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  - 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  - 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  - 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  - 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  - 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  - 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  - 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 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Čebela, Maria
AU  - Prekajski Đorđević, Marija
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12859
AB  - Nanopowders of a new up-conversion materials, SrGd 2 O4 co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er 3+ (0.5 at%) concentrations were prepared by combustion method. X-ray powder diffraction (XRPD) showed that nanoparticles have orthorhombic structure (Pnma), assigned to the JCPDS Card No:01-072-6387. Rietveld refinement indicated a decrease in the size of the unit cell, lattice parameters, and cell volume, due to successful doping of Yb3+ and Er 3+ ions into the host structure. Transmission electron microscopy (TEM) revealed that obtained nanostructure is composed of agglomerated nanoparticles, while energy dispersive spectroscopy (EDS) confirmed uniform distribution of all constituting elements in them. Up-conversion (UC) luminescence spectra measured in function of laser pumping power indicated that two-photon UC process is established in nanoparticles as a result of the trivalent erbium f-f electronic transitions: two green emission bands at 523 and 551 nm ( 2 H11/2 , 4 S 3/2 → 4 I 15/2) as well as a red emission band at 661 nm ( 4 F9/2 → 4 I 15/2). The rise of Yb3+ concentration from 1 to 5 at% provokes a significant change of the green to red ratio showing the ability to fine-tuning the color output.
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  - Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
T1  - Investigation of Yb3+/Er3+ doped SrGd2O4 up-conversion nanomaterial obtained via combustion synthesis
SP  - 50
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12859
ER  - 

@conference{
author = "Stamenković, Tijana and Radmilović, Nadežda and Čebela, Maria and Prekajski Đorđević, Marija and Lojpur, Vesna",
year = "2022",
abstract = "Nanopowders of a new up-conversion materials, SrGd 2 O4 co-doped with different Yb3+ (1, 2.5 and 5 at%) and constant Er 3+ (0.5 at%) concentrations were prepared by combustion method. X-ray powder diffraction (XRPD) showed that nanoparticles have orthorhombic structure (Pnma), assigned to the JCPDS Card No:01-072-6387. Rietveld refinement indicated a decrease in the size of the unit cell, lattice parameters, and cell volume, due to successful doping of Yb3+ and Er 3+ ions into the host structure. Transmission electron microscopy (TEM) revealed that obtained nanostructure is composed of agglomerated nanoparticles, while energy dispersive spectroscopy (EDS) confirmed uniform distribution of all constituting elements in them. Up-conversion (UC) luminescence spectra measured in function of laser pumping power indicated that two-photon UC process is established in nanoparticles as a result of the trivalent erbium f-f electronic transitions: two green emission bands at 523 and 551 nm ( 2 H11/2 , 4 S 3/2 → 4 I 15/2) as well as a red emission band at 661 nm ( 4 F9/2 → 4 I 15/2). The rise of Yb3+ concentration from 1 to 5 at% provokes a significant change of the green to red ratio showing the ability to fine-tuning the color output.",
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 = "Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022",
title = "Investigation of Yb3+/Er3+ doped SrGd2O4 up-conversion nanomaterial obtained via combustion synthesis",
pages = "50-50",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12859"
}

Stamenković, T., Radmilović, N., Čebela, M., Prekajski Đorđević, M.,& Lojpur, V.. (2022). Investigation of Yb3+/Er3+ doped SrGd2O4 up-conversion nanomaterial obtained via combustion synthesis. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 50-50.
https://hdl.handle.net/21.15107/rcub_vinar_12859

Stamenković T, Radmilović N, Čebela M, Prekajski Đorđević M, Lojpur V. Investigation of Yb3+/Er3+ doped SrGd2O4 up-conversion nanomaterial obtained via combustion synthesis. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022. 2022;:50-50.
https://hdl.handle.net/21.15107/rcub_vinar_12859 .

Stamenković, Tijana, Radmilović, Nadežda, Čebela, Maria, Prekajski Đorđević, Marija, Lojpur, Vesna, "Investigation of Yb3+/Er3+ doped SrGd2O4 up-conversion nanomaterial obtained via combustion synthesis" in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022 (2022):50-50,
https://hdl.handle.net/21.15107/rcub_vinar_12859 .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Radmilović, Nadežda
AU  - Erčić, Jelena
AU  - Čebela, Maria
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12860
AB  - In this investigation, down-conversion nanopowders of SrGd 2 O 4 doped with different concentrations of either Dy3+ or Sm3+ ions were examined. All samples were prepared via glycine-assisted combustion method, first burned at 500 ºC for 1.5h and additionally calcined at 1000 ºC for 2.5h, at ambient room temperature. The XRD analysis confirmed 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 Dy 3+ doped and 150 nm for Sm 3+ doped SrGd2 O 4 . For both samples SAED showed that diffraction rings correspond to the hkl plane indices of SrGd 2 O 4 , while EDS indicated presence of Dy in crystal structure. Results of luminescent characterization demonstrated all appropriate emission peaks related to either Dy3+ or Sm 3+ 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.
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  - Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
T1  - Synthesis and characterization of a new Dy3+ and Sm3+ doped SrGd2O4 down-conversion    nanomaterial obtained via glycine-assisted combustion synthesis
SP  - 51
EP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12860
ER  - 

