Synthesis, characterizations and the photocatalytic ability of Co1-xZnxFe2O4 spinels prepared by combustion method

Nguyen Xuan Dung; Phan Thi Minh Huyen

doi:10.51316/jca.2021.130

Authors

Nguyen Xuan Dung Faculty of Chemistry, Vinh University
Phan Thi Minh Huyen Faculty of Chemistry, Vinh University

DOI:

https://doi.org/10.51316/jca.2021.130

Keywords:

Co1-xZnxFe2O4, combustion method, spinel ferrites, nanomaterials, photocatalysts

Abstract

In this research, Co_1-xZn_xFe₂O₄ (x=0-0,5) spinel ferrites were synthesized at 500⁰C by combustion method using glycine and metal nitrates. The powder samples were characterized by thermogravimetric and differential thermal analysis (TG-DTA), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX). X-ray analysis showed that all samples have single phase cubic spinel structure. Structural parameters of spinels were also determined from XRD datas. The lattice constants, cell volumes increased with the increase in zinc substitution. The average crystallite sizes of the particles were determined with Zn content from 11 to 16 nm. The TEM images reveals the spherical shapes of nanoparticles with an average particle size less than 20 nm. The photocatalytic activity of the spinels were tested by the degradation of methylene blue (MB) in aqueous solution under visible light. The results showed that Zn doped spinels exhibited higher photocatalytic activity than CoFe₂O₄. Among all the samples, the maximum degradation efficiency was achieved by the 0.4 Zn substituted cobalt ferrite.

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References

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