Prekajski, Marija D.

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Authority KeyName Variants
orcid::0000-0002-5704-152X
  • Prekajski, Marija D. (30)
  • Prekajski-Đorđević, Marija D. (9)
Projects
Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine Magmatism and geodynamics of the Balkan Peninsula from Mesozoic to present day: significance for the formation of metallic and non-metallic mineral deposits
Fundacao de Amparo a Pesquisa do Estado de Sao Paulo-FAPESP [2010/20574-3] Physics of nanostructured oxide materials and strongly correlated systems
Simultaneous Bioremediation and Soilification of Degraded Areas to Preserve Natural Resources of Biologically Active Substances, and Development and Production of Biomaterials and Dietetic Products Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing
Lithium-ion batteries and fuel cells - research and development Magnetic and radionuclide labeled nanostructured materials for medical applications
Nanostructured multifunctional materials and nanocomposites Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion
Possibilities of use of geothermal water potential in Jablanica and Pcinja districts Development and characterization of novel biosorbent for natural and waste water treatment
Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo Laboratory for Advanced Nuclear Energy, Institute of Innovative Research, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo [212-1-N1-29, 152-8550]
Ministry of Education, Science and Technological Development of Serbia Ministry of Science of the Republic of Serbia
Qatar National Research Fund [8-028-1-001] SASA project [F-134], Swiss National Science Foundation [IZ73Z0-128169], Spanish Ministry of Science and Innovation [AIB2010SE-00160], Sectorial Operational Programme Human Resource Development (SOPHRD) [POSDRU/89/1.5/S/63700]
SCOPES [IZ73Z0_1 27961], CEEPUS [CIII-RO-0038-07-1112] Slovenian Research Agency - Slovenia [P2-0091]
Slovenian-Serbian bilateral collaboration under the project No. 06-00-118/2018-09/51: Synthesis of luminescent nanopowders of type R2MoO6:REE and their structural characterization by means of electron microscopy Tokyo Institute of Technology, Research Laboratory for Nuclear Reactors, O-okayama, Meguro-ku, Tokyo

Author's Bibliography

Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures

Stanković, Nadežda; Nikolić, Marko; Jelenković, Branislav; Daneu, Nina; Maletaškić, Jelena; Prekajski-Đorđević, Marija D.; Matović, Branko

(2020)

TY  - JOUR
AU  - Stanković, Nadežda
AU  - Nikolić, Marko
AU  - Jelenković, Branislav
AU  - Daneu, Nina
AU  - Maletaškić, Jelena
AU  - Prekajski-Đorđević, Marija D.
AU  - Matović, Branko
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9009
AB  - In the last decade, an immense progress has been made in white LEDs, mainly due to the development of red-emitting phosphors. In this paper, we report on the synthesis of Eu3+ activated Y2MoO6 by a self-initiated and self-sustained method. The obtained powder was calcined at various temperatures in the 600–1400 °C range and 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 Y2MoO6:Eu3+, with particle size in the nanorange at lower treatment temperatures (600 and 800 °C) and in the microrange at higher calcination temperatures (1000–1400 °C). The obtained powders are promising materials for white light-emitting diodes as they can efficiently absorb energy in 324–425 nm region (near-UV to blue light region) and emit at 611 nm in the red region of the spectrum, while exhibiting high thermal and chemical stability.
T2  - Processing and Application of Ceramics
T1  - Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures
VL  - 14
IS  - 1
SP  - 71
EP  - 76
DO  - 10.2298/PAC2001071S
ER  - 
@article{
author = "Stanković, Nadežda and Nikolić, Marko and Jelenković, Branislav and Daneu, Nina and Maletaškić, Jelena and Prekajski-Đorđević, Marija D. and Matović, Branko",
year = "2020",
abstract = "In the last decade, an immense progress has been made in white LEDs, mainly due to the development of red-emitting phosphors. In this paper, we report on the synthesis of Eu3+ activated Y2MoO6 by a self-initiated and self-sustained method. The obtained powder was calcined at various temperatures in the 600–1400 °C range and 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 Y2MoO6:Eu3+, with particle size in the nanorange at lower treatment temperatures (600 and 800 °C) and in the microrange at higher calcination temperatures (1000–1400 °C). The obtained powders are promising materials for white light-emitting diodes as they can efficiently absorb energy in 324–425 nm region (near-UV to blue light region) and emit at 611 nm in the red region of the spectrum, while exhibiting high thermal and chemical stability.",
journal = "Processing and Application of Ceramics",
title = "Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures",
volume = "14",
number = "1",
pages = "71-76",
doi = "10.2298/PAC2001071S"
}
Stanković, N., Nikolić, M., Jelenković, B., Daneu, N., Maletaškić, J., Prekajski-Đorđević, M. D.,& Matović, B.. (2020). Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures. in Processing and Application of Ceramics, 14(1), 71-76.
https://doi.org/10.2298/PAC2001071S
Stanković N, Nikolić M, Jelenković B, Daneu N, Maletaškić J, Prekajski-Đorđević MD, Matović B. Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures. in Processing and Application of Ceramics. 2020;14(1):71-76.
doi:10.2298/PAC2001071S .
Stanković, Nadežda, Nikolić, Marko, Jelenković, Branislav, Daneu, Nina, Maletaškić, Jelena, Prekajski-Đorđević, Marija D., Matović, Branko, "Luminescence properties of Eu3+ activated Y2MoO6 powders calcined at different temperatures" in Processing and Application of Ceramics, 14, no. 1 (2020):71-76,
https://doi.org/10.2298/PAC2001071S . .
1
1
1

Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study

Prekajski-Đorđević, Marija D.; Vukoje, Ivana D.; Lazić, Vesna M.; Đorđević, Vesna R.; Sredojević, Dušan; Dostanić, Jasmina; Lončarević, Davor; Ahrenkiel, Scott Phillip; Belić, Milivoj R.; Nedeljković, Jovan

(2019)

TY  - JOUR
AU  - Prekajski-Đorđević, Marija D.
AU  - Vukoje, Ivana D.
AU  - Lazić, Vesna M.
AU  - Đorđević, Vesna R.
AU  - Sredojević, Dušan
AU  - Dostanić, Jasmina
AU  - Lončarević, Davor
AU  - Ahrenkiel, Scott Phillip
AU  - Belić, Milivoj R.
AU  - Nedeljković, Jovan
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8387
AB  - Surface modification of CeO2 nano-powder, synthesized by a self-propagating room temperature method with salicylate-type ligands (salicylic acid and 5-aminosalicylic acid) as well as catecholate-type ligands (catechol, 3,4-dihydroxybenzoic acid, caffeic acid and 2,3-dihydroxy naphthalene), induces the appearance of absorption in the visible spectral region due to the interfacial charge transfer (ICT) complex formation. Thorough characterization involving transmission electron microscopy, XRD analysis, and nitrogen adsorption-desorption isotherms, revealed that loosely agglomerated CeO2 particles of the size ranging from 2 to 4 nm have cubic fluorite structure and specific surface area of 140 m2/g. The attachment of salicylate- and catecholate-type of ligands to the surface of CeO2 powders leads to the formation of colored powders with tunable absorption in the visible spectral region. The density functional theory calculations with properly design model systems were performed to estimate the alignment of energy levels of various inorganic/organic hybrids. A reasonably good agreement between calculated values and experimental data was found. © 2019
T2  - Materials Chemistry and Physics
T1  - Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study
VL  - 236
SP  - 121816
DO  - 10.1016/j.matchemphys.2019.121816
ER  - 
@article{
author = "Prekajski-Đorđević, Marija D. and Vukoje, Ivana D. and Lazić, Vesna M. and Đorđević, Vesna R. and Sredojević, Dušan and Dostanić, Jasmina and Lončarević, Davor and Ahrenkiel, Scott Phillip and Belić, Milivoj R. and Nedeljković, Jovan",
year = "2019",
abstract = "Surface modification of CeO2 nano-powder, synthesized by a self-propagating room temperature method with salicylate-type ligands (salicylic acid and 5-aminosalicylic acid) as well as catecholate-type ligands (catechol, 3,4-dihydroxybenzoic acid, caffeic acid and 2,3-dihydroxy naphthalene), induces the appearance of absorption in the visible spectral region due to the interfacial charge transfer (ICT) complex formation. Thorough characterization involving transmission electron microscopy, XRD analysis, and nitrogen adsorption-desorption isotherms, revealed that loosely agglomerated CeO2 particles of the size ranging from 2 to 4 nm have cubic fluorite structure and specific surface area of 140 m2/g. The attachment of salicylate- and catecholate-type of ligands to the surface of CeO2 powders leads to the formation of colored powders with tunable absorption in the visible spectral region. The density functional theory calculations with properly design model systems were performed to estimate the alignment of energy levels of various inorganic/organic hybrids. A reasonably good agreement between calculated values and experimental data was found. © 2019",
journal = "Materials Chemistry and Physics",
title = "Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study",
volume = "236",
pages = "121816",
doi = "10.1016/j.matchemphys.2019.121816"
}
Prekajski-Đorđević, M. D., Vukoje, I. D., Lazić, V. M., Đorđević, V. R., Sredojević, D., Dostanić, J., Lončarević, D., Ahrenkiel, S. P., Belić, M. R.,& Nedeljković, J.. (2019). Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study. in Materials Chemistry and Physics, 236, 121816.
https://doi.org/10.1016/j.matchemphys.2019.121816
Prekajski-Đorđević MD, Vukoje ID, Lazić VM, Đorđević VR, Sredojević D, Dostanić J, Lončarević D, Ahrenkiel SP, Belić MR, Nedeljković J. Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study. in Materials Chemistry and Physics. 2019;236:121816.
doi:10.1016/j.matchemphys.2019.121816 .
Prekajski-Đorđević, Marija D., Vukoje, Ivana D., Lazić, Vesna M., Đorđević, Vesna R., Sredojević, Dušan, Dostanić, Jasmina, Lončarević, Davor, Ahrenkiel, Scott Phillip, Belić, Milivoj R., Nedeljković, Jovan, "Electronic structure of surface complexes between CeO2 and benzene derivatives: A comparative experimental and DFT study" in Materials Chemistry and Physics, 236 (2019):121816,
https://doi.org/10.1016/j.matchemphys.2019.121816 . .
3
1
3

Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia

Todorović, Bratislav Ž.; Stojiljković, Dragan T.; Pantić-Petrović, Tanja; Matović, Branko; Prekajski-Đorđević, Marija D.; Petrović, Sanja M.; Stojiljković, Milena S.; Stevanović, Miloš M.

(2019)

TY  - JOUR
AU  - Todorović, Bratislav Ž.
AU  - Stojiljković, Dragan T.
AU  - Pantić-Petrović, Tanja
AU  - Matović, Branko
AU  - Prekajski-Đorđević, Marija D.
AU  - Petrović, Sanja M.
AU  - Stojiljković, Milena S.
AU  - Stevanović, Miloš M.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8493
AB  - There are no available data about direct burkeite formation on the geothermal waters pipelines in Europe. Data about accompanying minerals of burkeite are also scarce. This mineral has been found in the scale on pipelines of VG-2 and VG-3 boreholes at Vranjska Banja, Serbia. Geothermal waters from these boreholes have temperatures in the range of 103 and 105 °C which classifies them to the warmest waters in the continental Europe. Based on physicochemical and geochemical data, VG-2 and VG-3 geothermal waters can be classified as Na–Alk–SO4Cl type of waters. According to their temperatures, total hardness and pH values, these waters belong to hyperthermal, very soft and moderately alkaline. Calculated LSI (0.4 and 1.7) and RSI (6.5 and 4.8) values indicate their scale formation tendency. Results of the spectrometric scale examination from the pipe deposits provide a clear qualitative and quantitative burkeite characterization with its accompanying minerals. FTIR analysis points to the presence of carbonate (1766, 1458, 877 and 705 cm−1) and sulfate bands (1139, 1116 and 617 cm−1). Apart from the qualitative analysis, XRD also shows the burkeite mass part in the scale. VG-2 geothermal water contains about 50% of burkeite, which is associated with trona mineral (40%) and smaller amount of halite of about 10%. Burkeite is a dominant phase (> 60%) in VG-3 water, with the presence of a significant halite quantity (> 35%) and a minor calcite quantity (2%). © 2019, International Association for Mathematical Geosciences.
T2  - Natural Resources Research
T1  - Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia
VL  - 28
IS  - 4
SP  - 1259
EP  - 1267
DO  - 10.1007/s11053-019-09455-y
ER  - 
@article{
author = "Todorović, Bratislav Ž. and Stojiljković, Dragan T. and Pantić-Petrović, Tanja and Matović, Branko and Prekajski-Đorđević, Marija D. and Petrović, Sanja M. and Stojiljković, Milena S. and Stevanović, Miloš M.",
year = "2019",
abstract = "There are no available data about direct burkeite formation on the geothermal waters pipelines in Europe. Data about accompanying minerals of burkeite are also scarce. This mineral has been found in the scale on pipelines of VG-2 and VG-3 boreholes at Vranjska Banja, Serbia. Geothermal waters from these boreholes have temperatures in the range of 103 and 105 °C which classifies them to the warmest waters in the continental Europe. Based on physicochemical and geochemical data, VG-2 and VG-3 geothermal waters can be classified as Na–Alk–SO4Cl type of waters. According to their temperatures, total hardness and pH values, these waters belong to hyperthermal, very soft and moderately alkaline. Calculated LSI (0.4 and 1.7) and RSI (6.5 and 4.8) values indicate their scale formation tendency. Results of the spectrometric scale examination from the pipe deposits provide a clear qualitative and quantitative burkeite characterization with its accompanying minerals. FTIR analysis points to the presence of carbonate (1766, 1458, 877 and 705 cm−1) and sulfate bands (1139, 1116 and 617 cm−1). Apart from the qualitative analysis, XRD also shows the burkeite mass part in the scale. VG-2 geothermal water contains about 50% of burkeite, which is associated with trona mineral (40%) and smaller amount of halite of about 10%. Burkeite is a dominant phase (> 60%) in VG-3 water, with the presence of a significant halite quantity (> 35%) and a minor calcite quantity (2%). © 2019, International Association for Mathematical Geosciences.",
journal = "Natural Resources Research",
title = "Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia",
volume = "28",
number = "4",
pages = "1259-1267",
doi = "10.1007/s11053-019-09455-y"
}
Todorović, B. Ž., Stojiljković, D. T., Pantić-Petrović, T., Matović, B., Prekajski-Đorđević, M. D., Petrović, S. M., Stojiljković, M. S.,& Stevanović, M. M.. (2019). Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia. in Natural Resources Research, 28(4), 1259-1267.
https://doi.org/10.1007/s11053-019-09455-y
Todorović BŽ, Stojiljković DT, Pantić-Petrović T, Matović B, Prekajski-Đorđević MD, Petrović SM, Stojiljković MS, Stevanović MM. Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia. in Natural Resources Research. 2019;28(4):1259-1267.
doi:10.1007/s11053-019-09455-y .
Todorović, Bratislav Ž., Stojiljković, Dragan T., Pantić-Petrović, Tanja, Matović, Branko, Prekajski-Đorđević, Marija D., Petrović, Sanja M., Stojiljković, Milena S., Stevanović, Miloš M., "Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia" in Natural Resources Research, 28, no. 4 (2019):1259-1267,
https://doi.org/10.1007/s11053-019-09455-y . .
1

Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles

Maletaškić, Jelena; Čebela, Maria; Prekajski-Đorđević, Marija D.; Kozlenko, Denis; Kichanov, Sergey; Mitrić, Miodrag; Matović, Branko

(2019)

TY  - JOUR
AU  - Maletaškić, Jelena
AU  - Čebela, Maria
AU  - Prekajski-Đorđević, Marija D.
AU  - Kozlenko, Denis
AU  - Kichanov, Sergey
AU  - Mitrić, Miodrag
AU  - Matović, Branko
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8429
AB  - Bismuth ferrite (BiFeO3) was synthesized by hydrothermal method. The crystal and magnetic structures of BiFeO3 have been studied by means of X-ray diffraction and neutron powder diffraction at ambient temperature. Microstructure was analysed by scanning electron microscopy. Quantitative phase analysis by the Rietveld method was conducted and crystallite sizes of 27 nm were determined from the XRD line broadening. The magnetic structure of BiFeO3 is described by the G-type antiferromagnetic order with magnetic peak located at 4.6 Å and a noticeable magnetic contribution to a reflection located at 2.4 Å in the diffraction pattern. The values of the ordered magnetic moment of Fe ions μFe=3.8(1) μB, obtained at ambient conditions, are consistent with those determined earlier. The magnetic moments in the crystal plane z = const are arranged in parallel, changing the direction from [100] to [ 110 ] when moving from one to the other z = const plane. © 2018 Authors. Published by the International Institute for the Science of Sintering.
T2  - Science of Sintering
T1  - Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles
VL  - 51
IS  - 1
SP  - 71
EP  - 79
DO  - 10.2298/SOS1901071M
ER  - 
@article{
author = "Maletaškić, Jelena and Čebela, Maria and Prekajski-Đorđević, Marija D. and Kozlenko, Denis and Kichanov, Sergey and Mitrić, Miodrag and Matović, Branko",
year = "2019",
abstract = "Bismuth ferrite (BiFeO3) was synthesized by hydrothermal method. The crystal and magnetic structures of BiFeO3 have been studied by means of X-ray diffraction and neutron powder diffraction at ambient temperature. Microstructure was analysed by scanning electron microscopy. Quantitative phase analysis by the Rietveld method was conducted and crystallite sizes of 27 nm were determined from the XRD line broadening. The magnetic structure of BiFeO3 is described by the G-type antiferromagnetic order with magnetic peak located at 4.6 Å and a noticeable magnetic contribution to a reflection located at 2.4 Å in the diffraction pattern. The values of the ordered magnetic moment of Fe ions μFe=3.8(1) μB, obtained at ambient conditions, are consistent with those determined earlier. The magnetic moments in the crystal plane z = const are arranged in parallel, changing the direction from [100] to [ 110 ] when moving from one to the other z = const plane. © 2018 Authors. Published by the International Institute for the Science of Sintering.",
journal = "Science of Sintering",
title = "Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles",
volume = "51",
number = "1",
pages = "71-79",
doi = "10.2298/SOS1901071M"
}
Maletaškić, J., Čebela, M., Prekajski-Đorđević, M. D., Kozlenko, D., Kichanov, S., Mitrić, M.,& Matović, B.. (2019). Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles. in Science of Sintering, 51(1), 71-79.
https://doi.org/10.2298/SOS1901071M
Maletaškić J, Čebela M, Prekajski-Đorđević MD, Kozlenko D, Kichanov S, Mitrić M, Matović B. Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles. in Science of Sintering. 2019;51(1):71-79.
doi:10.2298/SOS1901071M .
Maletaškić, Jelena, Čebela, Maria, Prekajski-Đorđević, Marija D., Kozlenko, Denis, Kichanov, Sergey, Mitrić, Miodrag, Matović, Branko, "Combined magnetic and structural characterization of hidrothermal bismuth ferrite (BiFeO3) nanoparticles" in Science of Sintering, 51, no. 1 (2019):71-79,
https://doi.org/10.2298/SOS1901071M . .
1
1

Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers

Dmitrović, Svetlana; Prekajski-Đorđević, Marija D.; Jokić, Bojan M.; Branković, Goran O.; Zarubica, Aleksandra R.; Žikić, Vladimir; Matović, Branko

(2018)

TY  - JOUR
AU  - Dmitrović, Svetlana
AU  - Prekajski-Đorđević, Marija D.
AU  - Jokić, Bojan M.
AU  - Branković, Goran O.
AU  - Zarubica, Aleksandra R.
AU  - Žikić, Vladimir
AU  - Matović, Branko
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7616
AB  - Spider silk fibers, collected from Pholcus Phalangioides spider were used as a template for obtaining magnesium oxide (MgO, periclase) as well as magnesium hydroxide (Mg(OH)2, brucite) fibers. Magnesium oxide fibers were obtained in a simple manner by heat induced decomposition of magnesium salt (MgCl2) in the presence of the spider silk fibers, while magnesium hydroxidefibers were synthesized by hydration of MgO fibers at 50 °C, 70°C and 90 °C, for 48 and 96 h. According to Scanning electron microscopy (SEM), dimensions of spider silk fibers determined the dimension of synthesized MgO fibers, while for Mg(OH)2 fibers, the average diameter was increased with prolonging the hydration period. The surface of Mg(OH)2 fibers was noticed to be covered with brucite in a form of plates. X-ray diffraction (XRD) analysis showed that MgO fibers were single-phased (the pure magnesium oxide fibers were obtained), while Mg(OH)2 fibers were two- or single-phased brucite depending on incubation period, and/or incubation temperature.
AB  - Vlakna paukove mreže sakupljena od Pholcus phalangioides pauka korišćena su kao matrica za dobijanje vlakana magnezijum oksida (MgO, periklas) i magnezijum-hidroksida (Mg(OH)2, brucit). Vlakna magnezijum oksida jednostavno su dobijena termičkim razlaganjem soli magnezijuma (MgCl2) u prisustvu vlakana paukove mreže, dok su vlakna magnezijum hidroksida sintetisana hidratacijom MgO vlakana na temperaturama: 50, 70 i 90 °C u trajanju od 48 i 96 h. Na osnovu
rezultata skenirajuće elektronske mikroskopije (SEM), veličina sintetisanih MgO vlakana bila je određena dimenzijama vlakana pauka, dok je za Mg(OH)2 vlakna prosečan dijametar rastao sa produženjem perioda hidratacije. Na površini Mg(OH)2 vlakana uočeni su tabličasti kristali brucita. Difrakcija X zraka (XRD) pokazala je da su vlakna periklasa jednofazna (dobijen je čist magnezijum-oksid), dok su brucitna vlakna bila dvofazna ili jednofazna, u zavisnosti od inkubacionog perioda i/ili teperature na kojoj je vršena inkubacija.
T2  - Hemijska industrija
T1  - Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers
T1  - Sinteza vlakana magnezijum-oksida i magnezijum-hidroksida korišćenjem paukove mreže kao matrice
VL  - 72
IS  - 1
SP  - 23
EP  - 28
DO  - 10.2298/HEMIND170404018D
ER  - 
@article{
author = "Dmitrović, Svetlana and Prekajski-Đorđević, Marija D. and Jokić, Bojan M. and Branković, Goran O. and Zarubica, Aleksandra R. and Žikić, Vladimir and Matović, Branko",
year = "2018",
abstract = "Spider silk fibers, collected from Pholcus Phalangioides spider were used as a template for obtaining magnesium oxide (MgO, periclase) as well as magnesium hydroxide (Mg(OH)2, brucite) fibers. Magnesium oxide fibers were obtained in a simple manner by heat induced decomposition of magnesium salt (MgCl2) in the presence of the spider silk fibers, while magnesium hydroxidefibers were synthesized by hydration of MgO fibers at 50 °C, 70°C and 90 °C, for 48 and 96 h. According to Scanning electron microscopy (SEM), dimensions of spider silk fibers determined the dimension of synthesized MgO fibers, while for Mg(OH)2 fibers, the average diameter was increased with prolonging the hydration period. The surface of Mg(OH)2 fibers was noticed to be covered with brucite in a form of plates. X-ray diffraction (XRD) analysis showed that MgO fibers were single-phased (the pure magnesium oxide fibers were obtained), while Mg(OH)2 fibers were two- or single-phased brucite depending on incubation period, and/or incubation temperature., Vlakna paukove mreže sakupljena od Pholcus phalangioides pauka korišćena su kao matrica za dobijanje vlakana magnezijum oksida (MgO, periklas) i magnezijum-hidroksida (Mg(OH)2, brucit). Vlakna magnezijum oksida jednostavno su dobijena termičkim razlaganjem soli magnezijuma (MgCl2) u prisustvu vlakana paukove mreže, dok su vlakna magnezijum hidroksida sintetisana hidratacijom MgO vlakana na temperaturama: 50, 70 i 90 °C u trajanju od 48 i 96 h. Na osnovu
rezultata skenirajuće elektronske mikroskopije (SEM), veličina sintetisanih MgO vlakana bila je određena dimenzijama vlakana pauka, dok je za Mg(OH)2 vlakna prosečan dijametar rastao sa produženjem perioda hidratacije. Na površini Mg(OH)2 vlakana uočeni su tabličasti kristali brucita. Difrakcija X zraka (XRD) pokazala je da su vlakna periklasa jednofazna (dobijen je čist magnezijum-oksid), dok su brucitna vlakna bila dvofazna ili jednofazna, u zavisnosti od inkubacionog perioda i/ili teperature na kojoj je vršena inkubacija.",
journal = "Hemijska industrija",
title = "Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers, Sinteza vlakana magnezijum-oksida i magnezijum-hidroksida korišćenjem paukove mreže kao matrice",
volume = "72",
number = "1",
pages = "23-28",
doi = "10.2298/HEMIND170404018D"
}
Dmitrović, S., Prekajski-Đorđević, M. D., Jokić, B. M., Branković, G. O., Zarubica, A. R., Žikić, V.,& Matović, B.. (2018). Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers. in Hemijska industrija, 72(1), 23-28.
https://doi.org/10.2298/HEMIND170404018D
Dmitrović S, Prekajski-Đorđević MD, Jokić BM, Branković GO, Zarubica AR, Žikić V, Matović B. Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers. in Hemijska industrija. 2018;72(1):23-28.
doi:10.2298/HEMIND170404018D .
Dmitrović, Svetlana, Prekajski-Đorđević, Marija D., Jokić, Bojan M., Branković, Goran O., Zarubica, Aleksandra R., Žikić, Vladimir, Matović, Branko, "Spider silk as a template for obtaining magnesium oxide and magnesium hydroxide fibers" in Hemijska industrija, 72, no. 1 (2018):23-28,
https://doi.org/10.2298/HEMIND170404018D . .

Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating

Milenković, Ivana; Radotić, Ksenija; Matović, Branko; Prekajski, Marija D.; Živković, Ljiljana; Jakovljević, Dragica; Gojgić-Cvijović, Gordana; Beškoski, Vladimir P.