@conference{
author = "Stamenković, Tijana and Radmilović, Nadežda and Erčić, Jelena and Čebela, Maria and Lojpur, Vesna",
year = "2022",
abstract = "In this investigation, down-conversion nanopowders of SrGd 2 O 4 doped with different concentrations of either Dy3+ or Sm3+ ions were examined. All samples were prepared via glycine-assisted combustion method, first burned at 500 ºC for 1.5h and additionally calcined at 1000 ºC for 2.5h, at ambient room temperature. The XRD analysis confirmed 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 Dy 3+ doped and 150 nm for Sm 3+ doped SrGd2 O 4 . For both samples SAED showed that diffraction rings correspond to the hkl plane indices of SrGd 2 O 4 , while EDS indicated presence of Dy in crystal structure. Results of luminescent characterization demonstrated all appropriate emission peaks related to either Dy3+ or Sm 3+ 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.",
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 = "Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022",
title = "Synthesis and characterization of a new Dy3+ and Sm3+ doped SrGd2O4 down-conversion    nanomaterial obtained via glycine-assisted combustion synthesis",
pages = "51-51",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12860"
}

Stamenković, T., Radmilović, N., Erčić, J., Čebela, M.,& Lojpur, V.. (2022). Synthesis and characterization of a new Dy3+ and Sm3+ doped SrGd2O4 down-conversion    nanomaterial obtained via glycine-assisted combustion synthesis. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 51-51.
https://hdl.handle.net/21.15107/rcub_vinar_12860

Stamenković T, Radmilović N, Erčić J, Čebela M, Lojpur V. Synthesis and characterization of a new Dy3+ and Sm3+ doped SrGd2O4 down-conversion    nanomaterial obtained via glycine-assisted combustion synthesis. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022. 2022;:51-51.
https://hdl.handle.net/21.15107/rcub_vinar_12860 .

Stamenković, Tijana, Radmilović, Nadežda, Erčić, Jelena, Čebela, Maria, Lojpur, Vesna, "Synthesis and characterization of a new Dy3+ and Sm3+ doped SrGd2O4 down-conversion    nanomaterial obtained via glycine-assisted combustion synthesis" in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022 (2022):51-51,
https://hdl.handle.net/21.15107/rcub_vinar_12860 .

TY  - CONF
AU  - Radmilović, Nadežda
AU  - Stamenković, Tijana
AU  - Lojpur, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12862
AB  - Luminescent materials emit radiation when exposed to various types of excitation (ultraviolet radiation, X-rays, electron beam, etc.) and can be comprised of a host lattice with dopant as an activator. One of the extensively investigated luminescent materials is monoclinic Ln2 MoO6 due to its high thermal stability. In this study, we investigated Ln2MoO 6 with different concentrations of Er 3+ /Yb3+ concentrations synthetized at temperatures up to 1200o C. The obtained powders were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence spectroscopy (PL). The results revealed that all powders are single phase Ln2 MoO6 , with particle size in the nano range at lower treatment temperatures (up to 800 o C) and in the micro range at higher calcination temperatures (up to 1200 o C). Both Y 2 MoO 6 :Yb3+ /Er 3+ and Gd2 MoO 6 : Yb3+ /Er 3+ show double emitting luminescence two green emission bands at 525 and 546 nm (2 H 11/2 , 4 S 3/2 → 4 I 15/2 ) as well as a red emission band at 657 nm ( 4 F 9/2 → 4 I 15/2 ). It can be concluded that increase of Yb3+ concentration leads to change of the green to red ratio showing the ability for fine-tuning of the color output.
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  - Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
T1  - Influence of host lattice on luminescence properties of up-conversion Ln2MoO6 (Ln=Y, Gd) powders co-doped with Er3+/Yb3+ synthesized at high temperatures
SP  - 62
EP  - 62
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12862
ER  - 

