TY  - CONF
AU  - Krsmanović, Miomir
AU  - Popović, Aleksandar
AU  - Radovanović, Željko
AU  - Marković, Smilja
AU  - Omerašević, Mia
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12309
AB  - Environmental pollution is increasing day by day due to industrial activities. Heavy metals are pollutants of special concern due to their toxicity, persistence, and bioaccumulation in nature. Nickel is a heavy metal that is mostly used in industries because of its anticorrosion behavior. As a consequence, nickel ions are present in the wastewater from mining, electroplating, battery manufacturing and metal finishing industries. Nickel ions are nonbiodegradable, and as such, they are present in surface water. Their high concentrations can have a dangerous impact on human health and aquatic life. In this work, a promising method for the removal of Ni ions from wastewater and their incorporation into a stable crystal structure was described. Ni-exchanged form of LTA zeolite was prepared by the standard procedure of ion exchange. After the ion exchange, powder samples were heated at temperatures of 900 to 1300 ºC in order to obtain a stable crystal structure of Ni-spinel, NiAl2O4. XRF analysis was used to study ion exchange efficiency. Characterization of raw as well as thermally treated powder samples of Ni-exchanged LTA zeolite was conducted by XRPD, DTA/TG, FT-IR and SEM analysis
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Immobilization of nickel ions into stable crystal structures as a promising way for their removal from wastewater
SP  - 29
EP  - 29
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12309
ER  - 

@conference{
author = "Krsmanović, Miomir and Popović, Aleksandar and Radovanović, Željko and Marković, Smilja and Omerašević, Mia",
year = "2023",
abstract = "Environmental pollution is increasing day by day due to industrial activities. Heavy metals are pollutants of special concern due to their toxicity, persistence, and bioaccumulation in nature. Nickel is a heavy metal that is mostly used in industries because of its anticorrosion behavior. As a consequence, nickel ions are present in the wastewater from mining, electroplating, battery manufacturing and metal finishing industries. Nickel ions are nonbiodegradable, and as such, they are present in surface water. Their high concentrations can have a dangerous impact on human health and aquatic life. In this work, a promising method for the removal of Ni ions from wastewater and their incorporation into a stable crystal structure was described. Ni-exchanged form of LTA zeolite was prepared by the standard procedure of ion exchange. After the ion exchange, powder samples were heated at temperatures of 900 to 1300 ºC in order to obtain a stable crystal structure of Ni-spinel, NiAl2O4. XRF analysis was used to study ion exchange efficiency. Characterization of raw as well as thermally treated powder samples of Ni-exchanged LTA zeolite was conducted by XRPD, DTA/TG, FT-IR and SEM analysis",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Immobilization of nickel ions into stable crystal structures as a promising way for their removal from wastewater",
pages = "29-29",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12309"
}

Krsmanović, M., Popović, A., Radovanović, Ž., Marković, S.,& Omerašević, M.. (2023). Immobilization of nickel ions into stable crystal structures as a promising way for their removal from wastewater. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 29-29.
https://hdl.handle.net/21.15107/rcub_vinar_12309

Krsmanović M, Popović A, Radovanović Ž, Marković S, Omerašević M. Immobilization of nickel ions into stable crystal structures as a promising way for their removal from wastewater. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:29-29.
https://hdl.handle.net/21.15107/rcub_vinar_12309 .

Krsmanović, Miomir, Popović, Aleksandar, Radovanović, Željko, Marković, Smilja, Omerašević, Mia, "Immobilization of nickel ions into stable crystal structures as a promising way for their removal from wastewater" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):29-29,
https://hdl.handle.net/21.15107/rcub_vinar_12309 .

TY  - CONF
AU  - Jovanović, Zoran
AU  - Bajuk-Bogdanović, Danica
AU  - Vujković, Milica
AU  - Mravik, Željko
AU  - Jovanović, Sonja
AU  - Marković, Smilja
AU  - Pejčić, Milica
AU  - Holclajtner Antunović, Ivanka
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12783
AB  - Gaining a momentum from newly emerging properties of nanomaterials the further enhancement and integration of various functionalities have been made possible. Also, it became apparent that interaction between nano-objects can provide additional synergy capable of yielding new or significantly improved properties. This particularly applies to the surfaces and interfaces of nanomaterials where the intimate contact between components amplifies possible contributions of interfacial interactions. Since this aspect of interaction-property relation in many nanocomposites is still insufficiently explored, it is of interest to identify to what extent the properties emerge as a result of interaction-based synergy or a co-action of individual components. To address these aspects, we have investigated a nanocomposite of graphene oxide (GO) and 12-tungstophosporic acid (WPA) – a combination of materials that are known for the rich “portfolio” of properties. In the talk the novel findings will be presented that contribute to better the understanding of interactions between nano-objects and how they contribute to novel properties. The results are showing how simple temperature treatment and weight ratio of components is influencing the evolution of surface, structural properties and charge storage properties – all closely connected to interactions between components. Finally, the implications on synthetic approaches and fine-tuning of the functionality of GO/WPA nanocomposites will be discussed from the perspective of the obtained results.
PB  - Belgrade : University of Belgrade, Faculty of Physical Chemistry
C3  - COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts
T1  - The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites
SP  - 16
EP  - 16
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12783
ER  - 

