Abstract
Visible-light-absorbing compounds that generate reactive oxygen species in water are needed to maximize the degradation rate of organic dye under incident solar radiation. In this study, hollow ZnFe2O4 and ZnFe2O4/TiO2 composites were prepared by coprecipitation and microemulsion method, respectively. The structure and morphology of as-prepared samples as well as their magnetic properties and photocatalytic degradation activities on methyl orange and rhodamine B solution were investigated in detail. The results show that ZnFe2O4/TiO2 composites have excellent performance on photocatalytic degradation of dye in wastewater under visible light. Especially, the photocatalytic degradation activity of the composite with ωTiO2 25% on dye in wastewater was comparable to that of pure titanium dioxide (under UV light). Also, all samples show good stability, and are easy to recycle. This work demonstrates a cost-effective, recyclable, environment-friendly and simple way to directly degrade organic dye in wastewater by means of photocatalysis.
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