(2018)

TY  - JOUR
AU  - Milenković, Ivana
AU  - Radotić, Ksenija
AU  - Matović, Branko
AU  - Prekajski, Marija D.
AU  - Živković, Ljiljana
AU  - Jakovljević, Dragica
AU  - Gojgić-Cvijović, Gordana
AU  - Beškoski, Vladimir P.
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0352-51391800031M
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7764
AB  - Cerium oxide (CeO2) nanoparticles (CONPs) are interesting biomaterials with various applications in biomedicine, cosmetics and the pharmaceutical industry, but with limited practical application because of their low stability in aqueous media. The aim of this study was to obtain CONPs with increased stability by coating the particles. Microbial exopolysaccharides (levan, pullulan) and glucose were used to prepare CONPs under different synthesis conditions. Coating was attempted by adding the carbohydrates during (direct coating) or after (subsequent coating) the synthesis of CONPs. The obtained nanoparticles were characterized by X-Ray diffraction analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The suspension stability of the uncoated and coated CONPs in aqueous media was evaluated by measuring the hydrodynamic size, zeta potential and turbidity. The FT-IR spectra revealed the differences between coated CONPs and showed the success of subsequent coating with carbohydrates. Coating with carbohydrates improved the stability the CONP suspension by decreasing the size of aggregated particles. The suspensions of levan- and glucose-coated CONPs had the best stability. In this study, CONPs were prepared using non-toxic materials, which were completely environmentally friendly. The obtained results open new horizons for CONP synthesis, improving their biological applications.
T2  - Journal of the Serbian Chemical Society
T1  - Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating
VL  - 83
IS  - 6
SP  - 745
EP  - 757
DO  - 10.2298/JSC171205031M
ER  - 
@article{
author = "Milenković, Ivana and Radotić, Ksenija and Matović, Branko and Prekajski, Marija D. and Živković, Ljiljana and Jakovljević, Dragica and Gojgić-Cvijović, Gordana and Beškoski, Vladimir P.",
year = "2018",
abstract = "Cerium oxide (CeO2) nanoparticles (CONPs) are interesting biomaterials with various applications in biomedicine, cosmetics and the pharmaceutical industry, but with limited practical application because of their low stability in aqueous media. The aim of this study was to obtain CONPs with increased stability by coating the particles. Microbial exopolysaccharides (levan, pullulan) and glucose were used to prepare CONPs under different synthesis conditions. Coating was attempted by adding the carbohydrates during (direct coating) or after (subsequent coating) the synthesis of CONPs. The obtained nanoparticles were characterized by X-Ray diffraction analysis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The suspension stability of the uncoated and coated CONPs in aqueous media was evaluated by measuring the hydrodynamic size, zeta potential and turbidity. The FT-IR spectra revealed the differences between coated CONPs and showed the success of subsequent coating with carbohydrates. Coating with carbohydrates improved the stability the CONP suspension by decreasing the size of aggregated particles. The suspensions of levan- and glucose-coated CONPs had the best stability. In this study, CONPs were prepared using non-toxic materials, which were completely environmentally friendly. The obtained results open new horizons for CONP synthesis, improving their biological applications.",
journal = "Journal of the Serbian Chemical Society",
title = "Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating",
volume = "83",
number = "6",
pages = "745-757",
doi = "10.2298/JSC171205031M"
}
Milenković, I., Radotić, K., Matović, B., Prekajski, M. D., Živković, L., Jakovljević, D., Gojgić-Cvijović, G.,& Beškoski, V. P.. (2018). Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating. in Journal of the Serbian Chemical Society, 83(6), 745-757.
https://doi.org/10.2298/JSC171205031M
Milenković I, Radotić K, Matović B, Prekajski MD, Živković L, Jakovljević D, Gojgić-Cvijović G, Beškoski VP. Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating. in Journal of the Serbian Chemical Society. 2018;83(6):745-757.
doi:10.2298/JSC171205031M .
Milenković, Ivana, Radotić, Ksenija, Matović, Branko, Prekajski, Marija D., Živković, Ljiljana, Jakovljević, Dragica, Gojgić-Cvijović, Gordana, Beškoski, Vladimir P., "Improving stability of cerium oxide nanoparticles by microbial polysaccharides coating" in Journal of the Serbian Chemical Society, 83, no. 6 (2018):745-757,
https://doi.org/10.2298/JSC171205031M . .
9
9
9

A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance

Najdanović, Slobodan M.; Petrović, Milica M.; Slipper, Ian J.; Kostić, Miloš M.; Prekajski, Marija D.; Mitrović, Jelena Z.; Bojić, Aleksandar Lj.

(2018)

TY  - JOUR
AU  - Najdanović, Slobodan M.
AU  - Petrović, Milica M.
AU  - Slipper, Ian J.
AU  - Kostić, Miloš M.
AU  - Prekajski, Marija D.
AU  - Mitrović, Jelena Z.
AU  - Bojić, Aleksandar Lj.
PY  - 2018
UR  - http://www.ingentaconnect.com/content/10.2175/106143017X15131012152924
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7869
AB  - A new photocatalyst bismuth oxo citrate was synthesized by facile precipitation process with calcination at 200 8C. The photocatalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fouriertransform infrared (FTIR) spectroscopy, N2 sorptometry, and elemental analysis. Morphologically, it is composed of polyhedral particles with different, irregular shapes and sizes. The specific surface area (SSA) of the photocatalyst was 8.92 m2 g-1. It showed very good photocatalytic performance and reusability. Total decolorization of Reactive Blue 19 (RB19) was achieved in less than 10 minutes, which is much faster in comparison with TiO2 P25. Also, bismuth oxo citrate showed higher photocatalytic activity than other photocatalysts based on bismuth compounds reported by other authors. Optimal photocatalysis parameters were pH 2 and photocatalyst dose of 250 mg dm-3. The decolorization rate was found to decrease as initial dye concentration increased. The photocatalytic data best fitted to L-H kinetic model with pseudo-first order reaction rate. Chrastil diffusion model showed that diffusion has not influence on the process. Water Environ. Res., 90, 719 (2018). © 2018 Water Environment Federation.
T2  - Water Environment Research
T1  - A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance
VL  - 90
IS  - 8
SP  - 719
EP  - 728
DO  - 10.2175/106143017X15131012152924
ER  - 
@article{
author = "Najdanović, Slobodan M. and Petrović, Milica M. and Slipper, Ian J. and Kostić, Miloš M. and Prekajski, Marija D. and Mitrović, Jelena Z. and Bojić, Aleksandar Lj.",
year = "2018",
abstract = "A new photocatalyst bismuth oxo citrate was synthesized by facile precipitation process with calcination at 200 8C. The photocatalyst was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fouriertransform infrared (FTIR) spectroscopy, N2 sorptometry, and elemental analysis. Morphologically, it is composed of polyhedral particles with different, irregular shapes and sizes. The specific surface area (SSA) of the photocatalyst was 8.92 m2 g-1. It showed very good photocatalytic performance and reusability. Total decolorization of Reactive Blue 19 (RB19) was achieved in less than 10 minutes, which is much faster in comparison with TiO2 P25. Also, bismuth oxo citrate showed higher photocatalytic activity than other photocatalysts based on bismuth compounds reported by other authors. Optimal photocatalysis parameters were pH 2 and photocatalyst dose of 250 mg dm-3. The decolorization rate was found to decrease as initial dye concentration increased. The photocatalytic data best fitted to L-H kinetic model with pseudo-first order reaction rate. Chrastil diffusion model showed that diffusion has not influence on the process. Water Environ. Res., 90, 719 (2018). © 2018 Water Environment Federation.",
journal = "Water Environment Research",
title = "A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance",
volume = "90",
number = "8",
pages = "719-728",
doi = "10.2175/106143017X15131012152924"
}
Najdanović, S. M., Petrović, M. M., Slipper, I. J., Kostić, M. M., Prekajski, M. D., Mitrović, J. Z.,& Bojić, A. Lj.. (2018). A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance. in Water Environment Research, 90(8), 719-728.
https://doi.org/10.2175/106143017X15131012152924
Najdanović SM, Petrović MM, Slipper IJ, Kostić MM, Prekajski MD, Mitrović JZ, Bojić AL. A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance. in Water Environment Research. 2018;90(8):719-728.
doi:10.2175/106143017X15131012152924 .
Najdanović, Slobodan M., Petrović, Milica M., Slipper, Ian J., Kostić, Miloš M., Prekajski, Marija D., Mitrović, Jelena Z., Bojić, Aleksandar Lj., "A New Photocatalyst Bismuth Oxo Citrate: Synthesis, Characterization, and Photocatalytic Performance" in Water Environment Research, 90, no. 8 (2018):719-728,
https://doi.org/10.2175/106143017X15131012152924 . .
1
2
2
2

In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite

Prekajski-Đorđević, Marija D.; Maletaškić, Jelena; Stanković, Nadežda; Babić, Biljana M.; Yoshida, Katsumi; Yano, Toyohiko; Matović, Branko

(2018)

TY  - JOUR
AU  - Prekajski-Đorđević, Marija D.
AU  - Maletaškić, Jelena
AU  - Stanković, Nadežda
AU  - Babić, Biljana M.
AU  - Yoshida, Katsumi
AU  - Yano, Toyohiko
AU  - Matović, Branko
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1874
AB  - Hydroxyapatite was used as the inert matrix for in-situ immobilization of strontium (Sr) radioactive isotopes at room temperature. A nano-emulsification method was applied to synthesize Sr-substituted calcium hydroxyapatite (Ca1-xSrx)PO4)(6)(OH)(2). The concentration of incorporated Sr was in the range of 0 LT = x LT = 1. Immobilization of Sr was evaluated using a stable isotope instead of radioactive isotope. The effect of strontium concentration on the crystal structure was studied and the results have showed that in the whole concentration range, Sr forms solid solutions with the host hydroxyapatite crystal structure. Powders comprised of nanometre sized particles were obtained and their properties, such as crystallite and particle size, changes in lattice parameters as function of dopant content and thermal stability, were further examined. It was found that the crystal structure of obtained powders is thermally stable at high temperatures. No secondary phases were formed in as-prepared powders or during calcination. The results in this study showed that nano-emulsion strategy provides a simple pathway for synthesis of a single-phase Sr-substituted hydroxyapatite, which can be used for immobilization of Sr radioactive isotopes.
T2  - Ceramics International
T1  - In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite
VL  - 44
IS  - 2
SP  - 1771
EP  - 1777
DO  - 10.1016/j.ceramint.2017.10.110
ER  - 
@article{
author = "Prekajski-Đorđević, Marija D. and Maletaškić, Jelena and Stanković, Nadežda and Babić, Biljana M. and Yoshida, Katsumi and Yano, Toyohiko and Matović, Branko",
year = "2018",
abstract = "Hydroxyapatite was used as the inert matrix for in-situ immobilization of strontium (Sr) radioactive isotopes at room temperature. A nano-emulsification method was applied to synthesize Sr-substituted calcium hydroxyapatite (Ca1-xSrx)PO4)(6)(OH)(2). The concentration of incorporated Sr was in the range of 0 LT = x LT = 1. Immobilization of Sr was evaluated using a stable isotope instead of radioactive isotope. The effect of strontium concentration on the crystal structure was studied and the results have showed that in the whole concentration range, Sr forms solid solutions with the host hydroxyapatite crystal structure. Powders comprised of nanometre sized particles were obtained and their properties, such as crystallite and particle size, changes in lattice parameters as function of dopant content and thermal stability, were further examined. It was found that the crystal structure of obtained powders is thermally stable at high temperatures. No secondary phases were formed in as-prepared powders or during calcination. The results in this study showed that nano-emulsion strategy provides a simple pathway for synthesis of a single-phase Sr-substituted hydroxyapatite, which can be used for immobilization of Sr radioactive isotopes.",
journal = "Ceramics International",
title = "In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite",
volume = "44",
number = "2",
pages = "1771-1777",
doi = "10.1016/j.ceramint.2017.10.110"
}
Prekajski-Đorđević, M. D., Maletaškić, J., Stanković, N., Babić, B. M., Yoshida, K., Yano, T.,& Matović, B.. (2018). In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite. in Ceramics International, 44(2), 1771-1777.
https://doi.org/10.1016/j.ceramint.2017.10.110
Prekajski-Đorđević MD, Maletaškić J, Stanković N, Babić BM, Yoshida K, Yano T, Matović B. In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite. in Ceramics International. 2018;44(2):1771-1777.
doi:10.1016/j.ceramint.2017.10.110 .
Prekajski-Đorđević, Marija D., Maletaškić, Jelena, Stanković, Nadežda, Babić, Biljana M., Yoshida, Katsumi, Yano, Toyohiko, Matović, Branko, "In-situ immobilization of Sr radioactive isotope using nanocrystalline hydroxyapatite" in Ceramics International, 44, no. 2 (2018):1771-1777,
https://doi.org/10.1016/j.ceramint.2017.10.110 . .
9
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10

Photoluminescent properties of spider silk coated with Eu-doped nanoceria

Dmitrović, Svetlana; Nikolic, Marko G.; Jelenković, Branislav; Prekajski, Marija D.; Rabasović, Mihailo D.; Zarubica, Aleksandra R.; Branković, Goran O.; Matović, Branko

(2017)

