Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 148, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2020.109700
Keywords
Photocatalysis; Ferrite; Sol-gel method; MB dye
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Cobalt-doped magnetically separable Zn1-xCoxFeMnO4 ferrite nanoparticles were synthesized using the auto-combustion process of sol-gel method. The introduction of cobalt led to changes in crystal structure and magnetic properties.
Cobalt doped magnetically separable Zn1-xCoxFeMnO4 (x = 0.0, 0.25, 0.50, 0.75, 1.0) nanoparticles of ferrite were synthesized using auto-combustion process of sol-gel utilizing glycine as a fuel. The powder XRD and Rietveld refinement studies showed that all of the samples developed a single-phase cubic spinel system. The morphological investigations demonstrate the sphere-like nanostructures, which get distorted after an increase in the concentration of cobalt. A transformation from superparamagnetic activity to ferrimagnetic character has been reported with the introduction of Co2+ . As synthesized ferrite nanoparticles have demonstrated an improvement in coercivity with lower density magnetization with reduced crystallite size. A rise in the remanence ratio were observed with the Co2+ content. The optical characterization shows a blue shift in the band gap with increase of Co2+ . Considering the band structure in the visible region, the photocatalytic activity of assynthesized Zn1-xCoxFeMnO4 photocatalysts for degradation of methylene blue under natural sunlight was investigated. The Zn0.25Co0.75MnFeO4 ferrite demonstrated more than 99% degradation of MB dye within 20 min. The effect of catalyst loading, pH, and stability of photocatalyst were studied.
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