TY  - JOUR
AU  - Cherkezova-Zheleva, Zara
AU  - Paneva, Daniela
AU  - Encheva, Elzhana
AU  - Tsvetkov, Martin
AU  - Krstić, Jugoslav
AU  - Grilli, Maria Luisa
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5621
AB  - The possibility to reuse damaged Fe-based metallic glasses with heterogeneities in their amorphous structure for wastewater remediation is investigated. Fe81B13.5Si3.5C2 ribbons are treated in a planetary ball mill in order to improve their catalytic behavior. Their efficiency in model Fenton reaction of Methyl orange azo-dye degradation is registered. It reveals significant variations of their performance as a result of material transformation under mechanical treatment. Detailed physicochemical analysis is made to follow material changes after ball milling and catalytic tests. It is obtained that the formation of local atomic Fe-rich and Fe-deficit clusters randomly distributed in the amorphous alloy is highly beneficial for increasing catalyst dye degradation ability. Catalytically active centers in studied redox reaction are Fe-rich clusters due to their strong affinity for donating electrons. Additional important result of this study is that mechanochemical treatment of metallic glasses at appropriate conditions can lead to material homogenization and relaxation of amorphous structure, as it can be observed after temperature annealing. This study demonstrates the possibility to apply mechanochemical method for rearrangement of the amorphous structure of damaged metallic glasses. Such waste materials can be in fact successfully reused as green and sustainable catalysts for effective purification of contaminated industrial waters.
PB  - Wiley
T2  - physica status solidi (a)
T1  - Application of Mechanochemically Treated Waste Materials for Water Remediation
VL  - 219
IS  - 15
SP  - 2100515
DO  - 10.1002/pssa.202100515
ER  - 

@article{
author = "Cherkezova-Zheleva, Zara and Paneva, Daniela and Encheva, Elzhana and Tsvetkov, Martin and Krstić, Jugoslav and Grilli, Maria Luisa",
year = "2022",
abstract = "The possibility to reuse damaged Fe-based metallic glasses with heterogeneities in their amorphous structure for wastewater remediation is investigated. Fe81B13.5Si3.5C2 ribbons are treated in a planetary ball mill in order to improve their catalytic behavior. Their efficiency in model Fenton reaction of Methyl orange azo-dye degradation is registered. It reveals significant variations of their performance as a result of material transformation under mechanical treatment. Detailed physicochemical analysis is made to follow material changes after ball milling and catalytic tests. It is obtained that the formation of local atomic Fe-rich and Fe-deficit clusters randomly distributed in the amorphous alloy is highly beneficial for increasing catalyst dye degradation ability. Catalytically active centers in studied redox reaction are Fe-rich clusters due to their strong affinity for donating electrons. Additional important result of this study is that mechanochemical treatment of metallic glasses at appropriate conditions can lead to material homogenization and relaxation of amorphous structure, as it can be observed after temperature annealing. This study demonstrates the possibility to apply mechanochemical method for rearrangement of the amorphous structure of damaged metallic glasses. Such waste materials can be in fact successfully reused as green and sustainable catalysts for effective purification of contaminated industrial waters.",
publisher = "Wiley",
journal = "physica status solidi (a)",
title = "Application of Mechanochemically Treated Waste Materials for Water Remediation",
volume = "219",
number = "15",
pages = "2100515",
doi = "10.1002/pssa.202100515"
}

Cherkezova-Zheleva, Z., Paneva, D., Encheva, E., Tsvetkov, M., Krstić, J.,& Grilli, M. L.. (2022). Application of Mechanochemically Treated Waste Materials for Water Remediation. in physica status solidi (a)
Wiley., 219(15), 2100515.
https://doi.org/10.1002/pssa.202100515

Cherkezova-Zheleva Z, Paneva D, Encheva E, Tsvetkov M, Krstić J, Grilli ML. Application of Mechanochemically Treated Waste Materials for Water Remediation. in physica status solidi (a). 2022;219(15):2100515.
doi:10.1002/pssa.202100515 .

