4.7 Article

Photocatalytic activity of cobalt substituted zinc ferrite for the degradation of methylene blue dye under visible light irradiation

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JOURNAL OF ALLOYS AND COMPOUNDS
卷 851, 期 -, 页码 -

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ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.156878

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Nanoferrites; XRD; Photocatalytic degradation; Spinel phase; Water purification

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  1. Gurujal, an initiative with district administration Gurugram [176]

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The synthesis and characterization of cobalt-zinc ferrite, as well as its application in photocatalytic degradation of methylene blue, showed that the degradation efficiency increased with an increase in cobalt concentration.
Cobalt-zinc ferrite with composition CoxZn1-xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5) was synthesized using citrate precursor method and the prepared samples were characterized by using X-ray powder diffractometry (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Fourier Transform Infrared Spectroscopy (FT-IR) techniques. Single phase spinel structure was confirmed by the XRD patterns having (311) characteristic peak. SEM images showed the agglomeration of the powdered samples of cobalt-zinc ferrite. TEM images record an average crystallite size of 52 nm. Visible range light was used for the photocatalytic degradation of methylene blue by creating a Fenton-type system. It was observed that the degradation of methylene blue was enhanced with an increase in cobalt concentration. The degradation efficiency reached a maximum (77%) for x = 0.5 while it was the smallest (similar to 65%) for x = 0.0 in 1 h under visible light irradiation. Hence, we conclude that cobalt-zinc ferrite can be used as a potential material for purification of water and its degradation efficiency increased with an increase in cobalt concentration. (C) 2020 Elsevier B.V. All rights reserved.

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