Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity

doi:10.1021/acssuschemeng.9b00548

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	Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity
	Wang, Xuewen 1; Zhou, Chengxi 1; Yin, Lichang 3; Zhang, Rongbin 1; Liu, Gang 2,3
刊名	ACS SUSTAINABLE CHEMISTRY & ENGINEERING
	2019-04-15
卷号	7 期号:8 页码:7900-7907
关键词	Iodine vacancy BiOI Photocatalyst Visible light
ISSN号	2168-0485
DOI	10.1021/acssuschemeng.9b00548
通讯作者	Zhang, Rongbin(rbzhang@ncu.edu.cn) ; Liu, Gang(gangliu@imr.ac.cn)
英文摘要	Bismuth oxyhalides with layered structures have emerged as an important class of photocatalysts but usually suffer from low activity largely due to their unfavorable band structures. Although point defects as typical electronic structure modifiers have been actively used to modify electronic structures of photocatalysts for high photocatalytic activity, the underlying role of halogen vacancies in improving activity of bismuth oxyhalides has been overlooked. In this study, we demonstrate the substantial role of iodine vacancies in enabling photocatalytic activity of BiOI as a model oxyhalide photocatalyst. It is found that iodine vacancies cause a 0.23 eV downward shift of the valence band maximum of BiOI but not much change in the bandgap. Such band structure modification leads to the formation of photogenerated holes with a stronger oxidative ability, which is favorable for photocatalysis with the holes induced half reaction as a rate-determining step. The results obtained might provide an important implication in designing highly efficient oxyhalide-based photocatalysts by controlling halogen vacancies.
资助项目	National Science Fund of China (NSFC)[51662030] ; National Science Fund of China (NSFC)[51862023] ; National Science Fund of China (NSFC)[51472249] ; National Science Fund of China (NSFC)[51825204] ; Natural Science Foundation of Jiangxi Province[20171BAB206014] ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)[U1501501]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Engineering
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000465188600050
资助机构	National Science Fund of China (NSFC) ; Natural Science Foundation of Jiangxi Province ; Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase)
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133048]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Rongbin; Liu, Gang
作者单位	1.Nanchang Univ, Coll Chem, Key Lab Jiangxi Prov Environm & Energy Catalysis, 999 Xuefu Rd, Nanchang 330031, Jiangxi, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xuewen,Zhou, Chengxi,Yin, Lichang,et al. Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity[J]. ACS SUSTAINABLE CHEMISTRY & ENGINEERING,2019,7(8):7900-7907.
APA	Wang, Xuewen,Zhou, Chengxi,Yin, Lichang,Zhang, Rongbin,&Liu, Gang.(2019).Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity.ACS SUSTAINABLE CHEMISTRY & ENGINEERING,7(8),7900-7907.
MLA	Wang, Xuewen,et al."Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity".ACS SUSTAINABLE CHEMISTRY & ENGINEERING 7.8(2019):7900-7907.