maria
AU  - Reddy, Priyanka
AU  - Čakar, Uroš
AU  - Labus, Nebojša
AU  - Lojpur, Vesna
AU  - Dodevski, Vladimir
AU  - Rosić, Milena
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11475
AB  - Iron(III) titanates are attracting rapidly growing interest as very promising candidates for applications in solar energy and optoelectronics because they contain earth-rich elements. Potentially, Fe2TiO5 is a thermoelectric material. We used a Vibrating Sample Magnetometer and Superconducting Quantum Interferometer Device Magnetometer to study the magnetic properties of the pseudobrookite material Fe2TiO5. The material was synthesized by the sol-gel method. The structural parameters of the synthesized samples were investigated by X-ray analysis. The diffractogram was refined with the help of Rietveld refinement on FullProf Suite. Temperature-dependent ZFC and FC magnetization was measured on SQUID for lower temperature down to 2 K and on VSM for higher temperatures up to 1000 K. A transition was observed at 815 K with a separation between the ZFC and FC curves. Parallelly the bifurcation in the isothermal hysteresis measurements indicates that the system exhibits dominant canted AFM (or weak FM) with a small amount of spin glass. The small value of the moment was also pointing towards the canted AFM ordering. The size and morphology of the particles was determined using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Synthesis, structure and magnetic properties of Fe2TiO5
SP  - 124
EP  - 124
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11475
ER  - 

@conference{
author = "Čebela, Maria and Reddy, Priyanka and Čakar, Uroš and Labus, Nebojša and Lojpur, Vesna and Dodevski, Vladimir and Rosić, Milena",
year = "2023",
abstract = "Iron(III) titanates are attracting rapidly growing interest as very promising candidates for applications in solar energy and optoelectronics because they contain earth-rich elements. Potentially, Fe2TiO5 is a thermoelectric material. We used a Vibrating Sample Magnetometer and Superconducting Quantum Interferometer Device Magnetometer to study the magnetic properties of the pseudobrookite material Fe2TiO5. The material was synthesized by the sol-gel method. The structural parameters of the synthesized samples were investigated by X-ray analysis. The diffractogram was refined with the help of Rietveld refinement on FullProf Suite. Temperature-dependent ZFC and FC magnetization was measured on SQUID for lower temperature down to 2 K and on VSM for higher temperatures up to 1000 K. A transition was observed at 815 K with a separation between the ZFC and FC curves. Parallelly the bifurcation in the isothermal hysteresis measurements indicates that the system exhibits dominant canted AFM (or weak FM) with a small amount of spin glass. The small value of the moment was also pointing towards the canted AFM ordering. The size and morphology of the particles was determined using transmission electron microscopy (TEM) and scanning electron microscopy (SEM).",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Synthesis, structure and magnetic properties of Fe2TiO5",
pages = "124-124",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11475"
}

Čebela, M., Reddy, P., Čakar, U., Labus, N., Lojpur, V., Dodevski, V.,& Rosić, M.. (2023). Synthesis, structure and magnetic properties of Fe2TiO5. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 124-124.
https://hdl.handle.net/21.15107/rcub_vinar_11475

Čebela M, Reddy P, Čakar U, Labus N, Lojpur V, Dodevski V, Rosić M. Synthesis, structure and magnetic properties of Fe2TiO5. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:124-124.
https://hdl.handle.net/21.15107/rcub_vinar_11475 .

Čebela, Maria, Reddy, Priyanka, Čakar, Uroš, Labus, Nebojša, Lojpur, Vesna, Dodevski, Vladimir, Rosić, Milena, "Synthesis, structure and magnetic properties of Fe2TiO5" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):124-124,
https://hdl.handle.net/21.15107/rcub_vinar_11475 .