@conference{
author = "Jovanović, Zoran and Bajuk-Bogdanović, Danica and Vujković, Milica and Mravik, Željko and Jovanović, Sonja and Marković, Smilja and Pejčić, Milica and Holclajtner Antunović, Ivanka",
year = "2022",
abstract = "Gaining a momentum from newly emerging properties of nanomaterials the further enhancement and integration of various functionalities have been made possible. Also, it became apparent that interaction between nano-objects can provide additional synergy capable of yielding new or significantly improved properties. This particularly applies to the surfaces and interfaces of nanomaterials where the intimate contact between components amplifies possible contributions of interfacial interactions. Since this aspect of interaction-property relation in many nanocomposites is still insufficiently explored, it is of interest to identify to what extent the properties emerge as a result of interaction-based synergy or a co-action of individual components. To address these aspects, we have investigated a nanocomposite of graphene oxide (GO) and 12-tungstophosporic acid (WPA) – a combination of materials that are known for the rich “portfolio” of properties. In the talk the novel findings will be presented that contribute to better the understanding of interactions between nano-objects and how they contribute to novel properties. The results are showing how simple temperature treatment and weight ratio of components is influencing the evolution of surface, structural properties and charge storage properties – all closely connected to interactions between components. Finally, the implications on synthetic approaches and fine-tuning of the functionality of GO/WPA nanocomposites will be discussed from the perspective of the obtained results.",
publisher = "Belgrade : University of Belgrade, Faculty of Physical Chemistry",
journal = "COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts",
title = "The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites",
pages = "16-16",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12783"
}

Jovanović, Z., Bajuk-Bogdanović, D., Vujković, M., Mravik, Ž., Jovanović, S., Marković, S., Pejčić, M.,& Holclajtner Antunović, I.. (2022). The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites. in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts
Belgrade : University of Belgrade, Faculty of Physical Chemistry., 16-16.
https://hdl.handle.net/21.15107/rcub_vinar_12783

Jovanović Z, Bajuk-Bogdanović D, Vujković M, Mravik Ž, Jovanović S, Marković S, Pejčić M, Holclajtner Antunović I. The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites. in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts. 2022;:16-16.
https://hdl.handle.net/21.15107/rcub_vinar_12783 .

Jovanović, Zoran, Bajuk-Bogdanović, Danica, Vujković, Milica, Mravik, Željko, Jovanović, Sonja, Marković, Smilja, Pejčić, Milica, Holclajtner Antunović, Ivanka, "The Role of Surface Chemistry, Structure and Interactions in the Electrochemical Charge Storage Properties of Graphene Oxide and 12-tungstophoshoric Acid Nanocomposites" in COIN2022 : Contemporary batteries and supercapacitors : Program and book of abstracts (2022):16-16,
https://hdl.handle.net/21.15107/rcub_vinar_12783 .

