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Fabrication of Bi-Bi3O4Cl plasmon photocatalysts for removal of aqueous emerging contaminants under visible light

Journal of Environmental Sciences 2022年第8期34卷 87-100页

作者： Zeqing Long Hui Song Guangming Zhang Jingsi Gao Jia Zhu School of Energy&Environmental Engineering Hebei University of TechnologyXiping roadBeichen districtTianjin 300130China School of Environment&Natural Resources Renmin University of ChinaBeijing 100872China School of Construction and Environment Engineering Shenzhen PolytechnicShenzhen 518055China Shanxi Aerospace Qinghua Equipment Co. Ltd.Changzhi 046012China

Photocatalytic oxidation of emerging contaminants(ECs) in water has recently gained extensive attentions. In this study, bismuth oxychloride-based plasmon photocatalysts(BiBiOCl) exhibiting high performance were successfully developed by reducing Bion the surface of BiOCl. Consequently, the photocatalysts were used to remove ECs from *** effects of developmental process and Bi metal plasmon resonance on the photoelectric performances of Bi-BiOCl were investigated through a series of characterizations. The UV-vis diffuse reflection and photoluminescence spectra revealed that the light absorption range of the photocatalyst gradually increased and the electron recombination rate gradually decreased with the introduction of Bi metals. The optimal removal rates of ciprofloxacin and tetrabromobisphenol A by Bi-BiOCl were 93.8% and 96.4%;the respective reaction rate constants were 5.48 and 4.93 times higher than that of BiOCl. The mechanism study indicated that main reactants in the photocatalytic system were ·O-2radicals and photogenerated holes, and the existence of oxygen vacancies and Bi metals promoted electron transfer in photocatalyst. In conclusion, this research produces a novel, green, highly efficient, and stable visible light photocatalyst for the removal of ECs from water.

关键词： plasmon photocatalysts Environmental purification Bi3O4Cl Emerging contaminants Hazardous substance

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