TY  - JOUR
AU  - Luković, Milentije
AU  - Spasojević-Savković, Milica
AU  - Kosić, Olivera
AU  - Barudžija, Tanja
AU  - Lojpur, Vesna
AU  - Maričić, Aleksa
AU  - Spasojević, Miroslav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12841
AB  - A mixture of 50.0 wt% Fe, 47.0 wt% BaTiO3, and 3.0 wt% TiO2 powders is milled and then pressed and sintered. Samples sintered from ground powders have a structure consisting of plates. They consist of the crystalline phase BaFe12O19 and crystalline and amorphous phases Fe, BaTiO3, and TiO2. Samples sintered from powders ground for more than 180 min are compact and composed of BaFe12O19 crystals embedded in an amorphous matrix consisting of amorphous BaTiO3 and TiO2 phases. Magnetization of a sample ground for 220 min gradually decreases with increasing temperature up to 440°C. This decrease result from the transition of ordered domains into chaotically directed domains. Above 440°C, the thermal energy is sufficiently large to destroy ordered paramagnetic ferromagnetic and weakly ferromagnetic domains. During sample cooling in the absence of an external magnetic field, the temperature dependence of magnetization is the same as that obtained during heating in the magnetic field. However, during the sample cooling in the magnetic field, substantially higher values of magnetization are obtained. Considerably higher magnetization of the cooled sample remains even after switching off the external magnetic field. The sintered sample, previously pressed in the magnetic field, has a higher dielectric constant than the sample pressed in the absence of the magnetic field. The dielectric constant decreases with increasing frequency.
T2  - Science of Sintering
T1  - Influence of grinding, pressing and sintering of the powder 50.0 wt% Fe, 47.0 wt% BaTiO3 and 3.0 wt% TiO2 on morphology, microstructure, magnetic and electric properties
IS  - InPress
SP  - 67
EP  - 67
DO  - 10.2298/SOS230915067L
ER  - 

@article{
author = "Luković, Milentije and Spasojević-Savković, Milica and Kosić, Olivera and Barudžija, Tanja and Lojpur, Vesna and Maričić, Aleksa and Spasojević, Miroslav",
year = "2023",
abstract = "A mixture of 50.0 wt% Fe, 47.0 wt% BaTiO3, and 3.0 wt% TiO2 powders is milled and then pressed and sintered. Samples sintered from ground powders have a structure consisting of plates. They consist of the crystalline phase BaFe12O19 and crystalline and amorphous phases Fe, BaTiO3, and TiO2. Samples sintered from powders ground for more than 180 min are compact and composed of BaFe12O19 crystals embedded in an amorphous matrix consisting of amorphous BaTiO3 and TiO2 phases. Magnetization of a sample ground for 220 min gradually decreases with increasing temperature up to 440°C. This decrease result from the transition of ordered domains into chaotically directed domains. Above 440°C, the thermal energy is sufficiently large to destroy ordered paramagnetic ferromagnetic and weakly ferromagnetic domains. During sample cooling in the absence of an external magnetic field, the temperature dependence of magnetization is the same as that obtained during heating in the magnetic field. However, during the sample cooling in the magnetic field, substantially higher values of magnetization are obtained. Considerably higher magnetization of the cooled sample remains even after switching off the external magnetic field. The sintered sample, previously pressed in the magnetic field, has a higher dielectric constant than the sample pressed in the absence of the magnetic field. The dielectric constant decreases with increasing frequency.",
journal = "Science of Sintering",
title = "Influence of grinding, pressing and sintering of the powder 50.0 wt% Fe, 47.0 wt% BaTiO3 and 3.0 wt% TiO2 on morphology, microstructure, magnetic and electric properties",
number = "InPress",
pages = "67-67",
doi = "10.2298/SOS230915067L"
}

Luković, M., Spasojević-Savković, M., Kosić, O., Barudžija, T., Lojpur, V., Maričić, A.,& Spasojević, M.. (2023). Influence of grinding, pressing and sintering of the powder 50.0 wt% Fe, 47.0 wt% BaTiO3 and 3.0 wt% TiO2 on morphology, microstructure, magnetic and electric properties. in Science of Sintering(InPress), 67-67.
https://doi.org/10.2298/SOS230915067L

Luković M, Spasojević-Savković M, Kosić O, Barudžija T, Lojpur V, Maričić A, Spasojević M. Influence of grinding, pressing and sintering of the powder 50.0 wt% Fe, 47.0 wt% BaTiO3 and 3.0 wt% TiO2 on morphology, microstructure, magnetic and electric properties. in Science of Sintering. 2023;(InPress):67-67.
doi:10.2298/SOS230915067L .

Luković, Milentije, Spasojević-Savković, Milica, Kosić, Olivera, Barudžija, Tanja, Lojpur, Vesna, Maričić, Aleksa, Spasojević, Miroslav, "Influence of grinding, pressing and sintering of the powder 50.0 wt% Fe, 47.0 wt% BaTiO3 and 3.0 wt% TiO2 on morphology, microstructure, magnetic and electric properties" in Science of Sintering, no. InPress (2023):67-67,
https://doi.org/10.2298/SOS230915067L . .

