Abstract
A novel Bi0–BiOCl/WO3 Z-type heterojunction photocatalyst was successfully prepared by the solvothermal in-situ reduction method. The material composition, crystal structure, micro morphology and photocatalytic performance of the catalysts were studied. With ciprofloxacin as the target degradation product, the photocatalytic activity of the composite catalyst was significantly higher than that of the monomer catalyst under visible light irradiation. The characterization results show that the formation of Z-type heterojunction and surface plasmon resonance (SPR) effect enhance the visible light absorption of the catalyst, accelerates the electron transfer, reduces the recombination rate of electron-hole pairs, and thus improves the photocatalytic activity. In addition, Bi0-BOC/WO3 has a larger specific surface area than BiOCl and WO3 and can provide more active sites. Combined with UV–vis diffuse reflection and Mott Schottky curve, a possible electron transfer mechanism of Z-type heterojunction in accordance with Bi0-BOC/WO3 system is proposed. This provides a research idea for antibiotic wastewater treatment.
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