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Chemical etching preparation of the Bi2WO6/BiOI p-n heterojunction with enhanced photocatalytic antifouling activity under visible light irradiation
Xiang, Yuhui1,2; Ju, Peng2,3; Wang, Yi2; Sun, Yan2; Zhang, Dun2; Yu, Jianqiang1
2016-03-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
Volume288Issue:2016Pages:264-275
SubtypeArticle
AbstractIn this paper, a novel Bi2WO6/BiOI heterojunction photocatalyst was prepared based on a chemical etching method and used in photocatalytic antifouling. The as-prepared Bi2WO6/BiOI photocatalyst was composed of Bi2WO6 and BiOI, exhibiting a three-dimensional hierarchical microsphere structure. Experimental results indicated that the molar percentage of Bi2WO6 to BiOI leaded to different morphologies and photocatalytic activities of Bi2WO6/BiOI composites. 30%Bi2WO6/BiOI exhibited an improved photocatalytic performance under visible light irradiation compared to pure Bi2WO6, pure BiOI, and other Bi2WO6/BiOI composites. Almost all (99.99%) of Pseudomonas Aeruginosa (P. aeruginosa), Escherichia Coli (E. coli) and Staphylococcus Aureus (S. aureus) could be killed and the degradation efficiency of methyl blue (MB) could achieve 100% within 60 min in the presence of 30%Bi2WO6/BiOI. In addition, after six circulating photocatalytic antifouling experiments, 30%Bi2WO6/BiOI exhibited no significant loss of photocatalytic performance, verifying its stability and reusability, which was especially important for its application. Moreover, a possible photocatalytic mechanism was proposed based on active species trapping experiments, demonstrating that the superoxide radicals (O-center dot(2)-) and the holes (h(+)) were the main reactive species in this system. The obviously enhanced photocatalytic activity of the 30%Bi2WO6/BiOI heterojunction photocatalyst could be mainly attributed to the formation of the p-n heterojunction, accelerating the separation of photogenerated charge carriers. This work provides a valuable information on the design of novel heterojunction photocatalysts with excellent photocatalytic properties used in marine antifouling. (C) 2015 Elsevier B.V. All rights reserved.
KeywordBioi Bi2wo6 Photocatalysis Antifouling Visible Light
DOI10.1016/j.cej.2015.11.103
Indexed BySCI
Language英语
WOS IDWOS:000370085900028
Citation statistics
Cited Times:71[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/112464
Collection海洋环境腐蚀与与生物污损重点实验室
Affiliation1.Qingdao Univ, Key Lab New Fiber Mat & Modern Text, Collaborat Innovat Ctr Marine Biomass Fibers Mat, 308 Ningxia Rd, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Key Lab Marine Environm Corros & Biofouling, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, 19 Jia Yuquan Rd, Beijing 100039, Peoples R China
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Xiang, Yuhui,Ju, Peng,Wang, Yi,et al. Chemical etching preparation of the Bi2WO6/BiOI p-n heterojunction with enhanced photocatalytic antifouling activity under visible light irradiation[J]. CHEMICAL ENGINEERING JOURNAL,2016,288(2016):264-275.
APA Xiang, Yuhui,Ju, Peng,Wang, Yi,Sun, Yan,Zhang, Dun,&Yu, Jianqiang.(2016).Chemical etching preparation of the Bi2WO6/BiOI p-n heterojunction with enhanced photocatalytic antifouling activity under visible light irradiation.CHEMICAL ENGINEERING JOURNAL,288(2016),264-275.
MLA Xiang, Yuhui,et al."Chemical etching preparation of the Bi2WO6/BiOI p-n heterojunction with enhanced photocatalytic antifouling activity under visible light irradiation".CHEMICAL ENGINEERING JOURNAL 288.2016(2016):264-275.
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