TY  - CONF
AU  - Janković, Milan
AU  - Petrović, Ana
AU  - Lojpur, Vesna
AU  - Miloš, Marko
AU  - Balać, Igor
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11653
AB  - Short carbon fibres (SCF) have been introduced in additive manufacturing (AM) of polymer-based parts designed for moderate loadings. Alongside other influential parameters for the strength and stiffness of thus obtained composite materials, scientific papers in AM field emphasize the effect of raster angle (printing direction) applied. Consequently, this study considers the idea of comparing the yield strength values experimentally evaluated for plate specimens additively manufactured from SCF-reinforced PET-G filament applying different raster angles with theoretical tensile strength vs fibre orientation curves already known from Classical Lamination Theory (CLT) for continuous fibre-reinforced composite laminas. Among many failure criteria relevant to ductile isotropic materials, maximum distortional energy criterion (von Mises) is the most widely used. Thus, von Mises criterion is usually used for predicting the onset of yielding in isotropic metals. However, for anisotropic composite materials, such as thin plates made from continuous fibre-reinforced polymers, the use of von Mises failure criterion is not applicable. Therefore, quadratic interaction criteria (e.g. Tsai-Hill) are often proposed for such materials. In this study, Tsai-Hill quadratic interaction criterion is implemented in order to predict the onset of yielding (failure) of thin composite plates made from SCF-reinforced PET-G. The off-axis tensile test is used to experimentally evaluate the failure of test samples printed with different raster angles. Linear-elastic material behaviour model was determined by modulus of elasticity and the value of yield strength for each sample set (seven sets were observed, raster angle ranging from 0° to 90° with the increment of 15°). Obtained results suggest that Tsai-Hill quadratic interaction criterion can be considered as a potential candidate for criterion capable to predict the onset of yielding (failure) of thin composite plates additively manufactured from SCF-reinforced PET-G material.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
T1  - Potential of applying the quadratic failure criteria for short carbon fibre-reinforced PET-G composite material used in additive manufacturing
SP  - 84
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11653
ER  - 

@conference{
author = "Janković, Milan and Petrović, Ana and Lojpur, Vesna and Miloš, Marko and Balać, Igor",
year = "2023",
abstract = "Short carbon fibres (SCF) have been introduced in additive manufacturing (AM) of polymer-based parts designed for moderate loadings. Alongside other influential parameters for the strength and stiffness of thus obtained composite materials, scientific papers in AM field emphasize the effect of raster angle (printing direction) applied. Consequently, this study considers the idea of comparing the yield strength values experimentally evaluated for plate specimens additively manufactured from SCF-reinforced PET-G filament applying different raster angles with theoretical tensile strength vs fibre orientation curves already known from Classical Lamination Theory (CLT) for continuous fibre-reinforced composite laminas. Among many failure criteria relevant to ductile isotropic materials, maximum distortional energy criterion (von Mises) is the most widely used. Thus, von Mises criterion is usually used for predicting the onset of yielding in isotropic metals. However, for anisotropic composite materials, such as thin plates made from continuous fibre-reinforced polymers, the use of von Mises failure criterion is not applicable. Therefore, quadratic interaction criteria (e.g. Tsai-Hill) are often proposed for such materials. In this study, Tsai-Hill quadratic interaction criterion is implemented in order to predict the onset of yielding (failure) of thin composite plates made from SCF-reinforced PET-G. The off-axis tensile test is used to experimentally evaluate the failure of test samples printed with different raster angles. Linear-elastic material behaviour model was determined by modulus of elasticity and the value of yield strength for each sample set (seven sets were observed, raster angle ranging from 0° to 90° with the increment of 15°). Obtained results suggest that Tsai-Hill quadratic interaction criterion can be considered as a potential candidate for criterion capable to predict the onset of yielding (failure) of thin composite plates additively manufactured from SCF-reinforced PET-G material.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro",
title = "Potential of applying the quadratic failure criteria for short carbon fibre-reinforced PET-G composite material used in additive manufacturing",
pages = "84",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11653"
}

Janković, M., Petrović, A., Lojpur, V., Miloš, M.,& Balać, I.. (2023). Potential of applying the quadratic failure criteria for short carbon fibre-reinforced PET-G composite material used in additive manufacturing. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro
Belgrade : Materials Research Society of Serbia., 84.
https://hdl.handle.net/21.15107/rcub_vinar_11653

Janković M, Petrović A, Lojpur V, Miloš M, Balać I. Potential of applying the quadratic failure criteria for short carbon fibre-reinforced PET-G composite material used in additive manufacturing. in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro. 2023;:84.
https://hdl.handle.net/21.15107/rcub_vinar_11653 .