@conference{
author = "Radmilović, Nadežda and Stamenković, Tijana and Lojpur, Vesna",
year = "2022",
abstract = "Luminescent materials emit radiation when exposed to various types of excitation (ultraviolet radiation, X-rays, electron beam, etc.) and can be comprised of a host lattice with dopant as an activator. One of the extensively investigated luminescent materials is monoclinic Ln2 MoO6 due to its high thermal stability. In this study, we investigated Ln2MoO 6 with different concentrations of Er 3+ /Yb3+ concentrations synthetized at temperatures up to 1200o C. The obtained powders were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and photoluminescence spectroscopy (PL). The results revealed that all powders are single phase Ln2 MoO6 , with particle size in the nano range at lower treatment temperatures (up to 800 o C) and in the micro range at higher calcination temperatures (up to 1200 o C). Both Y 2 MoO 6 :Yb3+ /Er 3+ and Gd2 MoO 6 : Yb3+ /Er 3+ show double emitting luminescence two green emission bands at 525 and 546 nm (2 H 11/2 , 4 S 3/2 → 4 I 15/2 ) as well as a red emission band at 657 nm ( 4 F 9/2 → 4 I 15/2 ). It can be concluded that increase of Yb3+ concentration leads to change of the green to red ratio showing the ability for fine-tuning of the color output.",
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 = "Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022",
title = "Influence of host lattice on luminescence properties of up-conversion Ln2MoO6 (Ln=Y, Gd) powders co-doped with Er3+/Yb3+ synthesized at high temperatures",
pages = "62-62",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12862"
}

Radmilović, N., Stamenković, T.,& Lojpur, V.. (2022). Influence of host lattice on luminescence properties of up-conversion Ln2MoO6 (Ln=Y, Gd) powders co-doped with Er3+/Yb3+ synthesized at high temperatures. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022
Belgrade : Vinča Institute of Nuclear Sciences - National Institute of thе Republic of Serbia, University of Belgrade., 62-62.
https://hdl.handle.net/21.15107/rcub_vinar_12862

Radmilović N, Stamenković T, Lojpur V. Influence of host lattice on luminescence properties of up-conversion Ln2MoO6 (Ln=Y, Gd) powders co-doped with Er3+/Yb3+ synthesized at high temperatures. in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022. 2022;:62-62.
https://hdl.handle.net/21.15107/rcub_vinar_12862 .

Radmilović, Nadežda, Stamenković, Tijana, Lojpur, Vesna, "Influence of host lattice on luminescence properties of up-conversion Ln2MoO6 (Ln=Y, Gd) powders co-doped with Er3+/Yb3+ synthesized at high temperatures" in Program and Book of abstracts of the 1st Intentational conference on innovativ materials in extreme conditions IMEC2022 (2022):62-62,
https://hdl.handle.net/21.15107/rcub_vinar_12862 .

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  - 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  - 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  - 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  - JOUR
AU  - Stamenković, Tijana
AU  - Bundaleski, Nenad
AU  - Barudžija, Tanja
AU  - Validžić, Ivana Lj.
AU  - Lojpur, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9894
AB  - X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements are used for investigating incorporation of iodine and tin into the stibnite (Sb2S3) lattice, as well as for determining surface composition and structure, respectively. The XRD analysis revealed the visible presence of a single phase, that of pure orthorhombic Sb2S3 structure. XPS survey spectra confirmed the presence of expected elements (Sb, S, Sn and I) at the surface of corresponding samples. Since the bonding identification was hindered by non-uniform charging of samples during acquiring the photoelectron spectra, a novel approach for the analysis of high resolution spectra was proposed and successfully implemented. XPS results showed that surface composition of the non-doped sample coincides with that of the bulk, while doping strongly affects surface of the samples. Sn-doped sample appears to be prone to surface oxidation. The presence of Sb2S3, Sb2O3, SnS2 and Sn(0) phases at the surface was revealed. Strong segregation of antimony was observed in the I-doped Sb2S3 sample. Iodine is also present at the surface in the form of the SbI3 phase, while the detected sulphur signal most probably corresponds to S atoms from unaltered deeper layers.
T2  - Applied Surface Science
T1  - XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging
VL  - 567
SP  - 150822
DO  - 10.1016/j.apsusc.2021.150822
ER  - 

@article{
author = "Stamenković, Tijana and Bundaleski, Nenad and Barudžija, Tanja and Validžić, Ivana Lj. and Lojpur, Vesna",
year = "2021",
abstract = "X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements are used for investigating incorporation of iodine and tin into the stibnite (Sb2S3) lattice, as well as for determining surface composition and structure, respectively. The XRD analysis revealed the visible presence of a single phase, that of pure orthorhombic Sb2S3 structure. XPS survey spectra confirmed the presence of expected elements (Sb, S, Sn and I) at the surface of corresponding samples. Since the bonding identification was hindered by non-uniform charging of samples during acquiring the photoelectron spectra, a novel approach for the analysis of high resolution spectra was proposed and successfully implemented. XPS results showed that surface composition of the non-doped sample coincides with that of the bulk, while doping strongly affects surface of the samples. Sn-doped sample appears to be prone to surface oxidation. The presence of Sb2S3, Sb2O3, SnS2 and Sn(0) phases at the surface was revealed. Strong segregation of antimony was observed in the I-doped Sb2S3 sample. Iodine is also present at the surface in the form of the SbI3 phase, while the detected sulphur signal most probably corresponds to S atoms from unaltered deeper layers.",
journal = "Applied Surface Science",
title = "XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging",
volume = "567",
pages = "150822",
doi = "10.1016/j.apsusc.2021.150822"
}

