TY  - JOUR
AU  - Lazarević, Zorica Ž.
AU  - Jovalekić, Čedomir
AU  - Ivanovski, Valentin N.
AU  - Recnik, Aleksander
AU  - Milutinovic, Aleksandra
AU  - Cekić, Božidar Đ.
AU  - Romčević, Nebojša Ž.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6009
AB  - ZnFe2O4 was prepared by a soft mechanochemical route from two starting combinations of powders: (1) Zn(OH)(2)/alpha-Fe2O3 and (2) Zn(OH)(2)/Fe(OH)(3) mixed in a planetary ball mill. The mechanochemical treatment provoked reaction leading to the formation of the ZnFe2O4 spinel phase that was monitored by XRD, TEM, IR and Raman spectroscopy. The spinel phase was first observed after 4 h of milling and its formation was completed after 18 h in both the cases of starting precursors. The synthesized ZnFe2O4 has a nanocrystalline structure with a crystallite size of about 20.3 and 17.6 nm, for the cases (1) and (2), respectively. In the far-infrared reflectivity spectra are seen four active modes. Raman spectra suggest an existence of mixed spinel structure in the obtained nanosamples. In order to confirm phase formation and cation arrangement, Mossbauer measurements were done. Estimated degree of inversion is about 0.58 for both starting mixtures. The magnetic properties of the prepared ZnFe2O4 powders were also studied. The results show that the samples have a typical superparamagnetic-like behavior at room temperature. Higher values of magnetization in the case of samples obtained with starting mixture (2) suggest somewhat higher degree of cation inversion. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Journal of Physics and Chemistry of Solids
T1  - Characterization of partially inverse spinel ZnFe2O4 with high saturation magnetization synthesized via soft mechanochemically assisted route
VL  - 75
IS  - 7
SP  - 869
EP  - 877
DO  - 10.1016/j.jpcs.2014.03.004
ER  - 

@article{
author = "Lazarević, Zorica Ž. and Jovalekić, Čedomir and Ivanovski, Valentin N. and Recnik, Aleksander and Milutinovic, Aleksandra and Cekić, Božidar Đ. and Romčević, Nebojša Ž.",
year = "2014",
abstract = "ZnFe2O4 was prepared by a soft mechanochemical route from two starting combinations of powders: (1) Zn(OH)(2)/alpha-Fe2O3 and (2) Zn(OH)(2)/Fe(OH)(3) mixed in a planetary ball mill. The mechanochemical treatment provoked reaction leading to the formation of the ZnFe2O4 spinel phase that was monitored by XRD, TEM, IR and Raman spectroscopy. The spinel phase was first observed after 4 h of milling and its formation was completed after 18 h in both the cases of starting precursors. The synthesized ZnFe2O4 has a nanocrystalline structure with a crystallite size of about 20.3 and 17.6 nm, for the cases (1) and (2), respectively. In the far-infrared reflectivity spectra are seen four active modes. Raman spectra suggest an existence of mixed spinel structure in the obtained nanosamples. In order to confirm phase formation and cation arrangement, Mossbauer measurements were done. Estimated degree of inversion is about 0.58 for both starting mixtures. The magnetic properties of the prepared ZnFe2O4 powders were also studied. The results show that the samples have a typical superparamagnetic-like behavior at room temperature. Higher values of magnetization in the case of samples obtained with starting mixture (2) suggest somewhat higher degree of cation inversion. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Journal of Physics and Chemistry of Solids",
title = "Characterization of partially inverse spinel ZnFe2O4 with high saturation magnetization synthesized via soft mechanochemically assisted route",
volume = "75",
number = "7",
pages = "869-877",
doi = "10.1016/j.jpcs.2014.03.004"
}

Lazarević, Z. Ž., Jovalekić, Č., Ivanovski, V. N., Recnik, A., Milutinovic, A., Cekić, B. Đ.,& Romčević, N. Ž.. (2014). Characterization of partially inverse spinel ZnFe2O4 with high saturation magnetization synthesized via soft mechanochemically assisted route. in Journal of Physics and Chemistry of Solids, 75(7), 869-877.
https://doi.org/10.1016/j.jpcs.2014.03.004

Lazarević ZŽ, Jovalekić Č, Ivanovski VN, Recnik A, Milutinovic A, Cekić BĐ, Romčević NŽ. Characterization of partially inverse spinel ZnFe2O4 with high saturation magnetization synthesized via soft mechanochemically assisted route. in Journal of Physics and Chemistry of Solids. 2014;75(7):869-877.
doi:10.1016/j.jpcs.2014.03.004 .