Janković, Milan, Petrović, Ana, Lojpur, Vesna, Miloš, Marko, Balać, Igor, "Potential of applying the quadratic failure criteria for short carbon fibre-reinforced PET-G composite material used in additive manufacturing" in YUCOMAT 2023 : 24th Annual Conference YUCOMAT 2023 : programme and the book of abstracts; September 4-8, 2023; Herceg Novi, Montenegro (2023):84,
https://hdl.handle.net/21.15107/rcub_vinar_11653 .

TY  - JOUR
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Nikolić, Marko G.
AU  - Erčić, Jelena
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10437
AB  - In this manuscript, down-conversion nanopowders of SrGd2O4 doped with different concentrations of either Dy3+ or Sm3+ ions were examined in detail. All samples were prepared via glycine-assisted combustion method, primarily burned at 500ºC for 1.5 h and additionally calcined at 1000ºC for 2 h, at ambient room temperature. The XRD analysis showed that all samples crystallize as single phase and the orthorhombic lattice SrGd2O4. TEM analysis determined high degree of crystallinity of samples with grain size of approximately 200 nm for Dy3+ doped and 150 nm for Sm3+ doped SrGd2O4. For both samples SAED confirmed that diffraction rings correspond to the hkl plane indices of SrGd2O4, while EDS confirmed presence of Dy in crystal structure. Results of luminescent characterization demonstrated all appropriate emission peaks related to either Dy3+ or Sm3+ dopant ions. Investigation of dopant concentration revealed that the lowest values of both dopants have the most prominent emission peaks, while coordinates obtained from the CIE diagram showed emission shifting with the change of concentration.
T2  - Science of Sintering
T1  - Structural and Luminescence Properties of SrGd2O4 nanocrystalline Phosphor doped with Dy3+ and Sm3+
VL  - 54
IS  - 3
DO  - 10.2298/SOS2203295S
ER  - 

@article{
author = "Stamenković, Tijana and Radmilović, Nadežda and Nikolić, Marko G. and Erčić, Jelena and Lojpur, Vesna",
year = "2022",
abstract = "In this manuscript, down-conversion nanopowders of SrGd2O4 doped with different concentrations of either Dy3+ or Sm3+ ions were examined in detail. All samples were prepared via glycine-assisted combustion method, primarily burned at 500ºC for 1.5 h and additionally calcined at 1000ºC for 2 h, at ambient room temperature. The XRD analysis showed that all samples crystallize as single phase and the orthorhombic lattice SrGd2O4. TEM analysis determined high degree of crystallinity of samples with grain size of approximately 200 nm for Dy3+ doped and 150 nm for Sm3+ doped SrGd2O4. For both samples SAED confirmed that diffraction rings correspond to the hkl plane indices of SrGd2O4, while EDS confirmed presence of Dy in crystal structure. Results of luminescent characterization demonstrated all appropriate emission peaks related to either Dy3+ or Sm3+ dopant ions. Investigation of dopant concentration revealed that the lowest values of both dopants have the most prominent emission peaks, while coordinates obtained from the CIE diagram showed emission shifting with the change of concentration.",
journal = "Science of Sintering",
title = "Structural and Luminescence Properties of SrGd2O4 nanocrystalline Phosphor doped with Dy3+ and Sm3+",
volume = "54",
number = "3",
doi = "10.2298/SOS2203295S"
}

Stamenković, T., Radmilović, N., Nikolić, M. G., Erčić, J.,& Lojpur, V.. (2022). Structural and Luminescence Properties of SrGd2O4 nanocrystalline Phosphor doped with Dy3+ and Sm3+. in Science of Sintering, 54(3).
https://doi.org/10.2298/SOS2203295S

Stamenković T, Radmilović N, Nikolić MG, Erčić J, Lojpur V. Structural and Luminescence Properties of SrGd2O4 nanocrystalline Phosphor doped with Dy3+ and Sm3+. in Science of Sintering. 2022;54(3).
doi:10.2298/SOS2203295S .

Stamenković, Tijana, Radmilović, Nadežda, Nikolić, Marko G., Erčić, Jelena, Lojpur, Vesna, "Structural and Luminescence Properties of SrGd2O4 nanocrystalline Phosphor doped with Dy3+ and Sm3+" in Science of Sintering, 54, no. 3 (2022),
https://doi.org/10.2298/SOS2203295S . .

