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  - CONF
AU  - Cherkezova-Zheleva, Z.
AU  - Paneva, Daniela
AU  - Petkova, V.
AU  - Krstić, Jugoslav
AU  - Stefanov, G.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3360
AB  - In this paper, the physico chemical properties of Fe–based amorphous alloys containing critical raw materials (CRM) were investigated in order to reuse them for photocatalytic degradation of azo dyes. The iron-based metallic glasses were prepared by melt spinning method. Their chemical composition is: Fe67B14Co18Si, Fe78B15Mo2Si5 and Fe40B16Ni40Mo4. Characterization of the ribbons was done using combination of analytical methods. Studied materials were heated in inert atmosphere and in air at temperature of 1000 °C. Crystallization processes of investigated Fe–based amorphous alloys depending on their chemical composition were registered using thermal analysis. The changes of material phase composition and crystallinity degree were studied using powder X-ray diffraction (XRD) and Mössbauer spectroscopy (MS). The thermal treatment in inert atmosphere above the crystallization temperature of studied amorphous alloys result in rearrangement of iron neighbours and formation of multiphase crystalline structure, which strongly depends on the additive elements (Co, Ni, Mo). Heating of ribbons in air affects significantly the kinetic of crystallization and registered products in comparison to annealing in inert (argon) atmosphere. Investigation of thermal stability of ribbon metallic glasses and formation of different intermediate and product compounds is very important for practical application of damaged amorphous alloys, their further reuse and recycling.
PB  - Springer Science and Business Media LLC
C3  - Hyperfine Interactions
T1  - Reuse of Fe-based amorphous alloys containing CRM: study on their temperature behavior
VL  - 241
IS  - 1
SP  - 14
DO  - 10.1007/s10751-019-1684-6
ER  - 

@conference{
author = "Cherkezova-Zheleva, Z. and Paneva, Daniela and Petkova, V. and Krstić, Jugoslav and Stefanov, G.",
year = "2020",
abstract = "In this paper, the physico chemical properties of Fe–based amorphous alloys containing critical raw materials (CRM) were investigated in order to reuse them for photocatalytic degradation of azo dyes. The iron-based metallic glasses were prepared by melt spinning method. Their chemical composition is: Fe67B14Co18Si, Fe78B15Mo2Si5 and Fe40B16Ni40Mo4. Characterization of the ribbons was done using combination of analytical methods. Studied materials were heated in inert atmosphere and in air at temperature of 1000 °C. Crystallization processes of investigated Fe–based amorphous alloys depending on their chemical composition were registered using thermal analysis. The changes of material phase composition and crystallinity degree were studied using powder X-ray diffraction (XRD) and Mössbauer spectroscopy (MS). The thermal treatment in inert atmosphere above the crystallization temperature of studied amorphous alloys result in rearrangement of iron neighbours and formation of multiphase crystalline structure, which strongly depends on the additive elements (Co, Ni, Mo). Heating of ribbons in air affects significantly the kinetic of crystallization and registered products in comparison to annealing in inert (argon) atmosphere. Investigation of thermal stability of ribbon metallic glasses and formation of different intermediate and product compounds is very important for practical application of damaged amorphous alloys, their further reuse and recycling.",
publisher = "Springer Science and Business Media LLC",
journal = "Hyperfine Interactions",
title = "Reuse of Fe-based amorphous alloys containing CRM: study on their temperature behavior",
volume = "241",
number = "1",
pages = "14",
doi = "10.1007/s10751-019-1684-6"
}

Cherkezova-Zheleva, Z., Paneva, D., Petkova, V., Krstić, J.,& Stefanov, G.. (2020). Reuse of Fe-based amorphous alloys containing CRM: study on their temperature behavior. in Hyperfine Interactions
Springer Science and Business Media LLC., 241(1), 14.
https://doi.org/10.1007/s10751-019-1684-6

Cherkezova-Zheleva Z, Paneva D, Petkova V, Krstić J, Stefanov G. Reuse of Fe-based amorphous alloys containing CRM: study on their temperature behavior. in Hyperfine Interactions. 2020;241(1):14.
doi:10.1007/s10751-019-1684-6 .

Cherkezova-Zheleva, Z., Paneva, Daniela, Petkova, V., Krstić, Jugoslav, Stefanov, G., "Reuse of Fe-based amorphous alloys containing CRM: study on their temperature behavior" in Hyperfine Interactions, 241, no. 1 (2020):14,
https://doi.org/10.1007/s10751-019-1684-6 . .

TY  - CONF
AU  - Dostanić, Jasmina
AU  - Šalipur, Hristina
AU  - Lončarević, Davor
AU  - Paneva, Daniela
AU  - Cherkezova Zheleva, Z.
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6150
PB  - Institute of Physical Chemistry, Bulgarian Academy of Science
C3  - 21st International Workshop on Nanoscience & Nanotechnology
T1  - Enhancement of Photocatalytic Hydrogen Production of Ni Modified Titania/TiO2 Nanostructures by Tuning Structural and Morphological Properties
SP  - 17
EP  - 17
UR  - https://hdl.handle.net/21.15107/rcub_cer_6150
ER  - 

@conference{
author = "Dostanić, Jasmina and Šalipur, Hristina and Lončarević, Davor and Paneva, Daniela and Cherkezova Zheleva, Z.",
year = "2019",
publisher = "Institute of Physical Chemistry, Bulgarian Academy of Science",
journal = "21st International Workshop on Nanoscience & Nanotechnology",
title = "Enhancement of Photocatalytic Hydrogen Production of Ni Modified Titania/TiO2 Nanostructures by Tuning Structural and Morphological Properties",
pages = "17-17",
url = "https://hdl.handle.net/21.15107/rcub_cer_6150"
}

