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题名: Controllable one-pot synthesis of a nest-like Bi2WO6/BiVO4 composite with enhanced photocatalytic antifouling performance under visible light irradiation
作者: Ju Peng(鞠鹏)1,2; Wang Yi(王毅)1; Sun, Yan1; Zhang, Dun1
刊名: DALTON TRANSACTIONS
出版日期: 2016
卷号: 45, 期号:11, 页码:4588-4602
DOI: 10.1039/c6dt00118a
文章类型: Article
英文摘要: In this study, a novel visible-light-sensitive Bi2WO6/BiVO4 composite photocatalyst was controllably synthesized through a facile one-pot hydrothermal method. The Bi2WO6/BiVO4 composite exhibited a perfect nest-like hierarchical microsphere structure, which was constructed by the self-assembly of nanoplates with the assistance of polyvinylpyrrolidone (PVP). The growth mechanism of the Bi2WO6/BiVO4 composite and the effect of its structure on its photocatalytic performance was investigated and proposed. Experimental results showed that the Bi2WO6/BiVO4 composites displayed enhanced photocatalytic antifouling activities under visible light irradiation compared to pure Bi2WO6 and BiVO4 center dot Bi2WO6/BiVO4-1 exhibited the best photocatalytic antifouling performance, and almost all (99.99%) Pseudomonas aeruginosa (P. aeruginosa), Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria were killed within 30 min. Moreover, the Bi2WO6/BiVO4-1 composite exhibited excellent stability and reusability in the cycled experiments. The photocatalytic antifouling mechanism was proposed based on the active species trapping experiments, revealing that the photo-induced holes (h(+)) and hydroxyl radicals ((OH)-O-center dot) could attack the cell wall and cytoplasmic membrane directly and lead to the death of bacteria. The obviously enhanced photocatalytic activity of the Bi2WO6/BiVO4-1 composite could be mainly attributed to the formation of heterojunctions, accelerating the separation of photo-induced electrons and holes. Furthermore, the large BET surface area combined with the wide photoabsorption region further improved the photocatalytic performance of the Bi2WO6/BiVO4-1 composite. This study provides a new strategy to develop novel composite photocatalysts with enhanced photocatalytic performance for marine antifouling and water purification.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000372191500020
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.qdio.ac.cn/handle/337002/126194
Appears in Collections:海洋腐蚀与防护研究发展中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, 19 Jia Yuquan Rd, Beijing 100039, Peoples R China

Recommended Citation:
Ju, Peng,Wang, Yi,Sun, Yan,et al. Controllable one-pot synthesis of a nest-like Bi2WO6/BiVO4 composite with enhanced photocatalytic antifouling performance under visible light irradiation[J]. DALTON TRANSACTIONS,2016,45(11):4588-4602.
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文件名: Controllable one-pot synthesis of a nest-like Bi2WO6_BiVO4 composite with enhanced photocatalytic antifouling performance under visible light irradiation.pdf
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