TY  - CONF
AU  - Dinić, Ivana
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Vuković, Marina
AU  - Rabasović, Mihailo
AU  - Lojpur, Vesna
AU  - Mančić, Lidija
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10794
AB  - Up-conversion properties of SrGd2O4 nanoparticles co-doped with different Yb3+ and constant Er3+ ions were successfully prepared via sol- gel assisted combustion. Rietveld refinement and scanning/transmission electron microscopy with corresponding energydispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles with orthorhombic (Pnma) structure that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the upconversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm ( 2 H11/2, 4 S3/2 → 4 I15/2) as well as a red emission at 661 nm (4 F9/2 → 4 I15/2). The highest value of absolute quantum efficiency (0.055%) is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc=976 nm, power density 200W/cm2 ).
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles
SP  - 59
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10794
ER  - 

@conference{
author = "Dinić, Ivana and Stamenković, Tijana and Radmilović, Nadežda and Vuković, Marina and Rabasović, Mihailo and Lojpur, Vesna and Mančić, Lidija",
year = "2022",
abstract = "Up-conversion properties of SrGd2O4 nanoparticles co-doped with different Yb3+ and constant Er3+ ions were successfully prepared via sol- gel assisted combustion. Rietveld refinement and scanning/transmission electron microscopy with corresponding energydispersive X-ray spectroscopy revealed that obtained powders are composed of agglomerated nanoparticles with orthorhombic (Pnma) structure that have a uniform distribution of all constituting elements. Photoluminescence measurements implied intensification of the upconversion (UC) emission in the visible part of spectrum with the increase of Yb3+ content, which is followed by a significant change in the green to red ratio. Two-photon UC processes are established as a result of Er3+ f-f electronic transitions: green emission at 523 and 551 nm ( 2 H11/2, 4 S3/2 → 4 I15/2) as well as a red emission at 661 nm (4 F9/2 → 4 I15/2). The highest value of absolute quantum efficiency (0.055%) is determined for SrGd2O4 nanoparticles doped with 0.5 at% of Er3+ and co-doped with 5 at% of Yb3+ (λexc=976 nm, power density 200W/cm2 ).",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles",
pages = "59",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10794"
}

Dinić, I., Stamenković, T., Radmilović, N., Vuković, M., Rabasović, M., Lojpur, V.,& Mančić, L.. (2022). Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 59.
https://hdl.handle.net/21.15107/rcub_vinar_10794

Dinić I, Stamenković T, Radmilović N, Vuković M, Rabasović M, Lojpur V, Mančić L. Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:59.
https://hdl.handle.net/21.15107/rcub_vinar_10794 .

Dinić, Ivana, Stamenković, Tijana, Radmilović, Nadežda, Vuković, Marina, Rabasović, Mihailo, Lojpur, Vesna, Mančić, Lidija, "Quantum efficiency of up-converting SrGd2O4:Yb,Er nanoparticles" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):59,
https://hdl.handle.net/21.15107/rcub_vinar_10794 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Lojpur, Vesna
AU  - Radmilović, Nadežda
AU  - Vuković, Marina
AU  - Dinić, Ivana
AU  - Mančić, Lidija
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10807
AB  - Optically active materials have a wide range of applications. The phenomenon of light conversion includes two main types: up-conversion, which is the ability of convertion lower energy photons into the ones with the higher energy, and down-conversion, which is vice versa. Orthorhorhombic SrGd2O4 doped with rare earth elements is established to have promising optical characteristics, but rarely explored until nowadays as up-converting material. Due to the phonon energy of around 475 cm-1, which is lower than in many other compounds commonly used hosts, this one has a great perspective as an optically active material. Here, for the first time two combinations of rare earth dopant ions, Yb3+/Ho3+ and Yb3+/Tm3+, with different mutual ratios were chosen as pairs for inducing up-conversion. Sol-gel assisted combustion synthesis, which comprises citric acid as chelator and glycine as fuel, was used to obtain powdered samples that are subsequently thermally treated for 3.5 h at 1100°C. X-ray powder diffraction analysis (XRPD) was performed to determine crystal structure. Morphology characteristics were observed by scanning and transmission electron microscopy (SEM/TEM). Photoluminescent up-converting properties were measured in function of laser power (976 nm) in order to define optimal doping concentration and upconversion mechanism.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping
SP  - 76
EP  - 77
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10807
ER  - 

