Photocatalytic and magnetic properties of Mg substituted cobalt ferrite

•Photocatalytic and Magnetic properties of Mg doped Cobalt Ferrite is reported.•Bandgap values increased due to the Mg substitution from 1.35 eV to 1.46 eV.•The methylene blue dye degradation rate shows high efficiency up to 84.5%.•An effective candidate for memory storage applications and efficient...

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Published in:Materials science & engineering. B, Solid-state materials for advanced technology Solid-state materials for advanced technology, 2022-12, Vol.286, p.116030, Article 116030
Main Authors: Shobana, M.K., Nandhini, G., Kavita, S., Suresh Kumar, V., Pazhanivel, T.
Format: Article
Language:English
Subjects:
Cobalt ferrite
Cobalt ferrites
Crystallites
Energy gap
Energy value
Field emission microscopy
Magnesium
Magnetic properties
Magnetic saturation
Magnetic storage
Materials substitution
Methylene blue
Photocatalysis
Sol-gel processes
Spinel ferrites
Synthesis
Thermal stability
VSM
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Summary:•Photocatalytic and Magnetic properties of Mg doped Cobalt Ferrite is reported.•Bandgap values increased due to the Mg substitution from 1.35 eV to 1.46 eV.•The methylene blue dye degradation rate shows high efficiency up to 84.5%.•An effective candidate for memory storage applications and efficient photocatalyst. Single-phase magnesium doped cobalt ferrites have been synthesized by the sol–gel combustion technique. The structural investigations of Co1−xMgxFe2O4 (x = 0.25, 0.5, and 0.75) confirm the single-phase cubic spinel structure with an average crystallite size of 38.96, 34.62, and 32.94 nm, respectively. Cubic morphology is observed by the field emission scanning electron microscopy (FE-SEM). The direct bandgap energy values are calculated by Tauc’s plot and it reveals the increase in bandgap values from 1.35 to 1.46 eV with Mg substitution. The thermal stability showed residue of 97.14 %, 95 %, and 96.95 % for x = 0.25, 0.5, and 0.75, respectively. The magnetic behavior of the samples exhibited a decrease in saturation magnetization (Ms) from 62.88 to 51.1 emu/g to 51.1 emu/g with Mg substitution. The photocatalytic study has been carried out with methylene blue dye and exhibits higher efficiency up to 84.5 % of degradation. The synthesized nanoferrite can be an ideal candidate for magnetic storage applications and an efficient photocatalyst.
ISSN:0921-5107
1873-4944
DOI:10.1016/j.mseb.2022.116030