A novel calcined Bi2WO6/BiVO4 heterojunction photocatalyst with highly enhanced photocatalytic activity

doi:10.1016/j.cej.2013.10.001

	A novel calcined Bi2WO6/BiVO4 heterojunction photocatalyst with highly enhanced photocatalytic activity
	Ju, Peng1,2 ; Wang, Ping 3; Li, Bin 3; Fan, Hai 3; Ai, Shiyun 3; Zhang, Dun 1; Wang, Yi1 ; Ai, SY (reprint author), Shandong Agr Univ, Coll Chem & Mat Sci, 61 Daizong St, Tai An 271018, Shandong, Peoples R China.
	2014-01-15
发表期刊	CHEMICAL ENGINEERING JOURNAL
卷号	236 页码:430-437
文章类型	Article
摘要	In this study, a novel visible-light-sensitive calcined Bi2WO6/BiVO4 (C-Bi2WO6/BiVO4) heterojunction photocatalyst was synthesized via a hydrothermal process followed by the calcination at 600 degrees C. The as-prepared multilayer C-Bi2WO6/BiVO4 photocatalyst was composed of Bi2WO6 and BiVO4 with a good visible-light absorption performance. Experimental results showed that C-Bi2WO6/BiVO4 exhibited higher photocatalytic activity than C-Bi2WO6, C-BiVO4, and uncalcined Bi2WO6/BiVO4, and the degradation efficiency of Rhodamine B (RhB) could achieve 100% within 30 min. In addition, after six recycles for the photodegradation of RhB, C-Bi2WO6/BiVO4 did not exhibit significant loss of photocatalytic activity, confirming its stability and long-time reusability. The photocatalytic mechanism was studied by active species trapping experiments, revealing that the holes (h(+)) and hydroxyl radicals ((OH)-O-center dot) played key roles in RhB degradation. Moreover, on the basis of the calculated energy bands, the obviously enhanced photocatalytic performance can be attributed to the efficient separation of photoinduced electron hole pairs. In addition, the calcination improved the crystallinity of C-Bi2WO6/BiVO4, combined with the excellent photoabsorption ability further improved its photocatalytic activity. The present study provides a new strategy to design composite photocatalysts with enhanced photocatalytic performance for water purification and other applications. (C) 2013 Elsevier B.V. All rights reserved.
关键词	Bi2wo6 Bivo4 Heterojunction Photocatalysis Visible Light
学科领域	Engineering
DOI	10.1016/j.cej.2013.10.001
收录类别	SCI
语种	英语
WOS记录号	WOS:000328801100046
引用统计	被引频次：265[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/23876
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Ai, SY (reprint author), Shandong Agr Univ, Coll Chem & Mat Sci, 61 Daizong St, Tai An 271018, Shandong, Peoples R China.
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China 3.Shandong Agr Univ, Coll Chem & Mat Sci, Tai An 271018, Shandong, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Ju, Peng,Wang, Ping,Li, Bin,et al. A novel calcined Bi2WO6/BiVO4 heterojunction photocatalyst with highly enhanced photocatalytic activity[J]. CHEMICAL ENGINEERING JOURNAL,2014,236:430-437.
APA	Ju, Peng.,Wang, Ping.,Li, Bin.,Fan, Hai.,Ai, Shiyun.,...&Ai, SY .(2014).A novel calcined Bi2WO6/BiVO4 heterojunction photocatalyst with highly enhanced photocatalytic activity.CHEMICAL ENGINEERING JOURNAL,236,430-437.
MLA	Ju, Peng,et al."A novel calcined Bi2WO6/BiVO4 heterojunction photocatalyst with highly enhanced photocatalytic activity".CHEMICAL ENGINEERING JOURNAL 236(2014):430-437.

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