TY  - JOUR
AU  - Dmitrović, Svetlana
AU  - Nikolic, Marko G.
AU  - Jelenković, Branislav
AU  - Prekajski, Marija D.
AU  - Rabasović, Mihailo D.
AU  - Zarubica, Aleksandra R.
AU  - Branković, Goran O.
AU  - Matović, Branko
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1768
AB  - Spider dragline silk was coated with pure as well as Eu-doped ceria nanopowders at the room temperature. The treatment was done by immersion of the spider silkmesh into aqueous solutions of cerium nitrate (Ce(NO3)(3)) and ammonium hydroxide (NH4OH). Depending on the relationship between Ce3+ ion and ammonium hydroxide concentration, coated fibers exhibited a different thickness. Obtained materials were studied by means of FESEM. It was found that ceria nanoparticles of average size of 3 nm were coated along spider thread. X-ray diffraction (XRD) and selected-area electron diffraction (SAED) confirmed crystal nature of nanoparticle coating of spider silk. By using Williamson-Hall plots, crystallite size and strain were estimated. EDS measurement confirmed the presence of Eu in spider-Eu-doped ceria composite, and according to FTIR analysis, the interaction between CeO2 and spider silk was proposed. The morphology of obtained composite was observed by TEM. The photoluminescence emission spectra of spider silk coated with Eu-doped ceria were measured with two different excitations of 385 and 466 nm. The two-photon excited auto-fluorescence of spider silk coated with Eu-doped ceria was detected using a nonlinear laser scanning microscope. Obtained composite has a potential as a fluorescent labeling material in diverse applications.
T2  - Journal of Nanoparticle Research
T1  - Photoluminescent properties of spider silk coated with Eu-doped nanoceria
VL  - 19
IS  - 2
DO  - 10.1007/s11051-017-3750-9
ER  - 
@article{
author = "Dmitrović, Svetlana and Nikolic, Marko G. and Jelenković, Branislav and Prekajski, Marija D. and Rabasović, Mihailo D. and Zarubica, Aleksandra R. and Branković, Goran O. and Matović, Branko",
year = "2017",
abstract = "Spider dragline silk was coated with pure as well as Eu-doped ceria nanopowders at the room temperature. The treatment was done by immersion of the spider silkmesh into aqueous solutions of cerium nitrate (Ce(NO3)(3)) and ammonium hydroxide (NH4OH). Depending on the relationship between Ce3+ ion and ammonium hydroxide concentration, coated fibers exhibited a different thickness. Obtained materials were studied by means of FESEM. It was found that ceria nanoparticles of average size of 3 nm were coated along spider thread. X-ray diffraction (XRD) and selected-area electron diffraction (SAED) confirmed crystal nature of nanoparticle coating of spider silk. By using Williamson-Hall plots, crystallite size and strain were estimated. EDS measurement confirmed the presence of Eu in spider-Eu-doped ceria composite, and according to FTIR analysis, the interaction between CeO2 and spider silk was proposed. The morphology of obtained composite was observed by TEM. The photoluminescence emission spectra of spider silk coated with Eu-doped ceria were measured with two different excitations of 385 and 466 nm. The two-photon excited auto-fluorescence of spider silk coated with Eu-doped ceria was detected using a nonlinear laser scanning microscope. Obtained composite has a potential as a fluorescent labeling material in diverse applications.",
journal = "Journal of Nanoparticle Research",
title = "Photoluminescent properties of spider silk coated with Eu-doped nanoceria",
volume = "19",
number = "2",
doi = "10.1007/s11051-017-3750-9"
}
Dmitrović, S., Nikolic, M. G., Jelenković, B., Prekajski, M. D., Rabasović, M. D., Zarubica, A. R., Branković, G. O.,& Matović, B.. (2017). Photoluminescent properties of spider silk coated with Eu-doped nanoceria. in Journal of Nanoparticle Research, 19(2).
https://doi.org/10.1007/s11051-017-3750-9
Dmitrović S, Nikolic MG, Jelenković B, Prekajski MD, Rabasović MD, Zarubica AR, Branković GO, Matović B. Photoluminescent properties of spider silk coated with Eu-doped nanoceria. in Journal of Nanoparticle Research. 2017;19(2).
doi:10.1007/s11051-017-3750-9 .
Dmitrović, Svetlana, Nikolic, Marko G., Jelenković, Branislav, Prekajski, Marija D., Rabasović, Mihailo D., Zarubica, Aleksandra R., Branković, Goran O., Matović, Branko, "Photoluminescent properties of spider silk coated with Eu-doped nanoceria" in Journal of Nanoparticle Research, 19, no. 2 (2017),
https://doi.org/10.1007/s11051-017-3750-9 . .
1
1
1

Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination

Matović, Branko; Maletaškić, Jelena; Prekajski-Đorđević, Marija D.; Maksimović, Vesna; Zagorac, Jelena B.; Yoshida, Katsumi; Yano, Toyohiko

(2017)

TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Prekajski-Đorđević, Marija D.
AU  - Maksimović, Vesna
AU  - Zagorac, Jelena B.
AU  - Yoshida, Katsumi
AU  - Yano, Toyohiko
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1541
AB  - Nanometric-sized gadolinia (Gd2O3) powders were obtained by applying solid-state displacement reaction at room temperature and low temperature calcination. The XRD analysis revealed that the room temperature product was gadolinium hydroxide, Gd(OH)(3). In order to induce crystallization of Gd2O3, the subsequent calcination at 600 similar to 1200 degrees C of the room temperature reaction products was studied. Calculation of average crystallite size (D) as well as separation of the effect of crystallite size and strain of nanocrystals was performed on the basic of Williamson-Hall plots. The morphologies of powders calcined at different temperatures were followed by scanning electron microscopy. The pure cubic Gd2O3 phase was made at 600 degrees C which converted to monoclinic Gd2O3 phase between 1400 and 1600 degrees C. High density (96% of theoretical density) ceramic pellet free of any additives was obtained after pressureless sintering at 1600 degrees C for 4 h in air, using calcined powder at 600 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Journal of the European Ceramic Society
T1  - Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination
VL  - 37
IS  - 8
SP  - 2843
EP  - 2848
DO  - 10.1016/j.jeurceramsoc.2017.03.004
ER  - 
@article{
author = "Matović, Branko and Maletaškić, Jelena and Prekajski-Đorđević, Marija D. and Maksimović, Vesna and Zagorac, Jelena B. and Yoshida, Katsumi and Yano, Toyohiko",
year = "2017",
abstract = "Nanometric-sized gadolinia (Gd2O3) powders were obtained by applying solid-state displacement reaction at room temperature and low temperature calcination. The XRD analysis revealed that the room temperature product was gadolinium hydroxide, Gd(OH)(3). In order to induce crystallization of Gd2O3, the subsequent calcination at 600 similar to 1200 degrees C of the room temperature reaction products was studied. Calculation of average crystallite size (D) as well as separation of the effect of crystallite size and strain of nanocrystals was performed on the basic of Williamson-Hall plots. The morphologies of powders calcined at different temperatures were followed by scanning electron microscopy. The pure cubic Gd2O3 phase was made at 600 degrees C which converted to monoclinic Gd2O3 phase between 1400 and 1600 degrees C. High density (96% of theoretical density) ceramic pellet free of any additives was obtained after pressureless sintering at 1600 degrees C for 4 h in air, using calcined powder at 600 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Journal of the European Ceramic Society",
title = "Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination",
volume = "37",
number = "8",
pages = "2843-2848",
doi = "10.1016/j.jeurceramsoc.2017.03.004"
}
Matović, B., Maletaškić, J., Prekajski-Đorđević, M. D., Maksimović, V., Zagorac, J. B., Yoshida, K.,& Yano, T.. (2017). Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination. in Journal of the European Ceramic Society, 37(8), 2843-2848.
https://doi.org/10.1016/j.jeurceramsoc.2017.03.004
Matović B, Maletaškić J, Prekajski-Đorđević MD, Maksimović V, Zagorac JB, Yoshida K, Yano T. Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination. in Journal of the European Ceramic Society. 2017;37(8):2843-2848.
doi:10.1016/j.jeurceramsoc.2017.03.004 .
Matović, Branko, Maletaškić, Jelena, Prekajski-Đorđević, Marija D., Maksimović, Vesna, Zagorac, Jelena B., Yoshida, Katsumi, Yano, Toyohiko, "Synthesis and characterization of nanometric gadolinia powders by room temperature solid-state displacement reaction and low temperature calcination" in Journal of the European Ceramic Society, 37, no. 8 (2017):2843-2848,
https://doi.org/10.1016/j.jeurceramsoc.2017.03.004 . .
4
4
4

Synthesis and characterization of spider silk calcite composite

Dmitrović, Svetlana; Jokić, Bojan M.; Prekajski, Marija D.; Pantić, Jelena R.; Zmejkoski, Danica; Zarubica, Aleksandra R.; Matović, Branko

(2016)

TY  - JOUR
AU  - Dmitrović, Svetlana
AU  - Jokić, Bojan M.
AU  - Prekajski, Marija D.
AU  - Pantić, Jelena R.
AU  - Zmejkoski, Danica
AU  - Zarubica, Aleksandra R.
AU  - Matović, Branko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1172
AB  - Spider silk poses excellent mechanical properties, tenacity and elasticity and it has been used as a template for calcite mineralization to improve load bearing strength of osteoconductive calcite. The samples were obtained by mimicking biomineralization for five days in order to follow formation and growth of calcite on the surface of spider silk. Crystal phase was detected by XRD and FTIR spectroscopy. Microstructure, crystal size and its morphology were studied by means of FESEM. After two days of processing, pure calcite phase was obtained, and a size of the formed crystals increased with prolongation of biomineralization.
T2  - Processing and Application of Ceramics
T1  - Synthesis and characterization of spider silk calcite composite
VL  - 10
IS  - 1
SP  - 37
EP  - 40
DO  - 10.2298/PAC1601037D
ER  - 
@article{
author = "Dmitrović, Svetlana and Jokić, Bojan M. and Prekajski, Marija D. and Pantić, Jelena R. and Zmejkoski, Danica and Zarubica, Aleksandra R. and Matović, Branko",
year = "2016",
abstract = "Spider silk poses excellent mechanical properties, tenacity and elasticity and it has been used as a template for calcite mineralization to improve load bearing strength of osteoconductive calcite. The samples were obtained by mimicking biomineralization for five days in order to follow formation and growth of calcite on the surface of spider silk. Crystal phase was detected by XRD and FTIR spectroscopy. Microstructure, crystal size and its morphology were studied by means of FESEM. After two days of processing, pure calcite phase was obtained, and a size of the formed crystals increased with prolongation of biomineralization.",
journal = "Processing and Application of Ceramics",
title = "Synthesis and characterization of spider silk calcite composite",
volume = "10",
number = "1",
pages = "37-40",
doi = "10.2298/PAC1601037D"
}
Dmitrović, S., Jokić, B. M., Prekajski, M. D., Pantić, J. R., Zmejkoski, D., Zarubica, A. R.,& Matović, B.. (2016). Synthesis and characterization of spider silk calcite composite. in Processing and Application of Ceramics, 10(1), 37-40.
https://doi.org/10.2298/PAC1601037D
Dmitrović S, Jokić BM, Prekajski MD, Pantić JR, Zmejkoski D, Zarubica AR, Matović B. Synthesis and characterization of spider silk calcite composite. in Processing and Application of Ceramics. 2016;10(1):37-40.
doi:10.2298/PAC1601037D .
Dmitrović, Svetlana, Jokić, Bojan M., Prekajski, Marija D., Pantić, Jelena R., Zmejkoski, Danica, Zarubica, Aleksandra R., Matović, Branko, "Synthesis and characterization of spider silk calcite composite" in Processing and Application of Ceramics, 10, no. 1 (2016):37-40,
https://doi.org/10.2298/PAC1601037D . .
3
3
3

Synthesis and characterization of Cr3+ doped TiO2 nanometric powders

Prekajski-Đorđević, Marija D.; Zarubica, Aleksandra R.; Babić, Biljana M.; Jokić, Bojan M.; Pantić, Jelena R.; Luković, Jelena M.; Matović, Branko

(Elsevier, 2016)

TY  - JOUR
AU  - Prekajski-Đorđević, Marija D.
AU  - Zarubica, Aleksandra R.
AU  - Babić, Biljana M.
AU  - Jokić, Bojan M.
AU  - Pantić, Jelena R.
AU  - Luković, Jelena M.
AU  - Matović, Branko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/824
AB  - Simple route was used for synthesis of nanostructured titania samples doped with 3 and 6 mol% of Cr3+ Titanium(IV)-isopropoxide and water were used as starting materials and as an agents for controlling hydrolysis and condensation reactions. The phase evolution of titania (TiO2) was followed by calcination at 400, 600 and 800 degrees C. The synthesized powders were examined by field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). Single-phase anatase was obtained at low temperature (400 degrees C) in all cases. The photocatalytic activity of TiO2 doped nanopowders was evaluated by the photocatalytic degradation of crystal violet in aqueous solution. The present study indicates that this simple synthesis method can be an effective route to produce efficient photoactive doped anatase nanopowders. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - Synthesis and characterization of Cr3+ doped TiO2 nanometric powders
VL  - 42
IS  - 1
SP  - 1862
EP  - 1869
DO  - 10.1016/j.ceramint.2015.09.151
ER  - 
@article{
author = "Prekajski-Đorđević, Marija D. and Zarubica, Aleksandra R. and Babić, Biljana M. and Jokić, Bojan M. and Pantić, Jelena R. and Luković, Jelena M. and Matović, Branko",
year = "2016",
abstract = "Simple route was used for synthesis of nanostructured titania samples doped with 3 and 6 mol% of Cr3+ Titanium(IV)-isopropoxide and water were used as starting materials and as an agents for controlling hydrolysis and condensation reactions. The phase evolution of titania (TiO2) was followed by calcination at 400, 600 and 800 degrees C. The synthesized powders were examined by field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). Single-phase anatase was obtained at low temperature (400 degrees C) in all cases. The photocatalytic activity of TiO2 doped nanopowders was evaluated by the photocatalytic degradation of crystal violet in aqueous solution. The present study indicates that this simple synthesis method can be an effective route to produce efficient photoactive doped anatase nanopowders. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "Synthesis and characterization of Cr3+ doped TiO2 nanometric powders",
volume = "42",
number = "1",
pages = "1862-1869",
doi = "10.1016/j.ceramint.2015.09.151"
}
Prekajski-Đorđević, M. D., Zarubica, A. R., Babić, B. M., Jokić, B. M., Pantić, J. R., Luković, J. M.,& Matović, B.. (2016). Synthesis and characterization of Cr3+ doped TiO2 nanometric powders. in Ceramics International
Elsevier., 42(1), 1862-1869.
https://doi.org/10.1016/j.ceramint.2015.09.151
Prekajski-Đorđević MD, Zarubica AR, Babić BM, Jokić BM, Pantić JR, Luković JM, Matović B. Synthesis and characterization of Cr3+ doped TiO2 nanometric powders. in Ceramics International. 2016;42(1):1862-1869.
doi:10.1016/j.ceramint.2015.09.151 .
Prekajski-Đorđević, Marija D., Zarubica, Aleksandra R., Babić, Biljana M., Jokić, Bojan M., Pantić, Jelena R., Luković, Jelena M., Matović, Branko, "Synthesis and characterization of Cr3+ doped TiO2 nanometric powders" in Ceramics International, 42, no. 1 (2016):1862-1869,
https://doi.org/10.1016/j.ceramint.2015.09.151 . .
1
6
5
6

Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres

Prekajski, Marija D.; Mirković, Miljana M.; Todorović, Bratislav Ž.; Matković, Aleksandar; Marinović-Cincović, Milena; Luković, Jelena M.; Matović, Branko

(Elsevier, 2016)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Mirković, Miljana M.
AU  - Todorović, Bratislav Ž.
AU  - Matković, Aleksandar
AU  - Marinović-Cincović, Milena
AU  - Luković, Jelena M.
AU  - Matović, Branko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/924
AB  - Nanoemulsion technique was applied for synthesis of carbonated strontium hydroxyapatite (CSrHAp) at room temperature. X-ray powder diffraction analysis accompanied with Rietveld refinement reviled that synthesized powder were single-phase hydroxyapatite. Fourier transform infrared (FTIR) spectroscopy showed that the CSrHAp was A-type substitution. The carbonate amount substituting the hydroxide group in the synthesized apatite was estimated, from the corresponding CO2 weight loss in the range 600-1100 degrees C. According to this empirical formula of as synthesized CHAp is S-10(PO4)(6)(OH)(0.60)(CO3)(0.70). These results were confirmed by the Rietveld refinement analysis. Using scanning electron microscopy analysis it was found that the synthesized CSrHAp particles were spherical in shape and that their sizes were in the nanometer range. Nanoemulsion strategy procedure provides a simple pathway to obtain single-phase CSrHAp. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Journal of the European Ceramic Society
T1  - Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres
VL  - 36
IS  - 5
SP  - 1293
EP  - 1298
DO  - 10.1016/j.jeurceramsoc.2015.11.045
ER  - 
@article{
author = "Prekajski, Marija D. and Mirković, Miljana M. and Todorović, Bratislav Ž. and Matković, Aleksandar and Marinović-Cincović, Milena and Luković, Jelena M. and Matović, Branko",
year = "2016",
abstract = "Nanoemulsion technique was applied for synthesis of carbonated strontium hydroxyapatite (CSrHAp) at room temperature. X-ray powder diffraction analysis accompanied with Rietveld refinement reviled that synthesized powder were single-phase hydroxyapatite. Fourier transform infrared (FTIR) spectroscopy showed that the CSrHAp was A-type substitution. The carbonate amount substituting the hydroxide group in the synthesized apatite was estimated, from the corresponding CO2 weight loss in the range 600-1100 degrees C. According to this empirical formula of as synthesized CHAp is S-10(PO4)(6)(OH)(0.60)(CO3)(0.70). These results were confirmed by the Rietveld refinement analysis. Using scanning electron microscopy analysis it was found that the synthesized CSrHAp particles were spherical in shape and that their sizes were in the nanometer range. Nanoemulsion strategy procedure provides a simple pathway to obtain single-phase CSrHAp. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of the European Ceramic Society",
title = "Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres",
volume = "36",
number = "5",
pages = "1293-1298",
doi = "10.1016/j.jeurceramsoc.2015.11.045"
}
Prekajski, M. D., Mirković, M. M., Todorović, B. Ž., Matković, A., Marinović-Cincović, M., Luković, J. M.,& Matović, B.. (2016). Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres. in Journal of the European Ceramic Society
Elsevier., 36(5), 1293-1298.
https://doi.org/10.1016/j.jeurceramsoc.2015.11.045
Prekajski MD, Mirković MM, Todorović BŽ, Matković A, Marinović-Cincović M, Luković JM, Matović B. Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres. in Journal of the European Ceramic Society. 2016;36(5):1293-1298.
doi:10.1016/j.jeurceramsoc.2015.11.045 .
Prekajski, Marija D., Mirković, Miljana M., Todorović, Bratislav Ž., Matković, Aleksandar, Marinović-Cincović, Milena, Luković, Jelena M., Matović, Branko, "Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres" in Journal of the European Ceramic Society, 36, no. 5 (2016):1293-1298,
https://doi.org/10.1016/j.jeurceramsoc.2015.11.045 . .
18
17
19

Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions

Stojmenović, Marija; Žunić, Milan; Gulicovski, Jelena J.; Dodevski, Vladimir; Prekajski, Marija D.; Raduovic, Aleksandar; Mentus, Slavko V.

(2016)

TY  - JOUR
AU  - Stojmenović, Marija
AU  - Žunić, Milan
AU  - Gulicovski, Jelena J.
AU  - Dodevski, Vladimir
AU  - Prekajski, Marija D.
AU  - Raduovic, Aleksandar
AU  - Mentus, Slavko V.
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1185
AB  - Nanoparticles of ceria ruthenium oxide solid solutions with composition Ce1-xRuxO2-delta (X=0.005-0.02) were successfully produced by self propagating room temperature synthesis using reaction between metal nitrates and sodium hydroxide. These compositions were characterized by X-ray powder diffraction (XRD), Raman spectroscopy, specific surface area, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The experimental measurements were complemented by calculations based on the ion packing model. XRD analysis revealed the presence of single phase solid solutions with CeO2 fluorite structure (regardless of dopants concentration) and Raman spectroscopy confirmed the presence of the RuO2 phase. Electrochemical impedance spectroscopy (EIS) measurements of sintered samples at different temperatures showed that the small ionic radius dopant reduces oxygen vacancies mobility that is responsible for the conductivity of these ceramics. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions
VL  - 42
IS  - 12
SP  - 14011
EP  - 14020
DO  - 10.1016/j.ceramint.2016.06.007
ER  - 
@article{
author = "Stojmenović, Marija and Žunić, Milan and Gulicovski, Jelena J. and Dodevski, Vladimir and Prekajski, Marija D. and Raduovic, Aleksandar and Mentus, Slavko V.",
year = "2016",
abstract = "Nanoparticles of ceria ruthenium oxide solid solutions with composition Ce1-xRuxO2-delta (X=0.005-0.02) were successfully produced by self propagating room temperature synthesis using reaction between metal nitrates and sodium hydroxide. These compositions were characterized by X-ray powder diffraction (XRD), Raman spectroscopy, specific surface area, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The experimental measurements were complemented by calculations based on the ion packing model. XRD analysis revealed the presence of single phase solid solutions with CeO2 fluorite structure (regardless of dopants concentration) and Raman spectroscopy confirmed the presence of the RuO2 phase. Electrochemical impedance spectroscopy (EIS) measurements of sintered samples at different temperatures showed that the small ionic radius dopant reduces oxygen vacancies mobility that is responsible for the conductivity of these ceramics. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions",
volume = "42",
number = "12",
pages = "14011-14020",
doi = "10.1016/j.ceramint.2016.06.007"
}
Stojmenović, M., Žunić, M., Gulicovski, J. J., Dodevski, V., Prekajski, M. D., Raduovic, A.,& Mentus, S. V.. (2016). Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions. in Ceramics International, 42(12), 14011-14020.
https://doi.org/10.1016/j.ceramint.2016.06.007
Stojmenović M, Žunić M, Gulicovski JJ, Dodevski V, Prekajski MD, Raduovic A, Mentus SV. Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions. in Ceramics International. 2016;42(12):14011-14020.
doi:10.1016/j.ceramint.2016.06.007 .
Stojmenović, Marija, Žunić, Milan, Gulicovski, Jelena J., Dodevski, Vladimir, Prekajski, Marija D., Raduovic, Aleksandar, Mentus, Slavko V., "Structural, morphological and electrical properties of Ce1-xRuxO2-delta (x=0.005-0.02) solid solutions" in Ceramics International, 42, no. 12 (2016):14011-14020,
https://doi.org/10.1016/j.ceramint.2016.06.007 . .
5
6
7

A novel reduction-oxidation synthetic route for hafnia

Matović, Branko; Pantić, Jelena R.; Luković, Jelena M.; Čebela, Maria; Dmitrović, Svetlana; Mirković, Miljana M.; Prekajski, Marija D.

(Elsevier, 2016)

TY  - JOUR
AU  - Matović, Branko
AU  - Pantić, Jelena R.
AU  - Luković, Jelena M.
AU  - Čebela, Maria
AU  - Dmitrović, Svetlana
AU  - Mirković, Miljana M.
AU  - Prekajski, Marija D.
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/826
AB  - Amorphous hafnia (HfO2) powders were synthesized through a novel reduction oxidation route, in which, metal hafnium was reduced from hafnium tetrachloride (HfCl4) by sodium borohydride (NaBH4), and then oxidized in ambient atmosphere. Upon calcinations, the powder crystallized to nanometric size HfO2 powder with monoclinic structure. Powder properties such as lattice parameters, crystallite and particle size were studied. X-ray diffraction analysis (XRD) was used to characterize structure and phase evolution in synthesized samples. Calculation of the average crystallite size (D) was performed on the basis of the full width at half maximum intensity (FWHM) of the XRD peaks. Williamson-Hall plots were used to separate the effect of the size and strain in the nanocrystals. The morphologies of powders calcinated at higher temperatures were followed by Scanning electron microscopy (SEM). (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
PB  - Elsevier
T2  - Ceramics International
T1  - A novel reduction-oxidation synthetic route for hafnia
VL  - 42
IS  - 1
SP  - 615
EP  - 620
DO  - 10.1016/j.ceramint.2015.08.155
ER  - 
@article{
author = "Matović, Branko and Pantić, Jelena R. and Luković, Jelena M. and Čebela, Maria and Dmitrović, Svetlana and Mirković, Miljana M. and Prekajski, Marija D.",
year = "2016",
abstract = "Amorphous hafnia (HfO2) powders were synthesized through a novel reduction oxidation route, in which, metal hafnium was reduced from hafnium tetrachloride (HfCl4) by sodium borohydride (NaBH4), and then oxidized in ambient atmosphere. Upon calcinations, the powder crystallized to nanometric size HfO2 powder with monoclinic structure. Powder properties such as lattice parameters, crystallite and particle size were studied. X-ray diffraction analysis (XRD) was used to characterize structure and phase evolution in synthesized samples. Calculation of the average crystallite size (D) was performed on the basis of the full width at half maximum intensity (FWHM) of the XRD peaks. Williamson-Hall plots were used to separate the effect of the size and strain in the nanocrystals. The morphologies of powders calcinated at higher temperatures were followed by Scanning electron microscopy (SEM). (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
publisher = "Elsevier",
journal = "Ceramics International",
title = "A novel reduction-oxidation synthetic route for hafnia",
volume = "42",
number = "1",
pages = "615-620",
doi = "10.1016/j.ceramint.2015.08.155"
}
Matović, B., Pantić, J. R., Luković, J. M., Čebela, M., Dmitrović, S., Mirković, M. M.,& Prekajski, M. D.. (2016). A novel reduction-oxidation synthetic route for hafnia. in Ceramics International
Elsevier., 42(1), 615-620.
https://doi.org/10.1016/j.ceramint.2015.08.155
Matović B, Pantić JR, Luković JM, Čebela M, Dmitrović S, Mirković MM, Prekajski MD. A novel reduction-oxidation synthetic route for hafnia. in Ceramics International. 2016;42(1):615-620.
doi:10.1016/j.ceramint.2015.08.155 .
Matović, Branko, Pantić, Jelena R., Luković, Jelena M., Čebela, Maria, Dmitrović, Svetlana, Mirković, Miljana M., Prekajski, Marija D., "A novel reduction-oxidation synthetic route for hafnia" in Ceramics International, 42, no. 1 (2016):615-620,
https://doi.org/10.1016/j.ceramint.2015.08.155 . .
13
13
13

Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect

Prekajski, Marija D.; Jokić, Bojan M.; Kalijadis, Ana; Maletaškić, Jelena; Stanković, Nadežda; Luković, Jelena M.; Matović, Branko

(2016)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Jokić, Bojan M.
AU  - Kalijadis, Ana
AU  - Maletaškić, Jelena
AU  - Stanković, Nadežda
AU  - Luković, Jelena M.
AU  - Matović, Branko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1328
AB  - Nanoemulsion technique, based on Ouzo effect, was applied for synthesis of the pure and silver doped (2.5 and 5 mol%) calcium hydroxyapatite (HAp). After calcination at 500 degrees C fully crystallized powders were obtained. X-ray powder diffraction analysis accompanied with Rietveld refinement revealed that the synthesized powders were single-phase hydroxyapatite. Raman spectroscopy also confirmed that the synthesized powders were single-phase. The obtained HAp particles were spherical in shape and their sizes were in the nanometer range which was revealed by field emission scanning electron microscopy analysis (FESEM). The successful synthesis of the single-phase Ag doped HAp showed that nanoemulsion method is a simple technique for obtaining pure and doped hydroxyapatite nanospheres.
T2  - Processing and Application of Ceramics
T1  - Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect
VL  - 10
IS  - 3
SP  - 169
EP  - 174
DO  - 10.2298/PAC1603169P
ER  - 
@article{
author = "Prekajski, Marija D. and Jokić, Bojan M. and Kalijadis, Ana and Maletaškić, Jelena and Stanković, Nadežda and Luković, Jelena M. and Matović, Branko",
year = "2016",
abstract = "Nanoemulsion technique, based on Ouzo effect, was applied for synthesis of the pure and silver doped (2.5 and 5 mol%) calcium hydroxyapatite (HAp). After calcination at 500 degrees C fully crystallized powders were obtained. X-ray powder diffraction analysis accompanied with Rietveld refinement revealed that the synthesized powders were single-phase hydroxyapatite. Raman spectroscopy also confirmed that the synthesized powders were single-phase. The obtained HAp particles were spherical in shape and their sizes were in the nanometer range which was revealed by field emission scanning electron microscopy analysis (FESEM). The successful synthesis of the single-phase Ag doped HAp showed that nanoemulsion method is a simple technique for obtaining pure and doped hydroxyapatite nanospheres.",
journal = "Processing and Application of Ceramics",
title = "Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect",
volume = "10",
number = "3",
pages = "169-174",
doi = "10.2298/PAC1603169P"
}
Prekajski, M. D., Jokić, B. M., Kalijadis, A., Maletaškić, J., Stanković, N., Luković, J. M.,& Matović, B.. (2016). Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect. in Processing and Application of Ceramics, 10(3), 169-174.
https://doi.org/10.2298/PAC1603169P
Prekajski MD, Jokić BM, Kalijadis A, Maletaškić J, Stanković N, Luković JM, Matović B. Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect. in Processing and Application of Ceramics. 2016;10(3):169-174.
doi:10.2298/PAC1603169P .
Prekajski, Marija D., Jokić, Bojan M., Kalijadis, Ana, Maletaškić, Jelena, Stanković, Nadežda, Luković, Jelena M., Matović, Branko, "Synthesis of silver doped hydroxyapatite nanospheres using Ouzo effect" in Processing and Application of Ceramics, 10, no. 3 (2016):169-174,
https://doi.org/10.2298/PAC1603169P . .
6
7
7