@conference{
author = "Stamenković, Tijana and Lojpur, Vesna and Radmilović, Nadežda and Vuković, Marina and Dinić, Ivana and Mančić, Lidija",
year = "2022",
abstract = "Optically active materials have a wide range of applications. The phenomenon of light conversion includes two main types: up-conversion, which is the ability of convertion lower energy photons into the ones with the higher energy, and down-conversion, which is vice versa. Orthorhorhombic SrGd2O4 doped with rare earth elements is established to have promising optical characteristics, but rarely explored until nowadays as up-converting material. Due to the phonon energy of around 475 cm-1, which is lower than in many other compounds commonly used hosts, this one has a great perspective as an optically active material. Here, for the first time two combinations of rare earth dopant ions, Yb3+/Ho3+ and Yb3+/Tm3+, with different mutual ratios were chosen as pairs for inducing up-conversion. Sol-gel assisted combustion synthesis, which comprises citric acid as chelator and glycine as fuel, was used to obtain powdered samples that are subsequently thermally treated for 3.5 h at 1100°C. X-ray powder diffraction analysis (XRPD) was performed to determine crystal structure. Morphology characteristics were observed by scanning and transmission electron microscopy (SEM/TEM). Photoluminescent up-converting properties were measured in function of laser power (976 nm) in order to define optimal doping concentration and upconversion mechanism.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping",
pages = "76-77",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10807"
}

Stamenković, T., Lojpur, V., Radmilović, N., Vuković, M., Dinić, I.,& Mančić, L.. (2022). Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 76-77.
https://hdl.handle.net/21.15107/rcub_vinar_10807

Stamenković T, Lojpur V, Radmilović N, Vuković M, Dinić I, Mančić L. Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:76-77.
https://hdl.handle.net/21.15107/rcub_vinar_10807 .

Stamenković, Tijana, Lojpur, Vesna, Radmilović, Nadežda, Vuković, Marina, Dinić, Ivana, Mančić, Lidija, "Optically active SrGd2O4 phase: Yb3+/Ho3+ and Yb3+/Tm3+ co-doping" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):76-77,
https://hdl.handle.net/21.15107/rcub_vinar_10807 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Popović, Maja
AU  - Pjević, Dejan
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11508
AB  - In this study, we present surface examination and investigation of the photocatalytic activity of a newly synthesized down-conversion luminescent nanomaterial SrGd2O4 doped with Dy3+ ions. Samples were prepared via glycineassisted combustion method, were formed gel was firstly burned at 500 °C for 1.5 h and then calcined at 1000 °C for 2.5 h. To see the crystallinity and phase purity, Xray diffraction (XRD) measurements were performed and showed that doped sample crystallizes as a single phase with the orthorhombic lattice of SrGd2O4. Luminescent characterization indicated presence of all appropriate emission peaks related to Dy3+ dopant ions. X-ray photoelectron spectroscopy (XPS) was used to investigate surface composition and survey spectra confirmed presence of expected elements (Sr, Gd, O and Dy). Photocatalytic properties of SrGd2O4:Dy were explored in the photocatalytic degradation of organic dye methyl orange (MO) under simulated solar light irradiation. UV/Vis spectrometer was used to measure a decrease in MO concentration in water solutions during the experiment. Aliquots of the working solutions were taken at the exact time intervals, and the results indicate successful dye decomposition rate after 4 h.
PB  - University of Belgrade : Institute for Multidisciplinary Research
C3  - 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
T1  - Surface characterization and photocatalytic activity of newly synthesized Dy doped SrGd2O4 phosphorus
SP  - 61
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11508
ER  - 

@conference{
author = "Stamenković, Tijana and Popović, Maja and Pjević, Dejan and Čebela, Maria and Lojpur, Vesna",
year = "2022",
abstract = "In this study, we present surface examination and investigation of the photocatalytic activity of a newly synthesized down-conversion luminescent nanomaterial SrGd2O4 doped with Dy3+ ions. Samples were prepared via glycineassisted combustion method, were formed gel was firstly burned at 500 °C for 1.5 h and then calcined at 1000 °C for 2.5 h. To see the crystallinity and phase purity, Xray diffraction (XRD) measurements were performed and showed that doped sample crystallizes as a single phase with the orthorhombic lattice of SrGd2O4. Luminescent characterization indicated presence of all appropriate emission peaks related to Dy3+ dopant ions. X-ray photoelectron spectroscopy (XPS) was used to investigate surface composition and survey spectra confirmed presence of expected elements (Sr, Gd, O and Dy). Photocatalytic properties of SrGd2O4:Dy were explored in the photocatalytic degradation of organic dye methyl orange (MO) under simulated solar light irradiation. UV/Vis spectrometer was used to measure a decrease in MO concentration in water solutions during the experiment. Aliquots of the working solutions were taken at the exact time intervals, and the results indicate successful dye decomposition rate after 4 h.",
publisher = "University of Belgrade : Institute for Multidisciplinary Research",
journal = "6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade",
title = "Surface characterization and photocatalytic activity of newly synthesized Dy doped SrGd2O4 phosphorus",
pages = "61",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11508"
}