TY  - JOUR
AU  - Veselinović, Ljiljana
AU  - Mitrić, Miodrag
AU  - Mančić, Lidija
AU  - Jardim, Paula M.
AU  - Škapin, Srečo Davor
AU  - Cvjetićanin, Nikola
AU  - Milović, Miloš D.
AU  - Marković, Smilja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12382
AB  - This paper reports a detailed study of crystal structure and dielectric properties of ruthenium-substituted calcium-copper titanates (CaCu3Ti4−xRuxO12, CCTRO). A series of three samples with different stoichiometry was prepared: CaCu3Ti4−xRuxO12, x = 0, 1 and 4, abbreviated as CCTO, CCT3RO and CCRO, respectively. A detailed structural analysis of CCTRO samples was done by the Rietveld refinement of XRPD data. The results show that, regardless of whether Ti4+ or Ru4+ ions are placed in B crystallographic position in AA’3B4O12 (CaCu3Ti4−xRuxO12) unit cell, the crystal structure remains cubic with Im3¯ symmetry. Slight increases in the unit cell parameters, cell volume and interatomic distances indicate that Ru4+ ions with larger ionic radii (0.62 Å) than Ti4+ (0.605 Å) are incorporated in the CaCu3Ti4−xRuxO12 crystal lattice. The structural investigations were confirmed using TEM, HRTEM and ADF/STEM analyses, including EDXS elemental mapping. The effect of Ru atoms share in CaCu3Ti4−xRuxO12 samples on their electrical properties was determined by impedance and dielectric measurements. Results of dielectric measurements indicate that one atom of ruthenium per CaCu3Ti4−xRuxO12 unit cell transforms dielectric CCTO into conductive CCT3RO while preserving cubic crystal structure. Our findings about CCTO and CCT3RO ceramics promote them as ideal tandem to overcome the problem of stress on dielectric-electrode interfaces in capacitors.
T2  - Materials
T1  - Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate
VL  - 15
IS  - 23
SP  - 8500
SP  - 8500
DO  - 10.3390/ma15238500
ER  - 

@article{
author = "Veselinović, Ljiljana and Mitrić, Miodrag and Mančić, Lidija and Jardim, Paula M. and Škapin, Srečo Davor and Cvjetićanin, Nikola and Milović, Miloš D. and Marković, Smilja",
year = "2022",
abstract = "This paper reports a detailed study of crystal structure and dielectric properties of ruthenium-substituted calcium-copper titanates (CaCu3Ti4−xRuxO12, CCTRO). A series of three samples with different stoichiometry was prepared: CaCu3Ti4−xRuxO12, x = 0, 1 and 4, abbreviated as CCTO, CCT3RO and CCRO, respectively. A detailed structural analysis of CCTRO samples was done by the Rietveld refinement of XRPD data. The results show that, regardless of whether Ti4+ or Ru4+ ions are placed in B crystallographic position in AA’3B4O12 (CaCu3Ti4−xRuxO12) unit cell, the crystal structure remains cubic with Im3¯ symmetry. Slight increases in the unit cell parameters, cell volume and interatomic distances indicate that Ru4+ ions with larger ionic radii (0.62 Å) than Ti4+ (0.605 Å) are incorporated in the CaCu3Ti4−xRuxO12 crystal lattice. The structural investigations were confirmed using TEM, HRTEM and ADF/STEM analyses, including EDXS elemental mapping. The effect of Ru atoms share in CaCu3Ti4−xRuxO12 samples on their electrical properties was determined by impedance and dielectric measurements. Results of dielectric measurements indicate that one atom of ruthenium per CaCu3Ti4−xRuxO12 unit cell transforms dielectric CCTO into conductive CCT3RO while preserving cubic crystal structure. Our findings about CCTO and CCT3RO ceramics promote them as ideal tandem to overcome the problem of stress on dielectric-electrode interfaces in capacitors.",
journal = "Materials",
title = "Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate",
volume = "15",
number = "23",
pages = "8500-8500",
doi = "10.3390/ma15238500"
}

Veselinović, L., Mitrić, M., Mančić, L., Jardim, P. M., Škapin, S. D., Cvjetićanin, N., Milović, M. D.,& Marković, S.. (2022). Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate. in Materials, 15(23), 8500.
https://doi.org/10.3390/ma15238500

Veselinović L, Mitrić M, Mančić L, Jardim PM, Škapin SD, Cvjetićanin N, Milović MD, Marković S. Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate. in Materials. 2022;15(23):8500.
doi:10.3390/ma15238500 .

Veselinović, Ljiljana, Mitrić, Miodrag, Mančić, Lidija, Jardim, Paula M., Škapin, Srečo Davor, Cvjetićanin, Nikola, Milović, Miloš D., Marković, Smilja, "Crystal Structure and Electrical Properties of Ruthenium-Substituted Calcium Copper Titanate" in Materials, 15, no. 23 (2022):8500,
https://doi.org/10.3390/ma15238500 . .