Synthesis and densification of single-phase mayenite (C12A7)

Matović, Branko; Prekajski, Marija D.; Pantić, Jelena R.; Braeuniger, Thomas; Rosić, Milena; Zagorac, Dejan; Milivojević, Dušan

(2016)

TY  - JOUR
AU  - Matović, Branko
AU  - Prekajski, Marija D.
AU  - Pantić, Jelena R.
AU  - Braeuniger, Thomas
AU  - Rosić, Milena
AU  - Zagorac, Dejan
AU  - Milivojević, Dušan
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1227
AB  - Mayenite (C12A7) powders have been synthesized by self-combustion method (glycine/nitrate procedure - GNP and a newly suggested modified glycine/nitrate procedure - MGNP). The MGNP is derived from the GNP by substituting a portion of Al-nitrate with the less expensive Al-acetate. The effect of synthesis conditions of both procedures on the phase evolution was studied. Mayenite samples, obtained by using GNP and MGNP, followed by thermal treatment in air, were analyzed by using XRD method. The obtained results showed that crystallization started at 900 degrees C for the GNP and at 750 degrees C for the MGNP while below these temperatures samples are amorphous. Also, only observed phase was mayenite for MGNP, while a secondary phase is present in samples synthesized by using GNP. Scanning electron microscopy (SEM), electron paramagnetic resonance (EPR) and nuclear magnetic resonance spectroscopy (NMR) were used to characterize the pure mayenite phase at room temperature. Sintering behavior was studied by dilatometry. A relative density of 94% is obtained at 1300 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Journal of the European Ceramic Society
T1  - Synthesis and densification of single-phase mayenite (C12A7)
VL  - 36
IS  - 16
SP  - 4237
EP  - 4241
DO  - 10.1016/j.jeurceramsoc.2016.06.014
ER  - 
@article{
author = "Matović, Branko and Prekajski, Marija D. and Pantić, Jelena R. and Braeuniger, Thomas and Rosić, Milena and Zagorac, Dejan and Milivojević, Dušan",
year = "2016",
abstract = "Mayenite (C12A7) powders have been synthesized by self-combustion method (glycine/nitrate procedure - GNP and a newly suggested modified glycine/nitrate procedure - MGNP). The MGNP is derived from the GNP by substituting a portion of Al-nitrate with the less expensive Al-acetate. The effect of synthesis conditions of both procedures on the phase evolution was studied. Mayenite samples, obtained by using GNP and MGNP, followed by thermal treatment in air, were analyzed by using XRD method. The obtained results showed that crystallization started at 900 degrees C for the GNP and at 750 degrees C for the MGNP while below these temperatures samples are amorphous. Also, only observed phase was mayenite for MGNP, while a secondary phase is present in samples synthesized by using GNP. Scanning electron microscopy (SEM), electron paramagnetic resonance (EPR) and nuclear magnetic resonance spectroscopy (NMR) were used to characterize the pure mayenite phase at room temperature. Sintering behavior was studied by dilatometry. A relative density of 94% is obtained at 1300 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Journal of the European Ceramic Society",
title = "Synthesis and densification of single-phase mayenite (C12A7)",
volume = "36",
number = "16",
pages = "4237-4241",
doi = "10.1016/j.jeurceramsoc.2016.06.014"
}
Matović, B., Prekajski, M. D., Pantić, J. R., Braeuniger, T., Rosić, M., Zagorac, D.,& Milivojević, D.. (2016). Synthesis and densification of single-phase mayenite (C12A7). in Journal of the European Ceramic Society, 36(16), 4237-4241.
https://doi.org/10.1016/j.jeurceramsoc.2016.06.014
Matović B, Prekajski MD, Pantić JR, Braeuniger T, Rosić M, Zagorac D, Milivojević D. Synthesis and densification of single-phase mayenite (C12A7). in Journal of the European Ceramic Society. 2016;36(16):4237-4241.
doi:10.1016/j.jeurceramsoc.2016.06.014 .
Matović, Branko, Prekajski, Marija D., Pantić, Jelena R., Braeuniger, Thomas, Rosić, Milena, Zagorac, Dejan, Milivojević, Dušan, "Synthesis and densification of single-phase mayenite (C12A7)" in Journal of the European Ceramic Society, 36, no. 16 (2016):4237-4241,
https://doi.org/10.1016/j.jeurceramsoc.2016.06.014 . .
10
10
11

Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility

Welsch, A-M.; Murawski, D.; Prekajski, Marija D.; Vulic, P.; Kremenović, Aleksandar S.

(2015)

TY  - JOUR
AU  - Welsch, A-M.
AU  - Murawski, D.
AU  - Prekajski, Marija D.
AU  - Vulic, P.
AU  - Kremenović, Aleksandar S.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/501
AB  - With the increased interest in application of Li aluminosilicate materials as solid electrolytes, this study focuses on investigating the influence of structure on conductivity properties in single-crystal LiAlSi2O6 which is characterized by three crystal polymorphs where only structural arrangements differ while the amount of mobile carriers is identical. Two single-crystal polymorphic phases produced at ambient pressure are with tetragonal P4(1)2(1)2 symmetry and hexagonal P6(2)22 symmetry, also referred to as beta- and gamma-spodumene in the older literature. For this study, flux-grown hexagonal spodumene single-crystals were measured for conductivity parallel to the crystallographic c-axis and the results were compared with previously published results for tetragonal spodumene, both as single-crystal and polycrystalline aggregate, monoclinic spodumene (alpha-spodumene) and LiAlSi2O6 glass. The activation energy E (a) of 79.69 +/- A 0.38 kJ/mol for hexagonal phase is very similar to the other crystalline polymorphs with the same orientation. However, the sigma (DC) in hexagonal spodumene was determined to be higher than other crystalline phases and about 1.5 orders of magnitude lower than the conductivity in glass LiAlSi2O6 phase. Additionally, the densities of atomic packing were compared between phases, and the differences in the openness of the structures indicate that the more dominant effect on the Li mobility lies with the actual spatial arrangement of Li sites and the Si/Al sublattice.
T2  - Physics and Chemistry of Minerals
T1  - Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility
VL  - 42
IS  - 5
SP  - 413
EP  - 420
DO  - 10.1007/s00269-015-0732-2
ER  - 
@article{
author = "Welsch, A-M. and Murawski, D. and Prekajski, Marija D. and Vulic, P. and Kremenović, Aleksandar S.",
year = "2015",
abstract = "With the increased interest in application of Li aluminosilicate materials as solid electrolytes, this study focuses on investigating the influence of structure on conductivity properties in single-crystal LiAlSi2O6 which is characterized by three crystal polymorphs where only structural arrangements differ while the amount of mobile carriers is identical. Two single-crystal polymorphic phases produced at ambient pressure are with tetragonal P4(1)2(1)2 symmetry and hexagonal P6(2)22 symmetry, also referred to as beta- and gamma-spodumene in the older literature. For this study, flux-grown hexagonal spodumene single-crystals were measured for conductivity parallel to the crystallographic c-axis and the results were compared with previously published results for tetragonal spodumene, both as single-crystal and polycrystalline aggregate, monoclinic spodumene (alpha-spodumene) and LiAlSi2O6 glass. The activation energy E (a) of 79.69 +/- A 0.38 kJ/mol for hexagonal phase is very similar to the other crystalline polymorphs with the same orientation. However, the sigma (DC) in hexagonal spodumene was determined to be higher than other crystalline phases and about 1.5 orders of magnitude lower than the conductivity in glass LiAlSi2O6 phase. Additionally, the densities of atomic packing were compared between phases, and the differences in the openness of the structures indicate that the more dominant effect on the Li mobility lies with the actual spatial arrangement of Li sites and the Si/Al sublattice.",
journal = "Physics and Chemistry of Minerals",
title = "Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility",
volume = "42",
number = "5",
pages = "413-420",
doi = "10.1007/s00269-015-0732-2"
}
Welsch, A-M., Murawski, D., Prekajski, M. D., Vulic, P.,& Kremenović, A. S.. (2015). Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility. in Physics and Chemistry of Minerals, 42(5), 413-420.
https://doi.org/10.1007/s00269-015-0732-2
Welsch A, Murawski D, Prekajski MD, Vulic P, Kremenović AS. Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility. in Physics and Chemistry of Minerals. 2015;42(5):413-420.
doi:10.1007/s00269-015-0732-2 .
Welsch, A-M., Murawski, D., Prekajski, Marija D., Vulic, P., Kremenović, Aleksandar S., "Ionic conductivity in single-crystal LiAlSi2O6: influence of structure on lithium mobility" in Physics and Chemistry of Minerals, 42, no. 5 (2015):413-420,
https://doi.org/10.1007/s00269-015-0732-2 . .
11
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13

Synthesis and characterization of tungsten carbide fine powders

Luković, Jelena M.; Babić, Biljana M.; Bučevac, Dušan; Prekajski, Marija D.; Pantić, Jelena R.; Baščarević, Zvezdana D.; Matović, Branko

(2015)

TY  - JOUR
AU  - Luković, Jelena M.
AU  - Babić, Biljana M.
AU  - Bučevac, Dušan
AU  - Prekajski, Marija D.
AU  - Pantić, Jelena R.
AU  - Baščarević, Zvezdana D.
AU  - Matović, Branko
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/288
AB  - Fine tungsten carbide (WC) powder was prepared by solid state reaction between tungsten powder (W) and activated carbon cloth as a new carbon (C) source. The effect of temperature and time of heat treatment as well as the effect of C/W ratio on WC phase formation was studied. The results obtained by X-ray powder diffraction (XRPD) show that obtained powder is single WC. Microstructure and morphology was determinate by means of scanning electron microscopy (SEM). Brunauer-Emmett-Teller (BET) method was used for examining specific surface area and texture of obtained powders. It was found that WC powder was successfully synthesized in excess carbon after eight-hour heat treatment at relatively low temperature (1000 degrees C). (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Synthesis and characterization of tungsten carbide fine powders
VL  - 41
IS  - 1
SP  - 1271
EP  - 1277
DO  - 10.1016/j.ceramint.2014.09.057
ER  - 
@article{
author = "Luković, Jelena M. and Babić, Biljana M. and Bučevac, Dušan and Prekajski, Marija D. and Pantić, Jelena R. and Baščarević, Zvezdana D. and Matović, Branko",
year = "2015",
abstract = "Fine tungsten carbide (WC) powder was prepared by solid state reaction between tungsten powder (W) and activated carbon cloth as a new carbon (C) source. The effect of temperature and time of heat treatment as well as the effect of C/W ratio on WC phase formation was studied. The results obtained by X-ray powder diffraction (XRPD) show that obtained powder is single WC. Microstructure and morphology was determinate by means of scanning electron microscopy (SEM). Brunauer-Emmett-Teller (BET) method was used for examining specific surface area and texture of obtained powders. It was found that WC powder was successfully synthesized in excess carbon after eight-hour heat treatment at relatively low temperature (1000 degrees C). (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Synthesis and characterization of tungsten carbide fine powders",
volume = "41",
number = "1",
pages = "1271-1277",
doi = "10.1016/j.ceramint.2014.09.057"
}
Luković, J. M., Babić, B. M., Bučevac, D., Prekajski, M. D., Pantić, J. R., Baščarević, Z. D.,& Matović, B.. (2015). Synthesis and characterization of tungsten carbide fine powders. in Ceramics International, 41(1), 1271-1277.
https://doi.org/10.1016/j.ceramint.2014.09.057
Luković JM, Babić BM, Bučevac D, Prekajski MD, Pantić JR, Baščarević ZD, Matović B. Synthesis and characterization of tungsten carbide fine powders. in Ceramics International. 2015;41(1):1271-1277.
doi:10.1016/j.ceramint.2014.09.057 .
Luković, Jelena M., Babić, Biljana M., Bučevac, Dušan, Prekajski, Marija D., Pantić, Jelena R., Baščarević, Zvezdana D., Matović, Branko, "Synthesis and characterization of tungsten carbide fine powders" in Ceramics International, 41, no. 1 (2015):1271-1277,
https://doi.org/10.1016/j.ceramint.2014.09.057 . .
19
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Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu

Prekajski, Marija D.