Lazarević, Zorica Ž., Jovalekić, Čedomir, Ivanovski, Valentin N., Recnik, Aleksander, Milutinovic, Aleksandra, Cekić, Božidar Đ., Romčević, Nebojša Ž., "Characterization of partially inverse spinel ZnFe2O4 with high saturation magnetization synthesized via soft mechanochemically assisted route" in Journal of Physics and Chemistry of Solids, 75, no. 7 (2014):869-877,
https://doi.org/10.1016/j.jpcs.2014.03.004 . .

TY  - JOUR
AU  - Jevtic, Sanja
AU  - Arcon, Iztok
AU  - Recnik, Aleksander
AU  - Babić, Biljana M.
AU  - Mazaj, Matjai
AU  - Pavlović, Jelena
AU  - Matijašević, Danka
AU  - Niksic, Miomir
AU  - Rajic, Nevenka
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/82
AB  - Se(IV) and Se(VI) anions are the dominant species of Se existing in aqueous systems. In this study, the iron(III)-modified natural zeolitic tuff (Fe-CLI) from the Serbian deposit Zlatokop has been investigated as an adsorbent for the Se oxyanions. Fe-CLI shows adsorption activity for both Se(IV) and Se(VI) which decreases with increasing pH. The adsorption capacity of Fe-CLI is found to be higher for Se(IV) than for Se(VI). Kinetics data follow the pseudo-second-order model and the obtained parameters k indicate that the rates of adsorption and desorption are higher for Se(VI). Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) analyses reveal that Se is bound at the zeolite surface forming not only the Se-O-Fe but also Se-O-Si bonds. The adsorption mechanism depends of the type of oxo ions. Samples of zeolitic tuff which contain Se were tested as soil supplements for the cultivation of Pleurotus ostreatus mushrooms. The fungus adsorbed the inorganic Se from zeolitic tuff transforming it to a more valuable organically bound form. (C) 2014 Published by Elsevier Inc.
T2  - Microporous and Mesoporous Materials
T1  - The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions
VL  - 197
SP  - 92
EP  - 100
DO  - 10.1016/j.micromeso.2014.06.008
ER  - 

@article{
author = "Jevtic, Sanja and Arcon, Iztok and Recnik, Aleksander and Babić, Biljana M. and Mazaj, Matjai and Pavlović, Jelena and Matijašević, Danka and Niksic, Miomir and Rajic, Nevenka",
year = "2014",
abstract = "Se(IV) and Se(VI) anions are the dominant species of Se existing in aqueous systems. In this study, the iron(III)-modified natural zeolitic tuff (Fe-CLI) from the Serbian deposit Zlatokop has been investigated as an adsorbent for the Se oxyanions. Fe-CLI shows adsorption activity for both Se(IV) and Se(VI) which decreases with increasing pH. The adsorption capacity of Fe-CLI is found to be higher for Se(IV) than for Se(VI). Kinetics data follow the pseudo-second-order model and the obtained parameters k indicate that the rates of adsorption and desorption are higher for Se(VI). Extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) analyses reveal that Se is bound at the zeolite surface forming not only the Se-O-Fe but also Se-O-Si bonds. The adsorption mechanism depends of the type of oxo ions. Samples of zeolitic tuff which contain Se were tested as soil supplements for the cultivation of Pleurotus ostreatus mushrooms. The fungus adsorbed the inorganic Se from zeolitic tuff transforming it to a more valuable organically bound form. (C) 2014 Published by Elsevier Inc.",
journal = "Microporous and Mesoporous Materials",
title = "The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions",
volume = "197",
pages = "92-100",
doi = "10.1016/j.micromeso.2014.06.008"
}

Jevtic, S., Arcon, I., Recnik, A., Babić, B. M., Mazaj, M., Pavlović, J., Matijašević, D., Niksic, M.,& Rajic, N.. (2014). The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions. in Microporous and Mesoporous Materials, 197, 92-100.
https://doi.org/10.1016/j.micromeso.2014.06.008

Jevtic S, Arcon I, Recnik A, Babić BM, Mazaj M, Pavlović J, Matijašević D, Niksic M, Rajic N. The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions. in Microporous and Mesoporous Materials. 2014;197:92-100.
doi:10.1016/j.micromeso.2014.06.008 .

Jevtic, Sanja, Arcon, Iztok, Recnik, Aleksander, Babić, Biljana M., Mazaj, Matjai, Pavlović, Jelena, Matijašević, Danka, Niksic, Miomir, Rajic, Nevenka, "The iron(III)-modified natural zeolitic tuff as an adsorbent and carrier for selenium oxyanions" in Microporous and Mesoporous Materials, 197 (2014):92-100,
https://doi.org/10.1016/j.micromeso.2014.06.008 . .