Cherkezova-Zheleva, Zara, Paneva, Daniela, Encheva, Elzhana, Tsvetkov, Martin, Krstić, Jugoslav, Grilli, Maria Luisa, "Application of Mechanochemically Treated Waste Materials for Water Remediation" in physica status solidi (a), 219, no. 15 (2022):2100515,
https://doi.org/10.1002/pssa.202100515 . .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Rožić, Ljiljana
AU  - Grbić, Boško
AU  - Radić, Nenad
AU  - Cherkezova-Zheleva, Zara
AU  - Stojadinović, Stevan
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5688
AB  - The LaTi0.4Mg0.4Fe0.2O3 perovskite was synthesized using a mechanochemical process followed by high-temperature annealing at 600 and 800 ​°C. The effects of milling time and annealing temperature on structural, microstructural changes and optical properties were examined. The photocatalytic activity of LaTi0.4Mg0.4Fe0.2O3 perovskite was evaluated through the photodegradation of methyl orange and methylene blue dyes under UV light irradiation. The results showed that the annealing temperature performed an important role in the crystallite size, crystalline degree, photoluminescence, and band gaps of the LaTi0.4Mg0.4Fe0.2O3 samples. The temperature of annealing had a profound influence on the photocatalytic activities of the LaTi0.4Mg0.4Fe0.2O3 perovskite in the single and binary dye system. The highest photocatalytic activity for methyl orange degradation showed the LaTi0.4Mg0.4Fe0.2O3 annealed at 800 ​°C, while not annealed sample, show the highest activity for degradation of methylene blue. The maximum efficiency of methylene blue photodegradation in individual and binary mixtures was observed over non-annealed perovskite at the same irradiation times. The photodegradation of methylene blue and methyl orange on the LaTi0.4Mg0.4Fe0.2O3 followed a pseudo-first-order kinetic process.
PB  - Elsevier
T2  - Journal of Solid State Chemistry
T1  - Structural, optical and photocatalytic properties of LaTi0.4Mg0.4Fe0.2O3 perovskite prepared by high-energy ball milling
VL  - 297
SP  - 122085
DO  - 10.1016/j.jssc.2021.122085
ER  - 

@article{
author = "Petrović, Srđan and Rožić, Ljiljana and Grbić, Boško and Radić, Nenad and Cherkezova-Zheleva, Zara and Stojadinović, Stevan",
year = "2021",
abstract = "The LaTi0.4Mg0.4Fe0.2O3 perovskite was synthesized using a mechanochemical process followed by high-temperature annealing at 600 and 800 ​°C. The effects of milling time and annealing temperature on structural, microstructural changes and optical properties were examined. The photocatalytic activity of LaTi0.4Mg0.4Fe0.2O3 perovskite was evaluated through the photodegradation of methyl orange and methylene blue dyes under UV light irradiation. The results showed that the annealing temperature performed an important role in the crystallite size, crystalline degree, photoluminescence, and band gaps of the LaTi0.4Mg0.4Fe0.2O3 samples. The temperature of annealing had a profound influence on the photocatalytic activities of the LaTi0.4Mg0.4Fe0.2O3 perovskite in the single and binary dye system. The highest photocatalytic activity for methyl orange degradation showed the LaTi0.4Mg0.4Fe0.2O3 annealed at 800 ​°C, while not annealed sample, show the highest activity for degradation of methylene blue. The maximum efficiency of methylene blue photodegradation in individual and binary mixtures was observed over non-annealed perovskite at the same irradiation times. The photodegradation of methylene blue and methyl orange on the LaTi0.4Mg0.4Fe0.2O3 followed a pseudo-first-order kinetic process.",
publisher = "Elsevier",
journal = "Journal of Solid State Chemistry",
title = "Structural, optical and photocatalytic properties of LaTi0.4Mg0.4Fe0.2O3 perovskite prepared by high-energy ball milling",
volume = "297",
pages = "122085",
doi = "10.1016/j.jssc.2021.122085"
}

Petrović, S., Rožić, L., Grbić, B., Radić, N., Cherkezova-Zheleva, Z.,& Stojadinović, S.. (2021). Structural, optical and photocatalytic properties of LaTi0.4Mg0.4Fe0.2O3 perovskite prepared by high-energy ball milling. in Journal of Solid State Chemistry
Elsevier., 297, 122085.
https://doi.org/10.1016/j.jssc.2021.122085

Petrović S, Rožić L, Grbić B, Radić N, Cherkezova-Zheleva Z, Stojadinović S. Structural, optical and photocatalytic properties of LaTi0.4Mg0.4Fe0.2O3 perovskite prepared by high-energy ball milling. in Journal of Solid State Chemistry. 2021;297:122085.
doi:10.1016/j.jssc.2021.122085 .

Petrović, Srđan, Rožić, Ljiljana, Grbić, Boško, Radić, Nenad, Cherkezova-Zheleva, Zara, Stojadinović, Stevan, "Structural, optical and photocatalytic properties of LaTi0.4Mg0.4Fe0.2O3 perovskite prepared by high-energy ball milling" in Journal of Solid State Chemistry, 297 (2021):122085,
https://doi.org/10.1016/j.jssc.2021.122085 . .