(Универзитет у Београду, Рударско-геолошки факултет, 2014)

TY  - THES
AU  - Prekajski, Marija D.
PY  - 2014
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=3664
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:12470/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=45734927
UR  - http://nardus.mpn.gov.rs/123456789/6348
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7299
AB  - Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 – 0,5)monofazna jedinjenja koja kristališu teseralno sa fluoritskim tipom strukture, kakvuimaju CeO2 i visokotemperaturna polimorfna modifikacija, δ-Bi2O3. Utvrđeno je dagranica rastvorljivosti jona Bi3+ u strukturi CeO2 iznosi 50 at.% Bi i da sa povećavanjemsadržaja Bi iznad 50 at.% dolazi do izdvajanja sekundarne faze, α-Bi2O3. Veličinekristalita za sva sintetisana jedinjenja su nanodimenzione sa prosečnom veličinommanjom od 5 nm, izuzev u slučaju α-Bi2O3, čija veličina kristalita iznosi 541 nm.Iz Ritveldove analize difrakcionih podataka dobijenih na polikristalnimuzorcima koji sadrže do 50 at.% Bi, proizilazi da se sa porastom koncentracije Bi iugradnjom većeg jona Bi3+ na mesto manjeg Ce4+, povećavaju parametri a jediničnihćelija dok rezultati analize difrakcionih profila pokazuju porast mikrostrukturnihnaprezanja. Hemijski sastav sintetisanih čvrstih rastvora, koji je određen pomoćuskenirajuće elektronske mikroskopije u kombinaciji sa EDS analizom, približno jejednak željenom, tj. nominalnom sastavu. Sintetisani prahovi pokazuju strukturuneuniformno raspoređenih rastresitih aglomerata sa srednjom veličinom čestica od 0,1do 0,4 μm.Optička svojstva proučavana su metodom spektroskopske elipsometrije, pričemu je utvrđeno da dopiranje niževalentnim jonima Bi3+ dovodi do pomakaenergijskog procepa ka nižim energijama, tj. apsorpciona granicaCe1-xBixO2-δ pomera se ka vidljivom delu spektra, u odnosu na nedopiran CeO2, kodkojeg se apsorpciona granica nalazi u UV oblasti...
AB  - A series of nanocrystalline powders of solid solutions in pseudo-binaryCeO2-Bi2O3 system has been prepared from metal nitrates and sodium hydroxide usingthe simple and cost effective self-propagating room temperature reaction. Besides theend-members of the sequence, CeO2 and low-temperature polymorphic modification,α-Bi2O3, solid solutions with nominal composition Ce1-xBixO2-δ, x = 0.1, 0.2, 0.3, 0.4,0.5, 0.6, 0.7, 0.8, 0.9, were also synthesized. The results of the study by X-ray powderdiffraction and Raman spectroscopic analyses showed that the synthesized powders withlower bismuth contents (x = 0.1 – 0.5) are monophased samples which have the bodycenteredcubic fluorite-type structure like CeO2 and high-temperature polymorphicmodification, δ-Bi2O3. The experimentally determined solubility limit of Bi3+ in thecrystal structure of CeO2 is 50 at.% of Bi3+ ions. The increase of Bi quantity above50 at.% causes the formation of the α-Bi2O3 as a secondary phase. Crystallite size of allsynthesized powders is in the nanometric range with an average less than 5 nm in size,except in the case of α-Bi2O3 where the crystallite size is 541 nm.The Rietveld and diffraction profile analysis of samples containing up to 50 at.%Bi showed that the unit cell parameter a and microstrains increase with the increasing ofbismuth amount and the entrance of the larger Bi3+ ion at the Ce4+ position. Thechemical composition of the synthesized solid solutions, which was determined byscanning electron microscopy coupled with EDS analysis, is very close to the desirednominal one. The synthesized powders have the structure of non-uniform spread of looseagglomerates with average particle sizes ranging from 0.1 to 0.4 μm.The optical properties were studied using spectroscopic ellipsometry. It wasshown that the incorporation of Bi3+ ions of lower oxidation state than Ce4+ in CeO2leads to a shift of the energy gap to lower energies. This is associated with the shift ofthe absorption limit of Ce1-xBixO2-δ solid solutions toward the visible spectrumcompared to the undoped CeO2 in which the absorption limit is in the UV range...
PB  - Универзитет у Београду, Рударско-геолошки факултет
T2  - Универзитет у Београду
T1  - Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu
T1  - Synthesis and characterization of CeO2-Bi2O3 solid solution
ER  - 
@phdthesis{
author = "Prekajski, Marija D.",
year = "2014",
abstract = "Nanoprahovi kristalnih faza iz serije čvrstih rastvora u pseudo-binarnom sistemuCeO2-Bi2O3 sintetisani su primenom jednostavne i ekonomične samopropagirajućemetode na sobnoj temperaturi korišćenjem nitrata metala i natrijum-hidroksida kaopolaznih supstanci. Osim krajnjih članova niza, CeO2 i niskotemperaturne polimorfnemodifikacije α-Bi2O3, sintetisani su i čvrsti rastvori nominalnog sastava Ce1-xBixO2-δ,gde je x = 0,1; 0,2; 0,3; 0,4; 0,5; 0,6; 0,7; 0,8; 0,9. Rezultati proučavanja metodomrendgenske difraktometrije na polikristalnom materijalu i ramanske spektroskopskeanalize pokazali su da su sintetisani prahovi sa nižim sadržajem bizmuta (x = 0,1 – 0,5)monofazna jedinjenja koja kristališu teseralno sa fluoritskim tipom strukture, kakvuimaju CeO2 i visokotemperaturna polimorfna modifikacija, δ-Bi2O3. Utvrđeno je dagranica rastvorljivosti jona Bi3+ u strukturi CeO2 iznosi 50 at.% Bi i da sa povećavanjemsadržaja Bi iznad 50 at.% dolazi do izdvajanja sekundarne faze, α-Bi2O3. Veličinekristalita za sva sintetisana jedinjenja su nanodimenzione sa prosečnom veličinommanjom od 5 nm, izuzev u slučaju α-Bi2O3, čija veličina kristalita iznosi 541 nm.Iz Ritveldove analize difrakcionih podataka dobijenih na polikristalnimuzorcima koji sadrže do 50 at.% Bi, proizilazi da se sa porastom koncentracije Bi iugradnjom većeg jona Bi3+ na mesto manjeg Ce4+, povećavaju parametri a jediničnihćelija dok rezultati analize difrakcionih profila pokazuju porast mikrostrukturnihnaprezanja. Hemijski sastav sintetisanih čvrstih rastvora, koji je određen pomoćuskenirajuće elektronske mikroskopije u kombinaciji sa EDS analizom, približno jejednak željenom, tj. nominalnom sastavu. Sintetisani prahovi pokazuju strukturuneuniformno raspoređenih rastresitih aglomerata sa srednjom veličinom čestica od 0,1do 0,4 μm.Optička svojstva proučavana su metodom spektroskopske elipsometrije, pričemu je utvrđeno da dopiranje niževalentnim jonima Bi3+ dovodi do pomakaenergijskog procepa ka nižim energijama, tj. apsorpciona granicaCe1-xBixO2-δ pomera se ka vidljivom delu spektra, u odnosu na nedopiran CeO2, kodkojeg se apsorpciona granica nalazi u UV oblasti..., A series of nanocrystalline powders of solid solutions in pseudo-binaryCeO2-Bi2O3 system has been prepared from metal nitrates and sodium hydroxide usingthe simple and cost effective self-propagating room temperature reaction. Besides theend-members of the sequence, CeO2 and low-temperature polymorphic modification,α-Bi2O3, solid solutions with nominal composition Ce1-xBixO2-δ, x = 0.1, 0.2, 0.3, 0.4,0.5, 0.6, 0.7, 0.8, 0.9, were also synthesized. The results of the study by X-ray powderdiffraction and Raman spectroscopic analyses showed that the synthesized powders withlower bismuth contents (x = 0.1 – 0.5) are monophased samples which have the bodycenteredcubic fluorite-type structure like CeO2 and high-temperature polymorphicmodification, δ-Bi2O3. The experimentally determined solubility limit of Bi3+ in thecrystal structure of CeO2 is 50 at.% of Bi3+ ions. The increase of Bi quantity above50 at.% causes the formation of the α-Bi2O3 as a secondary phase. Crystallite size of allsynthesized powders is in the nanometric range with an average less than 5 nm in size,except in the case of α-Bi2O3 where the crystallite size is 541 nm.The Rietveld and diffraction profile analysis of samples containing up to 50 at.%Bi showed that the unit cell parameter a and microstrains increase with the increasing ofbismuth amount and the entrance of the larger Bi3+ ion at the Ce4+ position. Thechemical composition of the synthesized solid solutions, which was determined byscanning electron microscopy coupled with EDS analysis, is very close to the desirednominal one. The synthesized powders have the structure of non-uniform spread of looseagglomerates with average particle sizes ranging from 0.1 to 0.4 μm.The optical properties were studied using spectroscopic ellipsometry. It wasshown that the incorporation of Bi3+ ions of lower oxidation state than Ce4+ in CeO2leads to a shift of the energy gap to lower energies. This is associated with the shift ofthe absorption limit of Ce1-xBixO2-δ solid solutions toward the visible spectrumcompared to the undoped CeO2 in which the absorption limit is in the UV range...",
publisher = "Универзитет у Београду, Рударско-геолошки факултет",
journal = "Универзитет у Београду",
title = "Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu, Synthesis and characterization of CeO2-Bi2O3 solid solution"
}
Prekajski, M. D.. (2014). Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu. in Универзитет у Београду
Универзитет у Београду, Рударско-геолошки факултет..
Prekajski MD. Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu. in Универзитет у Београду. 2014;..
Prekajski, Marija D., "Sinteza i karakterizacija nanoprahova u CeO2-Bi2O3 sistemu" in Универзитет у Београду (2014).

Electrical properties of multidoped ceria

Stojmenović, Marija; Bošković, Snežana B.; Zunic, M.; Varela, J. A.; Prekajski, Marija D.; Matović, Branko; Mentus, Slavko V.

(2014)

TY  - JOUR
AU  - Stojmenović, Marija
AU  - Bošković, Snežana B.
AU  - Zunic, M.
AU  - Varela, J. A.
AU  - Prekajski, Marija D.
AU  - Matović, Branko
AU  - Mentus, Slavko V.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6029
AB  - Multidoped nanosized ceria powders were prepared by either modified glycine nitrate procedure (MGNP) or self-propagating reaction at room temperature (SPRT). As the dopants to CeO2, trivalent rare earth oxides such as Nd2O3, Sm2O3, Gd2O3, Dy2O3 and Y2O3 were used, with the total molar fraction of 20%. The pressed powder pellets were subjected to the densification by sintering at 1500 degrees C, in an air atmosphere. A single-phase crystalline form was evidenced by X-ray diffractometry for both sintered materials. By means of complex impedance measurements, the conductivity of the sintered samples was determined as a function of temperature. At 700 degrees C, the conductivity amounted to 2.19 x 10(-2) and 1.40 x 10(-2) ohm(-1) cm(-1) for the SPRT and for the MGNP sample, respectively. The corresponding values of activation energies of conductivity amounted to 0.72 (MGNP) and 0.59 (SPRT) eV in the temperature range 550-700 degrees C. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Electrical properties of multidoped ceria
VL  - 40
IS  - 7
SP  - 9285
EP  - 9292
DO  - 10.1016/j.ceramint.2014.01.151
ER  - 
@article{
author = "Stojmenović, Marija and Bošković, Snežana B. and Zunic, M. and Varela, J. A. and Prekajski, Marija D. and Matović, Branko and Mentus, Slavko V.",
year = "2014",
abstract = "Multidoped nanosized ceria powders were prepared by either modified glycine nitrate procedure (MGNP) or self-propagating reaction at room temperature (SPRT). As the dopants to CeO2, trivalent rare earth oxides such as Nd2O3, Sm2O3, Gd2O3, Dy2O3 and Y2O3 were used, with the total molar fraction of 20%. The pressed powder pellets were subjected to the densification by sintering at 1500 degrees C, in an air atmosphere. A single-phase crystalline form was evidenced by X-ray diffractometry for both sintered materials. By means of complex impedance measurements, the conductivity of the sintered samples was determined as a function of temperature. At 700 degrees C, the conductivity amounted to 2.19 x 10(-2) and 1.40 x 10(-2) ohm(-1) cm(-1) for the SPRT and for the MGNP sample, respectively. The corresponding values of activation energies of conductivity amounted to 0.72 (MGNP) and 0.59 (SPRT) eV in the temperature range 550-700 degrees C. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Electrical properties of multidoped ceria",
volume = "40",
number = "7",
pages = "9285-9292",
doi = "10.1016/j.ceramint.2014.01.151"
}
Stojmenović, M., Bošković, S. B., Zunic, M., Varela, J. A., Prekajski, M. D., Matović, B.,& Mentus, S. V.. (2014). Electrical properties of multidoped ceria. in Ceramics International, 40(7), 9285-9292.
https://doi.org/10.1016/j.ceramint.2014.01.151
Stojmenović M, Bošković SB, Zunic M, Varela JA, Prekajski MD, Matović B, Mentus SV. Electrical properties of multidoped ceria. in Ceramics International. 2014;40(7):9285-9292.
doi:10.1016/j.ceramint.2014.01.151 .
Stojmenović, Marija, Bošković, Snežana B., Zunic, M., Varela, J. A., Prekajski, Marija D., Matović, Branko, Mentus, Slavko V., "Electrical properties of multidoped ceria" in Ceramics International, 40, no. 7 (2014):9285-9292,
https://doi.org/10.1016/j.ceramint.2014.01.151 . .
13
14
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Sintering and electrical properties of Ce1-xBixO2-delta solid solution

Prekajski, Marija D.; Stojmenović, Marija; Radojkovic, A.; Branković, Goran O.; Oraon, H.; Subasri, R.; Matović, Branko