Stamenković, T., Popović, M., Pjević, D., Čebela, M.,& Lojpur, V.. (2022). Surface characterization and photocatalytic activity of newly synthesized Dy doped SrGd2O4 phosphorus. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
University of Belgrade : Institute for Multidisciplinary Research., 61.
https://hdl.handle.net/21.15107/rcub_vinar_11508

Stamenković T, Popović M, Pjević D, Čebela M, Lojpur V. Surface characterization and photocatalytic activity of newly synthesized Dy doped SrGd2O4 phosphorus. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade. 2022;:61.
https://hdl.handle.net/21.15107/rcub_vinar_11508 .

Stamenković, Tijana, Popović, Maja, Pjević, Dejan, Čebela, Maria, Lojpur, Vesna, "Surface characterization and photocatalytic activity of newly synthesized Dy doped SrGd2O4 phosphorus" in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade (2022):61,
https://hdl.handle.net/21.15107/rcub_vinar_11508 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11511
AB  - Here, samples of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at.%) ions and constant concentration of Tm3+ (1 at.%) were prepared. For preparation of samples, combustion method assisted with glycine as a fuel and citric acid as a chelator was chosen. All samples were heated in the furnace at 500 °C for 1.5 h and additionally thermally treated for 2.5 h at 1000 °C. X-ray diffraction (XRD) revealed that all peaks are assigned to the pure orthorhombic lattice of SrGd2O4, space group Pnma (JCPDS Card No.:01-072-6387). Field emission scanning electron microscopy (FE-SEM) showed agglomerated spherical particles with size around 150 nm. Energy dispersive spectroscopy confirmed uniform distribution of constitutive elements through the samples. Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 980 nm. Dominant blue emission with appropriate transition 1G4 → 3H6 is detected in all samples, for which three photons are required.
PB  - University of Belgrade : Institute for Multidisciplinary Research
C3  - 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
T1  - Influence of Yb3+ concentration on structural and luminescent properties of Tm3+ doped SrGd2O4
SP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11511
ER  - 

@conference{
author = "Stamenković, Tijana and Radmilović, Nadežda and Čebela, Maria and Lojpur, Vesna",
year = "2022",
abstract = "Here, samples of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at.%) ions and constant concentration of Tm3+ (1 at.%) were prepared. For preparation of samples, combustion method assisted with glycine as a fuel and citric acid as a chelator was chosen. All samples were heated in the furnace at 500 °C for 1.5 h and additionally thermally treated for 2.5 h at 1000 °C. X-ray diffraction (XRD) revealed that all peaks are assigned to the pure orthorhombic lattice of SrGd2O4, space group Pnma (JCPDS Card No.:01-072-6387). Field emission scanning electron microscopy (FE-SEM) showed agglomerated spherical particles with size around 150 nm. Energy dispersive spectroscopy confirmed uniform distribution of constitutive elements through the samples. Up-conversion emission properties were evaluated from photoluminescent emission spectra and intensity dependence on excitation power after excitation at 980 nm. Dominant blue emission with appropriate transition 1G4 → 3H6 is detected in all samples, for which three photons are required.",
publisher = "University of Belgrade : Institute for Multidisciplinary Research",
journal = "6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade",
title = "Influence of Yb3+ concentration on structural and luminescent properties of Tm3+ doped SrGd2O4",
pages = "37",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11511"
}

Stamenković, T., Radmilović, N., Čebela, M.,& Lojpur, V.. (2022). Influence of Yb3+ concentration on structural and luminescent properties of Tm3+ doped SrGd2O4. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade
University of Belgrade : Institute for Multidisciplinary Research., 37.
https://hdl.handle.net/21.15107/rcub_vinar_11511

Stamenković T, Radmilović N, Čebela M, Lojpur V. Influence of Yb3+ concentration on structural and luminescent properties of Tm3+ doped SrGd2O4. in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade. 2022;:37.
https://hdl.handle.net/21.15107/rcub_vinar_11511 .