Stamenković, T., Bundaleski, N., Barudžija, T., Validžić, I. Lj.,& Lojpur, V.. (2021). XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging. in Applied Surface Science, 567, 150822.
https://doi.org/10.1016/j.apsusc.2021.150822

Stamenković T, Bundaleski N, Barudžija T, Validžić IL, Lojpur V. XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging. in Applied Surface Science. 2021;567:150822.
doi:10.1016/j.apsusc.2021.150822 .

Stamenković, Tijana, Bundaleski, Nenad, Barudžija, Tanja, Validžić, Ivana Lj., Lojpur, Vesna, "XPS study of iodine and tin doped Sb2S3 nanostructures affected by non-uniform charging" in Applied Surface Science, 567 (2021):150822,
https://doi.org/10.1016/j.apsusc.2021.150822 . .

TY  - CONF
AU  - Stamenković, Tijana
AU  - Rakočević, Lazar
AU  - Barudžija, Tanja
AU  - Validžić, Ivana Lj.
AU  - Lojpur, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10810
AB  - X-ray photoelectron spectroscopy (XPS) measurements were used for analyzing the incorporation of iodine (I) and tin (Sn) into the stibnite (Sb2 S3 ) lattice obtained via the hot- injection method. The X-ray diffraction (XRD) technique revealed the visible presence of one phase, the pure orthorhombic structure of Sb 2 S3 with the Pnma group. Scanning electron microscopy (SEM) showed long columnar structures with length of few nanometers and diameter of about 150 nm.The incorporation of I and Sn into Sb 2 S3 was verified by comparing the XPS spectra of the non-doped Sb2 S3 and iodine and tin-doped samples, by the distinctive appearance of characteristic 3d peaks of iodine and tin. As well, the relative amounts of I and Sn dopants were determined from the I 3d5/2 and Sn 3d 5/2 , respectively. The obtained, lesser than expected, amount of dopants is likely due to a possible weakening of I and Sn signals. Shifting of the valence band towards higher (I-doped Sb2S3 ) or lower (Sn-doped Sb2 S3 ) energies, related to the non-doped sample, also confirmed the successful incorporation of dopant atoms in the Sb2 S3 lattice.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy
SP  - 68
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10810
ER  - 

@conference{
author = "Stamenković, Tijana and Rakočević, Lazar and Barudžija, Tanja and Validžić, Ivana Lj. and Lojpur, Vesna",
year = "2021",
abstract = "X-ray photoelectron spectroscopy (XPS) measurements were used for analyzing the incorporation of iodine (I) and tin (Sn) into the stibnite (Sb2 S3 ) lattice obtained via the hot- injection method. The X-ray diffraction (XRD) technique revealed the visible presence of one phase, the pure orthorhombic structure of Sb 2 S3 with the Pnma group. Scanning electron microscopy (SEM) showed long columnar structures with length of few nanometers and diameter of about 150 nm.The incorporation of I and Sn into Sb 2 S3 was verified by comparing the XPS spectra of the non-doped Sb2 S3 and iodine and tin-doped samples, by the distinctive appearance of characteristic 3d peaks of iodine and tin. As well, the relative amounts of I and Sn dopants were determined from the I 3d5/2 and Sn 3d 5/2 , respectively. The obtained, lesser than expected, amount of dopants is likely due to a possible weakening of I and Sn signals. Shifting of the valence band towards higher (I-doped Sb2S3 ) or lower (Sn-doped Sb2 S3 ) energies, related to the non-doped sample, also confirmed the successful incorporation of dopant atoms in the Sb2 S3 lattice.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy",
pages = "68",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10810"
}

Stamenković, T., Rakočević, L., Barudžija, T., Validžić, I. Lj.,& Lojpur, V.. (2021). Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 68.
https://hdl.handle.net/21.15107/rcub_vinar_10810

Stamenković T, Rakočević L, Barudžija T, Validžić IL, Lojpur V. Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:68.
https://hdl.handle.net/21.15107/rcub_vinar_10810 .

Stamenković, Tijana, Rakočević, Lazar, Barudžija, Tanja, Validžić, Ivana Lj., Lojpur, Vesna, "Study of iodine (n) and tin (p) doped Sb2S3 nanoparticles by detail X-ray photoelectron spectroscopy" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):68,
https://hdl.handle.net/21.15107/rcub_vinar_10810 .