TY  - JOUR
AU  - Banic, Nemanja
AU  - Abramović, Biljana F.
AU  - Krstić, Jugoslav
AU  - Sojic, Daniela
AU  - Lončarević, Davor
AU  - Cherkezova-Zheleva, Zara
AU  - Guzsvány, Valéria
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/849
AB  - Three Fe/TiO2 photocatalysts with different content of Fe (1.9, 7.2 and 13.9%, w/w) were synthesized by a simple deposition-precipitation method and characterized by XRD, SEM, N-2 physisorption at 77K and Mossbauer spectroscopy. The characterization showed the presence of nano-sized Fe2O3 particles (less than 4 nm) on the TiO2 support. The photocatalytic efficiency of the catalysts was examined on the example of thiacloprid (TCL) degradation under UV light irradiation in aqueous suspension in the presence/absence of H2O2. Since the efficiency of TCL degradation in the presence of H2O2 (heterogeneous photo-Fenton process) was more than two times higher, all other investigations were conducted in the presence of H2O2. The photocatalyst with 7.2%, w/w Fe (denoted as 7.2Fe/TiO2) appeared to be most efficient. The photocatalytic degradation studied under different operating conditions indicated that 0.5 g L-1 of 7.2Fe/TiO2 was an optimal catalyst loading, and the optimal pH was 2.8. In the investigated range of initial concentrations of TCL (0.06-0.32 mM) the photocatalytic degradation in the first stage of the reaction followed approximately a pseudo-first order kinetics. The suspended Fe/TiO2 spontaneously precipitated once the stirring of the reaction mixture was terminated (>90% after 15 min). The results clearly demonstrated that 7.2Fe/TiO2 was stable and resistant to photocorrosion during the photocatalytic degradation of TCL The higher efficiency of 7.2Fe/TiO2 compared to Degussa P25 under the optimal experimental conditions of TCL photodegradation, spontaneous precipitation of the suspension, possibility of reusing the catalyst, as well as an insignificant increase in the iron concentration in water solution, all this indicates the possibility of the practical application of this photocatalyst for water treatment.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - Photodegradation of thiacloprid using Fe/TiO2 as a heterogeneous photo-Fenton catalyst
VL  - 107
IS  - 3-4
SP  - 363
EP  - 371
DO  - 10.1016/j.apcatb.2011.07.037
ER  - 

@article{
author = "Banic, Nemanja and Abramović, Biljana F. and Krstić, Jugoslav and Sojic, Daniela and Lončarević, Davor and Cherkezova-Zheleva, Zara and Guzsvány, Valéria",
year = "2011",
abstract = "Three Fe/TiO2 photocatalysts with different content of Fe (1.9, 7.2 and 13.9%, w/w) were synthesized by a simple deposition-precipitation method and characterized by XRD, SEM, N-2 physisorption at 77K and Mossbauer spectroscopy. The characterization showed the presence of nano-sized Fe2O3 particles (less than 4 nm) on the TiO2 support. The photocatalytic efficiency of the catalysts was examined on the example of thiacloprid (TCL) degradation under UV light irradiation in aqueous suspension in the presence/absence of H2O2. Since the efficiency of TCL degradation in the presence of H2O2 (heterogeneous photo-Fenton process) was more than two times higher, all other investigations were conducted in the presence of H2O2. The photocatalyst with 7.2%, w/w Fe (denoted as 7.2Fe/TiO2) appeared to be most efficient. The photocatalytic degradation studied under different operating conditions indicated that 0.5 g L-1 of 7.2Fe/TiO2 was an optimal catalyst loading, and the optimal pH was 2.8. In the investigated range of initial concentrations of TCL (0.06-0.32 mM) the photocatalytic degradation in the first stage of the reaction followed approximately a pseudo-first order kinetics. The suspended Fe/TiO2 spontaneously precipitated once the stirring of the reaction mixture was terminated (>90% after 15 min). The results clearly demonstrated that 7.2Fe/TiO2 was stable and resistant to photocorrosion during the photocatalytic degradation of TCL The higher efficiency of 7.2Fe/TiO2 compared to Degussa P25 under the optimal experimental conditions of TCL photodegradation, spontaneous precipitation of the suspension, possibility of reusing the catalyst, as well as an insignificant increase in the iron concentration in water solution, all this indicates the possibility of the practical application of this photocatalyst for water treatment.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "Photodegradation of thiacloprid using Fe/TiO2 as a heterogeneous photo-Fenton catalyst",
volume = "107",
number = "3-4",
pages = "363-371",
doi = "10.1016/j.apcatb.2011.07.037"
}

Banic, N., Abramović, B. F., Krstić, J., Sojic, D., Lončarević, D., Cherkezova-Zheleva, Z.,& Guzsvány, V.. (2011). Photodegradation of thiacloprid using Fe/TiO2 as a heterogeneous photo-Fenton catalyst. in Applied Catalysis B-Environmental
Elsevier., 107(3-4), 363-371.
https://doi.org/10.1016/j.apcatb.2011.07.037

Banic N, Abramović BF, Krstić J, Sojic D, Lončarević D, Cherkezova-Zheleva Z, Guzsvány V. Photodegradation of thiacloprid using Fe/TiO2 as a heterogeneous photo-Fenton catalyst. in Applied Catalysis B-Environmental. 2011;107(3-4):363-371.
doi:10.1016/j.apcatb.2011.07.037 .

Banic, Nemanja, Abramović, Biljana F., Krstić, Jugoslav, Sojic, Daniela, Lončarević, Davor, Cherkezova-Zheleva, Zara, Guzsvány, Valéria, "Photodegradation of thiacloprid using Fe/TiO2 as a heterogeneous photo-Fenton catalyst" in Applied Catalysis B-Environmental, 107, no. 3-4 (2011):363-371,
https://doi.org/10.1016/j.apcatb.2011.07.037 . .