Stamenković, Tijana, Radmilović, Nadežda, Čebela, Maria, Lojpur, Vesna, "Influence of Yb3+ concentration on structural and luminescent properties of Tm3+ doped SrGd2O4" in 6CSCS : 6th Serbian Ceramic Society Conference : programme and the book of abstracts; June 28-29; Belgrade (2022):37,
https://hdl.handle.net/21.15107/rcub_vinar_11511 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11515
AB  - In this investigation, samples of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at%) ions and constant concentration of Ho3+ (1 at%) were prepared. As for synthesis we chose combustion method assisted with glycine as a fuel and citric acid as a chelator. All samples were burned in the furnace at 500 °C for 1.5h and afterwards additionally thermally treated for 2.5 h at 1000 °C. X-ray diffraction (XRD) showed peaks that correspond to the pure orthorhombic lattice of SrGd2O4, space group Pnma (JCPDS Card No.:01-072-6387). FE-SEM micrographs revealed agglomerated phenomenon with spherical shape and diameter around 200 nm. Energy dispersive X-ray spectroscopy (EDS) verified uniform distribution of all constituting elements in particles. Powders optical characterization include measurement of up-conversion (UC) emission spectra after excitation at 980 nm, as well as up-converted intensity dependence on excitation power. Dominant green emission 5F4, 5S2 → 5 I8 was found in all samples, with the most intense emission with 2 at% of Yb3+ and dependence of intensity of UC emission on excitation power confirmed that green emission is facilitated by energy transfer mechanism with two photons.
PB  - University of Belgrade : Faculty of Physical Chemistry
C3  - COIN 2022 : Contemporary Batteries and Supercapacitors - International Symposium Belgrade 2022 : program and book of abstracts; June 1-2; Belgrade
T1  - The Synthesis and Characterization of Yb3+ and Ho3+ Doped SrGd2O4
SP  - 41
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11515
ER  - 

@conference{
author = "Stamenković, Tijana and Čebela, Maria and Lojpur, Vesna",
year = "2022",
abstract = "In this investigation, samples of SrGd2O4 doped with different concentration of Yb3+ (2, 4, 6 at%) ions and constant concentration of Ho3+ (1 at%) were prepared. As for synthesis we chose combustion method assisted with glycine as a fuel and citric acid as a chelator. All samples were burned in the furnace at 500 °C for 1.5h and afterwards additionally thermally treated for 2.5 h at 1000 °C. X-ray diffraction (XRD) showed peaks that correspond to the pure orthorhombic lattice of SrGd2O4, space group Pnma (JCPDS Card No.:01-072-6387). FE-SEM micrographs revealed agglomerated phenomenon with spherical shape and diameter around 200 nm. Energy dispersive X-ray spectroscopy (EDS) verified uniform distribution of all constituting elements in particles. Powders optical characterization include measurement of up-conversion (UC) emission spectra after excitation at 980 nm, as well as up-converted intensity dependence on excitation power. Dominant green emission 5F4, 5S2 → 5 I8 was found in all samples, with the most intense emission with 2 at% of Yb3+ and dependence of intensity of UC emission on excitation power confirmed that green emission is facilitated by energy transfer mechanism with two photons.",
publisher = "University of Belgrade : Faculty of Physical Chemistry",
journal = "COIN 2022 : Contemporary Batteries and Supercapacitors - International Symposium Belgrade 2022 : program and book of abstracts; June 1-2; Belgrade",
title = "The Synthesis and Characterization of Yb3+ and Ho3+ Doped SrGd2O4",
pages = "41",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11515"
}

Stamenković, T., Čebela, M.,& Lojpur, V.. (2022). The Synthesis and Characterization of Yb3+ and Ho3+ Doped SrGd2O4. in COIN 2022 : Contemporary Batteries and Supercapacitors - International Symposium Belgrade 2022 : program and book of abstracts; June 1-2; Belgrade
University of Belgrade : Faculty of Physical Chemistry., 41.
https://hdl.handle.net/21.15107/rcub_vinar_11515

Stamenković T, Čebela M, Lojpur V. The Synthesis and Characterization of Yb3+ and Ho3+ Doped SrGd2O4. in COIN 2022 : Contemporary Batteries and Supercapacitors - International Symposium Belgrade 2022 : program and book of abstracts; June 1-2; Belgrade. 2022;:41.
https://hdl.handle.net/21.15107/rcub_vinar_11515 .

Stamenković, Tijana, Čebela, Maria, Lojpur, Vesna, "The Synthesis and Characterization of Yb3+ and Ho3+ Doped SrGd2O4" in COIN 2022 : Contemporary Batteries and Supercapacitors - International Symposium Belgrade 2022 : program and book of abstracts; June 1-2; Belgrade (2022):41,
https://hdl.handle.net/21.15107/rcub_vinar_11515 .