Dostanić, J., Šalipur, H., Lončarević, D., Paneva, D.,& Cherkezova Zheleva, Z.. (2019). Enhancement of Photocatalytic Hydrogen Production of Ni Modified Titania/TiO2 Nanostructures by Tuning Structural and Morphological Properties. in 21st International Workshop on Nanoscience & Nanotechnology
Institute of Physical Chemistry, Bulgarian Academy of Science., 17-17.
https://hdl.handle.net/21.15107/rcub_cer_6150

Dostanić J, Šalipur H, Lončarević D, Paneva D, Cherkezova Zheleva Z. Enhancement of Photocatalytic Hydrogen Production of Ni Modified Titania/TiO2 Nanostructures by Tuning Structural and Morphological Properties. in 21st International Workshop on Nanoscience & Nanotechnology. 2019;:17-17.
https://hdl.handle.net/21.15107/rcub_cer_6150 .

Dostanić, Jasmina, Šalipur, Hristina, Lončarević, Davor, Paneva, Daniela, Cherkezova Zheleva, Z., "Enhancement of Photocatalytic Hydrogen Production of Ni Modified Titania/TiO2 Nanostructures by Tuning Structural and Morphological Properties" in 21st International Workshop on Nanoscience & Nanotechnology (2019):17-17,
https://hdl.handle.net/21.15107/rcub_cer_6150 .

TY  - JOUR
AU  - Petrović, Srđan
AU  - Terlecki-Baričević, Ana V.
AU  - Karanovic, Lj.
AU  - Kirilov-Stefanov, P.
AU  - Zdujić, Miodrag
AU  - Dondur, Vera
AU  - Paneva, Daniela
AU  - Mitov, I.
AU  - Rakić, Vesna M.
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/399
AB  - Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  LT  MF series  LT  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.
PB  - Elsevier
T2  - Applied Catalysis B-Environmental
T1  - LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation
VL  - 79
IS  - 2
SP  - 186
EP  - 198
DO  - 10.1016/j.apcatb.2007.10.022
ER  - 

@article{
author = "Petrović, Srđan and Terlecki-Baričević, Ana V. and Karanovic, Lj. and Kirilov-Stefanov, P. and Zdujić, Miodrag and Dondur, Vera and Paneva, Daniela and Mitov, I. and Rakić, Vesna M.",
year = "2008",
abstract = "Two new series of perovskite-type oxides LaMO3 (M = Mg, Ti, Fe) with different ratio Mg/Fe (MF) and Ti/Fe (TF) in the B cation site were prepared by annealing the precursor, obtained by the mechanochemical activation (MCA) of constituent metal oxides, at 1000 degrees C in air. In addition, two closely related perovskites LaFeO3 (LF) and LaTi0.5Mg0.5O3 (TM (50:50)) were synthesized in the similar way. Using MCA method, perovskites were obtained in rather short time and at room temperature. The samples were characterized by X-ray powder diffraction (XRPD), Xray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), temperature programmed desorption of oxygen (TPD), Mossbauer spectroscopy, BET surface area measurements and tested in methane deep oxidation. According to XRPD analysis all synthesized samples are almost single perovskite phase, with trace amounts of La2O3 phase. Data of Mossbauer spectroscopy identify Fe 31 in octahedral coordination. The activity of perovskite in methane deep oxidation increases in the order TM (50:50)  LT  MF series  LT  TF series. Higher activity of TF samples in respect to MF with similar Fe content can be related to the structural characteristic., mainly to the presence of predominantly most labile oxygen species evidenced by TPD at lowest temperature of oxygen evaluation. In used experimental conditions, the Fe substituted perovskite are thermal stable up to the temperature of 850 degrees C. The stability of Fe active sites is probably the most important parameter responsible for thermal stability of perovskite, but the atomic surface composition also should be taken into account.",
publisher = "Elsevier",
journal = "Applied Catalysis B-Environmental",
title = "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation",
volume = "79",
number = "2",
pages = "186-198",
doi = "10.1016/j.apcatb.2007.10.022"
}

Petrović, S., Terlecki-Baričević, A. V., Karanovic, Lj., Kirilov-Stefanov, P., Zdujić, M., Dondur, V., Paneva, D., Mitov, I.,& Rakić, V. M.. (2008). LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental
Elsevier., 79(2), 186-198.
https://doi.org/10.1016/j.apcatb.2007.10.022

Petrović S, Terlecki-Baričević AV, Karanovic L, Kirilov-Stefanov P, Zdujić M, Dondur V, Paneva D, Mitov I, Rakić VM. LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation. in Applied Catalysis B-Environmental. 2008;79(2):186-198.
doi:10.1016/j.apcatb.2007.10.022 .

Petrović, Srđan, Terlecki-Baričević, Ana V., Karanovic, Lj., Kirilov-Stefanov, P., Zdujić, Miodrag, Dondur, Vera, Paneva, Daniela, Mitov, I., Rakić, Vesna M., "LaMO3 (M = Mg, Ti, Fe) perovskite type oxides: Preparation, characterization and catalytic properties in methane deep oxidation" in Applied Catalysis B-Environmental, 79, no. 2 (2008):186-198,
https://doi.org/10.1016/j.apcatb.2007.10.022 . .