(2014)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Stojmenović, Marija
AU  - Radojkovic, A.
AU  - Branković, Goran O.
AU  - Oraon, H.
AU  - Subasri, R.
AU  - Matović, Branko
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/187
AB  - Solid solution Ce1-xBixO2-delta nanopowders with the composition of x = 0.1-0.5 were synthesized by using Self Propagating Room Temperature procedure (SPRT). The results obtained by XRPD show that synthesized samples were single-phase solid solution at room temperature. Powders were densified by using Conventional (CS) and Microwave (MS) Sintering techniques at different temperatures, in an air atmosphere for 1 h. Scanning electron microscopy (SEM) and complex impedance method measurements were carried out on sintered samples. Maximum achieved density was for sample with Ce0.80Bi0.20O2-delta composition for both applied sintering techniques. The highest conductivity was obtained for the ceramic composition Ce0.80Bi0.20O2-delta sintered by microwave technique at 700 degrees C. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Sintering and electrical properties of Ce1-xBixO2-delta solid solution
VL  - 617
SP  - 563
EP  - 568
DO  - 10.1016/j.jallcom.2014.08.090
ER  - 
@article{
author = "Prekajski, Marija D. and Stojmenović, Marija and Radojkovic, A. and Branković, Goran O. and Oraon, H. and Subasri, R. and Matović, Branko",
year = "2014",
abstract = "Solid solution Ce1-xBixO2-delta nanopowders with the composition of x = 0.1-0.5 were synthesized by using Self Propagating Room Temperature procedure (SPRT). The results obtained by XRPD show that synthesized samples were single-phase solid solution at room temperature. Powders were densified by using Conventional (CS) and Microwave (MS) Sintering techniques at different temperatures, in an air atmosphere for 1 h. Scanning electron microscopy (SEM) and complex impedance method measurements were carried out on sintered samples. Maximum achieved density was for sample with Ce0.80Bi0.20O2-delta composition for both applied sintering techniques. The highest conductivity was obtained for the ceramic composition Ce0.80Bi0.20O2-delta sintered by microwave technique at 700 degrees C. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Sintering and electrical properties of Ce1-xBixO2-delta solid solution",
volume = "617",
pages = "563-568",
doi = "10.1016/j.jallcom.2014.08.090"
}
Prekajski, M. D., Stojmenović, M., Radojkovic, A., Branković, G. O., Oraon, H., Subasri, R.,& Matović, B.. (2014). Sintering and electrical properties of Ce1-xBixO2-delta solid solution. in Journal of Alloys and Compounds, 617, 563-568.
https://doi.org/10.1016/j.jallcom.2014.08.090
Prekajski MD, Stojmenović M, Radojkovic A, Branković GO, Oraon H, Subasri R, Matović B. Sintering and electrical properties of Ce1-xBixO2-delta solid solution. in Journal of Alloys and Compounds. 2014;617:563-568.
doi:10.1016/j.jallcom.2014.08.090 .
Prekajski, Marija D., Stojmenović, Marija, Radojkovic, A., Branković, Goran O., Oraon, H., Subasri, R., Matović, Branko, "Sintering and electrical properties of Ce1-xBixO2-delta solid solution" in Journal of Alloys and Compounds, 617 (2014):563-568,
https://doi.org/10.1016/j.jallcom.2014.08.090 . .
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15

Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template

Prekajski, Marija D.; Babić, Biljana M.; Bučevac, Dušan; Pantić, Jelena R.; Gulicovski, Jelena J.; Miljkovic, Miroslav; Matović, Branko

(2014)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Babić, Biljana M.
AU  - Bučevac, Dušan
AU  - Pantić, Jelena R.
AU  - Gulicovski, Jelena J.
AU  - Miljkovic, Miroslav
AU  - Matović, Branko
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/2747
AB  - A new technology based on bio-templating approach was proposed in this paper. Egg-shell membrane (ESM) has been employed as a natural biotemplate. Fibrous oxide ceramics was prepared by wet impregnation of biological template with water solution of cerium nitrate. The template was derived from membranes of fresh chicken eggs. Repeated impregnation, pyrolysis and final calcination in the range of 600 to 1200 degrees C in air resulted in template burnout and consolidation of the oxide layers. At low temperatures, the obtained products had structure which corresponded to the negative replication of biological templates. Unique bio-morphic CeO2 microstructures with interwoven networks were synthesized and characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD), whereas low-temperature nitrogen adsorption (BET) method was used in order to characterize porous properties.
T2  - Processing and Application of Ceramics
T1  - Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template
VL  - 8
IS  - 2
SP  - 81
EP  - 85
DO  - 10.2298/PAC1402081P
ER  - 
@article{
author = "Prekajski, Marija D. and Babić, Biljana M. and Bučevac, Dušan and Pantić, Jelena R. and Gulicovski, Jelena J. and Miljkovic, Miroslav and Matović, Branko",
year = "2014",
abstract = "A new technology based on bio-templating approach was proposed in this paper. Egg-shell membrane (ESM) has been employed as a natural biotemplate. Fibrous oxide ceramics was prepared by wet impregnation of biological template with water solution of cerium nitrate. The template was derived from membranes of fresh chicken eggs. Repeated impregnation, pyrolysis and final calcination in the range of 600 to 1200 degrees C in air resulted in template burnout and consolidation of the oxide layers. At low temperatures, the obtained products had structure which corresponded to the negative replication of biological templates. Unique bio-morphic CeO2 microstructures with interwoven networks were synthesized and characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD), whereas low-temperature nitrogen adsorption (BET) method was used in order to characterize porous properties.",
journal = "Processing and Application of Ceramics",
title = "Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template",
volume = "8",
number = "2",
pages = "81-85",
doi = "10.2298/PAC1402081P"
}
Prekajski, M. D., Babić, B. M., Bučevac, D., Pantić, J. R., Gulicovski, J. J., Miljkovic, M.,& Matović, B.. (2014). Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template. in Processing and Application of Ceramics, 8(2), 81-85.
https://doi.org/10.2298/PAC1402081P
Prekajski MD, Babić BM, Bučevac D, Pantić JR, Gulicovski JJ, Miljkovic M, Matović B. Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template. in Processing and Application of Ceramics. 2014;8(2):81-85.
doi:10.2298/PAC1402081P .
Prekajski, Marija D., Babić, Biljana M., Bučevac, Dušan, Pantić, Jelena R., Gulicovski, Jelena J., Miljkovic, Miroslav, Matović, Branko, "Synthesis and characterization of biomorphic CeO2 obtained by using egg shell membrane as template" in Processing and Application of Ceramics, 8, no. 2 (2014):81-85,
https://doi.org/10.2298/PAC1402081P . .
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7

Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation

Pantić, Jelena R.; Prekajski, Marija D.; Dramićanin, Miroslav; Abazović, Nadica; Vukovic, Nikola; Kremenović, Aleksandar S.; Matović, Branko

(2013)

TY  - JOUR
AU  - Pantić, Jelena R.
AU  - Prekajski, Marija D.
AU  - Dramićanin, Miroslav
AU  - Abazović, Nadica
AU  - Vukovic, Nikola
AU  - Kremenović, Aleksandar S.
AU  - Matović, Branko
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5684
AB  - Mechanical activation of precursors has been used for the preparation of Cr-doped sphene ceramic pigments (CaTi1-yCrySiO5). Ceramic material has been prepared from a powder mixture of CaCO3, TiO2, SiO2 and Cr(NO3)center dot 9H(2)O using vibro-milling for homogenization and activation of precursors. The mechanochemical process initially yielded amorphous powders, which on further calcination, crystallized to yield Cr-doped sphene ceramic pigment. Phase evolution in CaTi1-yCrySiO5 composition with thermal treatment was investigated by X-ray powder diffraction (XRPD). Texture properties and particle size distribution were analyzed by scanning electron microscopy (SEM) and laser diffraction, respectively. UV/Vis reflectance spectra are used to determinate the behavior of the chromium ion. The color efficiency of pigments was evaluated by colorimetric analysis (CIE L * a * b system). Photoluminescence measurements were also performed. (c) 2013 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation
VL  - 579
SP  - 290
EP  - 294
DO  - 10.1016/j.jallcom.2013.06.046
ER  - 
@article{
author = "Pantić, Jelena R. and Prekajski, Marija D. and Dramićanin, Miroslav and Abazović, Nadica and Vukovic, Nikola and Kremenović, Aleksandar S. and Matović, Branko",
year = "2013",
abstract = "Mechanical activation of precursors has been used for the preparation of Cr-doped sphene ceramic pigments (CaTi1-yCrySiO5). Ceramic material has been prepared from a powder mixture of CaCO3, TiO2, SiO2 and Cr(NO3)center dot 9H(2)O using vibro-milling for homogenization and activation of precursors. The mechanochemical process initially yielded amorphous powders, which on further calcination, crystallized to yield Cr-doped sphene ceramic pigment. Phase evolution in CaTi1-yCrySiO5 composition with thermal treatment was investigated by X-ray powder diffraction (XRPD). Texture properties and particle size distribution were analyzed by scanning electron microscopy (SEM) and laser diffraction, respectively. UV/Vis reflectance spectra are used to determinate the behavior of the chromium ion. The color efficiency of pigments was evaluated by colorimetric analysis (CIE L * a * b system). Photoluminescence measurements were also performed. (c) 2013 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation",
volume = "579",
pages = "290-294",
doi = "10.1016/j.jallcom.2013.06.046"
}
Pantić, J. R., Prekajski, M. D., Dramićanin, M., Abazović, N., Vukovic, N., Kremenović, A. S.,& Matović, B.. (2013). Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation. in Journal of Alloys and Compounds, 579, 290-294.
https://doi.org/10.1016/j.jallcom.2013.06.046
Pantić JR, Prekajski MD, Dramićanin M, Abazović N, Vukovic N, Kremenović AS, Matović B. Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation. in Journal of Alloys and Compounds. 2013;579:290-294.
doi:10.1016/j.jallcom.2013.06.046 .
Pantić, Jelena R., Prekajski, Marija D., Dramićanin, Miroslav, Abazović, Nadica, Vukovic, Nikola, Kremenović, Aleksandar S., Matović, Branko, "Preparation and characterization of chrome doped sphene pigments prepared via precursor mechanochemical activation" in Journal of Alloys and Compounds, 579 (2013):290-294,
https://doi.org/10.1016/j.jallcom.2013.06.046 . .
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6

Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution

Prekajski, Marija D.; Fruth, Viktor; Andronescu, Cristian; Trandafilović, Lidija V.; Pantić, Jelena R.; Kremenović, Aleksandar S.; Matović, Branko

(2013)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Fruth, Viktor
AU  - Andronescu, Cristian
AU  - Trandafilović, Lidija V.
AU  - Pantić, Jelena R.
AU  - Kremenović, Aleksandar S.
AU  - Matović, Branko
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5678
AB  - Single phase solid solution Ce1-xBixO2-delta with the composition of x = 0.1-0.5 were successfully synthesized at room temperature using simple and fast Self Propagating Room Temperature procedure (SPRT). Thermal stability of these solid solutions with different concentration of Bi cation was investigated at various temperatures up to 1400 degrees C by applying thermogravimetric analysis (DTA/DTG/TG). Powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and Infra Red spectroscopy (IR). It was revealed that all samples with concentration of bismuth higher than 10 at.% are unstable during thermal treatment, resulting in Bi leaving the structure of ceria and formation of beta-Bi2O3 as second phase. Moreover, at a certain temperatures bismuth begins to evaporate. (c) 2013 Elsevier B. V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution
VL  - 578
SP  - 26
EP  - 31
DO  - 10.1016/j.jallcom.2013.05.006
ER  - 
@article{
author = "Prekajski, Marija D. and Fruth, Viktor and Andronescu, Cristian and Trandafilović, Lidija V. and Pantić, Jelena R. and Kremenović, Aleksandar S. and Matović, Branko",
year = "2013",
abstract = "Single phase solid solution Ce1-xBixO2-delta with the composition of x = 0.1-0.5 were successfully synthesized at room temperature using simple and fast Self Propagating Room Temperature procedure (SPRT). Thermal stability of these solid solutions with different concentration of Bi cation was investigated at various temperatures up to 1400 degrees C by applying thermogravimetric analysis (DTA/DTG/TG). Powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and Infra Red spectroscopy (IR). It was revealed that all samples with concentration of bismuth higher than 10 at.% are unstable during thermal treatment, resulting in Bi leaving the structure of ceria and formation of beta-Bi2O3 as second phase. Moreover, at a certain temperatures bismuth begins to evaporate. (c) 2013 Elsevier B. V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution",
volume = "578",
pages = "26-31",
doi = "10.1016/j.jallcom.2013.05.006"
}
Prekajski, M. D., Fruth, V., Andronescu, C., Trandafilović, L. V., Pantić, J. R., Kremenović, A. S.,& Matović, B.. (2013). Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution. in Journal of Alloys and Compounds, 578, 26-31.
https://doi.org/10.1016/j.jallcom.2013.05.006
Prekajski MD, Fruth V, Andronescu C, Trandafilović LV, Pantić JR, Kremenović AS, Matović B. Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution. in Journal of Alloys and Compounds. 2013;578:26-31.
doi:10.1016/j.jallcom.2013.05.006 .
Prekajski, Marija D., Fruth, Viktor, Andronescu, Cristian, Trandafilović, Lidija V., Pantić, Jelena R., Kremenović, Aleksandar S., Matović, Branko, "Thermal stability of Ce1-xBixO2-delta (x=0.1-0.5) solid solution" in Journal of Alloys and Compounds, 578 (2013):26-31,
https://doi.org/10.1016/j.jallcom.2013.05.006 . .
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