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Pregled bibliografske jedinice broj: 1102834

Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties


Dojčinović, Milena P.; Vasiljević, Zorka Z.; Pavlović, Vera P.; Barišić, Dario; Pajić, Damir; Tadić, Nenad B.; Nikolić, Maria Vesna
Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties // Journal of Alloys and Compounds, 855 (2021), 157429, 11 doi:10.1016/j.jallcom.2020.157429 (međunarodna recenzija, članak, ostalo)


CROSBI ID: 1102834 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties

Autori
Dojčinović, Milena P. ; Vasiljević, Zorka Z. ; Pavlović, Vera P. ; Barišić, Dario ; Pajić, Damir ; Tadić, Nenad B. ; Nikolić, Maria Vesna

Izvornik
Journal of Alloys and Compounds (0925-8388) 855 (2021); 157429, 11

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, ostalo

Ključne riječi
Spinel Ferrites ; Combustion ; Structure ; Photocatalysis ; Magnetic properties

Sažetak
CoxMg1-xFe2O4 (where x was 0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and 1) spinel ferrites were synthesized by the sol-gel combustion method using citric acid as fuel, following the rules of propellant chemistry. Amorphous powders were then calcined at 700 °C for 3 h. Structural analysis by X-Ray diffraction (XRD), FTIR and Raman spectroscopy confirmed the formation of a cubic spinel structure where the cation distribution and inversion degree depended on the Co2+ and Mg2+ ion content. Accordingly, the lattice parameter varied between 8.3703 Å (MgFe2O4) and 8.3919 Å (Co0.9Mg0.1Fe2O4) as did the crystallite size, from 34 nm (Co0.1Mg0.9Fe2O4) to 48 nm (Co0.9Mg0.1Fe2O4). Scanning electron microscopy (SEM) showed the formation of multigrain agglomerates. Determined values of the maximal and remanent magnetization, as well as coercive field, depended on the Co2+ and Mg2+ ion content and increased with substitution of diamagnetic Mg2+ ions with magnetic Co2+ ions. Most impressive is the increase of the coercive field from 74 Oe for MgFe2O4 to 1000 Oe for CoFe2O4, as well as an increase of magnetization in the field of 10 kOe from 27.4 emu g−1 to 75.7 emu g−1. The determined optical band gaps from UV/Vis DRS measurements showed a strong dependence on cation content, morphology, and crystallite size, decreasing from 2.09 eV for MgFe2O4 to 1.42 eV for CoFe2O4. The photocatalytic efficiency of as-synthesized ferrites was investigated by monitoring photocatalytic degradation of Methylene Blue (MB) under natural sunlight, and artificial light source emitting visible light. Different conditions of MB degradation such as photocatalyst loading, molar concentration of MB, and pH values were investigated. Results have shown that under both visible light and natural sunlight, excessive amounts of cobalt retarded the photocatalytic process. Co0.9Mg0.1Fe2O4 showed considerable activity (74.5% after 4 h) that is unexpected but possibly connected to structural anomalies. The best photocatalytic activity under natural sunlight was achieved by MgFe2O4 (82% after 4 h), while the best photocatalytic activity under visible light was achieved by Co0.1Mg0.9Fe2O4 (79% after 4 h).

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija, Interdisciplinarne prirodne znanosti



POVEZANOST RADA


Projekti:
HRZZ-UIP-2014-09-8276 - Magnetoelektrični multiferoični sustavi (FerMaEl) (Pajić, Damir, HRZZ - 2014-09) ( POIROT)

Ustanove:
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Avatar Url Dario Barišić (autor)

Avatar Url Damir Pajić (autor)

Citiraj ovu publikaciju

Dojčinović, Milena P.; Vasiljević, Zorka Z.; Pavlović, Vera P.; Barišić, Dario; Pajić, Damir; Tadić, Nenad B.; Nikolić, Maria Vesna
Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties // Journal of Alloys and Compounds, 855 (2021), 157429, 11 doi:10.1016/j.jallcom.2020.157429 (međunarodna recenzija, članak, ostalo)
Dojčinović, M., Vasiljević, Z., Pavlović, V., Barišić, D., Pajić, D., Tadić, N. & Nikolić, M. (2021) Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties. Journal of Alloys and Compounds, 855, 157429, 11 doi:10.1016/j.jallcom.2020.157429.
@article{article, year = {2021}, pages = {11}, DOI = {10.1016/j.jallcom.2020.157429}, chapter = {157429}, keywords = {Spinel Ferrites, Combustion, Structure, Photocatalysis, Magnetic properties}, journal = {Journal of Alloys and Compounds}, doi = {10.1016/j.jallcom.2020.157429}, volume = {855}, issn = {0925-8388}, title = {Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties}, keyword = {Spinel Ferrites, Combustion, Structure, Photocatalysis, Magnetic properties}, chapternumber = {157429} }
@article{article, year = {2021}, pages = {11}, DOI = {10.1016/j.jallcom.2020.157429}, chapter = {157429}, keywords = {Spinel Ferrites, Combustion, Structure, Photocatalysis, Magnetic properties}, journal = {Journal of Alloys and Compounds}, doi = {10.1016/j.jallcom.2020.157429}, volume = {855}, issn = {0925-8388}, title = {Mixed Mg–Co spinel ferrites: Structure, morphology, magnetic and photocatalytic properties}, keyword = {Spinel Ferrites, Combustion, Structure, Photocatalysis, Magnetic properties}, chapternumber = {157429} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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