Synthesis of Zinc Ferrite and Its Photocatalytic Application under Visible Light

Abstract
ZnFe$_2$O$_4$ with a spinel crystal structure was synthesized by using the solid-state reaction method. A single-phase ZnFe$_2$O$_4$ was obtained in the temperature range of 900 -- 1200 $^circ$C. The as-synthesized particles were agglomerates of crystals with an average size of 51.9 nm, as estimated from X-ray diffraction analysis. The band gap of the n-type semiconducting metal oxide, as determined by using UV-vis diffuse reflectance spectroscopy (UV-DRS) was found to be 1.90 eV (657 nm). The photocatalytic activity of ZnFe$_2$O$_4$ was investigated by using the photo-decomposition of isopropyl alcohol (IPA) under visible light ($geq$$420$ nm) and was found to be much higher than that of the well-known TiO$_{2-x}$N$_x$ photocatalyst.
Keywords: Calcium ferrites, Nano-particles, Polymerized complex method, Visible light, Photocatalytic activity

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