TY  - CONF
AU  - Marković, Smilja
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana
AU  - Simić, Danica
AU  - Samolov, Aleksandra
AU  - Stojković Simatović, Ivana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11785
AB  - Radar-absorbent materials, used in stealth technology for defense aircrafts, vehicles, satellites, etc. from radar detection, are commonly based on graphite or semiconductive particles embedded in a polymer matrix. In this study, we employed Co2+ ion-substitution to improve Vis-NIR reflectivity of hydroxyapatite (Ca10(PO4)6(OH)2, HAP) powder. HAP:Co with nominally 5 at.% of Co was prepared with hydrothermal processing of a precipitate. Synthesized powder was characterized by XRD, Raman and ATR-FTIR spectroscopy, FE-SEM and TEM. Thermal stability of HAP:Co powder was examined by simultaneous TG-DTA analyzer. To modify its optical properties and obtain powders with a varietty of color tone, the HAP:Co powder was calcined at 800, 1000, and 1100 °C, in an air atmosphere, for 1 hour. Afterward, the calcined particles were used to prepare composites with poly(vinyl butyral), (PVB); the concentration range was 1 wt.% of the HAP:Co in PVB. The composite coatings, in the form of thin films on glass, were prepared by the solvent-casting technique, using ethanol as a fast evaporating solvent. Firstly, the HAP:Co particles were dispersed in ethanol, then PVB was added (Mowital B30H) and dissolved. To evaporate the solvent before spectrophotometric measurements, the coatings on glass were dried at room temperature for 72 hours. To comprehend optical properties of the coatings, diffuse reflection, transmission, and color coordinates were determined. We found that calcined HAP:Co particles have potential to be used in the formulation of coatings for camouflage protection.
PB  - Belgrade : Military Technical Institute
C3  - OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
T1  - HAp:Co as tunable VIS-NIR reflective pigment
SP  - 475
EP  - 480
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11785
ER  - 

@conference{
author = "Marković, Smilja and Stojanović, Zoran S. and Veselinović, Ljiljana and Simić, Danica and Samolov, Aleksandra and Stojković Simatović, Ivana",
year = "2020",
abstract = "Radar-absorbent materials, used in stealth technology for defense aircrafts, vehicles, satellites, etc. from radar detection, are commonly based on graphite or semiconductive particles embedded in a polymer matrix. In this study, we employed Co2+ ion-substitution to improve Vis-NIR reflectivity of hydroxyapatite (Ca10(PO4)6(OH)2, HAP) powder. HAP:Co with nominally 5 at.% of Co was prepared with hydrothermal processing of a precipitate. Synthesized powder was characterized by XRD, Raman and ATR-FTIR spectroscopy, FE-SEM and TEM. Thermal stability of HAP:Co powder was examined by simultaneous TG-DTA analyzer. To modify its optical properties and obtain powders with a varietty of color tone, the HAP:Co powder was calcined at 800, 1000, and 1100 °C, in an air atmosphere, for 1 hour. Afterward, the calcined particles were used to prepare composites with poly(vinyl butyral), (PVB); the concentration range was 1 wt.% of the HAP:Co in PVB. The composite coatings, in the form of thin films on glass, were prepared by the solvent-casting technique, using ethanol as a fast evaporating solvent. Firstly, the HAP:Co particles were dispersed in ethanol, then PVB was added (Mowital B30H) and dissolved. To evaporate the solvent before spectrophotometric measurements, the coatings on glass were dried at room temperature for 72 hours. To comprehend optical properties of the coatings, diffuse reflection, transmission, and color coordinates were determined. We found that calcined HAP:Co particles have potential to be used in the formulation of coatings for camouflage protection.",
publisher = "Belgrade : Military Technical Institute",
journal = "OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade",
title = "HAp:Co as tunable VIS-NIR reflective pigment",
pages = "475-480",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11785"
}

Marković, S., Stojanović, Z. S., Veselinović, L., Simić, D., Samolov, A.,& Stojković Simatović, I.. (2020). HAp:Co as tunable VIS-NIR reflective pigment. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade
Belgrade : Military Technical Institute., 475-480.
https://hdl.handle.net/21.15107/rcub_vinar_11785

Marković S, Stojanović ZS, Veselinović L, Simić D, Samolov A, Stojković Simatović I. HAp:Co as tunable VIS-NIR reflective pigment. in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade. 2020;:475-480.
https://hdl.handle.net/21.15107/rcub_vinar_11785 .

Marković, Smilja, Stojanović, Zoran S., Veselinović, Ljiljana, Simić, Danica, Samolov, Aleksandra, Stojković Simatović, Ivana, "HAp:Co as tunable VIS-NIR reflective pigment" in OTEH’20 : 9th International Scientific Conference on Defensive Technologies : the book of abstracts; Oct 15-16, Belgrade (2020):475-480,
https://hdl.handle.net/21.15107/rcub_vinar_11785 .