Controlled Synthesis and Photocatalytic Antifouling Properties of BiVO₄ with Tunable Morphologies

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• 作者：Zhenbo Xiang ; Yi Wang ; Peng Ju ; Dun Zhang
• 关键词：BiVO4 ; morphology ; photocatalytic ; sterilization ; mechanism
• 刊名：Journal of Electronic Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：46
• 期：2
• 页码：758-765
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Optical and Electronic Materials; Characterization and Evaluation of Materials; Electronics and Microelectronics, Instrumentation; Solid State Physics;
• 出版者：Springer US
• ISSN：1543-186X
• 卷排序：46

文摘

Monoclinic BiVO₄ with different nanostructures were prepared via a facile and rapid route by adding different surfactants. Ethylenediaminetetraacetic acid, polyvinylpyrrolidone, and sodium dodecyl sulfate surfactants were selected as morphology controlling agents. The crystal phase, morphology, and diffuse reflectance spectra of BiVO₄ were characterized by x-ray diffraction, scanning electron microscopy, and UV–visible diffuse reflectance spectra techniques, respectively. The photocatalytic activities of BiVO₄ were investigated by killing the typical marine fouling bacteria Pseudomonas aeruginosa (P. aeruginosa) under visible light irradiation. BiVO₄ with grape-like nanostructure exhibited the best photocatalytic bactericidal activity. The sterilization rate of P. aeruginosa could reach up to 99.9% in 120 min. The photocatalytic mechanism was studied by captive species trapping experiments. The result revealed that photogenerated hole (h+) is the main reactive specie for killing P. aeruginosa under visible light irradiation. In addition, after five recycles, BiVO₄ does not exhibit significant loss of photocatalytic sterilization activity. The results confirm that the synthesized BiVO₄ photocatalyst has long-time reusability and good photocatalytic stability.