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Iodine-Deficient BiOI Nanosheets with Lowered Valence Band Maximum To Enable Visible Light Photocatalytic Activity
Wang, Xuewen1; Zhou, Chengxi1; Yin, Lichang2; Zhang, Rongbin1; Liu, Gang2,3
Corresponding AuthorZhang, Rongbin(rbzhang@ncu.edu.cn) ; Liu, Gang(gangliu@imr.ac.cn)
2019-04-15
Source PublicationACS SUSTAINABLE CHEMISTRY & ENGINEERING
ISSN2168-0485
Volume7Issue:8Pages:7900-7907
AbstractBismuth 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.
KeywordIodine vacancy BiOI Photocatalyst Visible light
Funding OrganizationNational 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)
DOI10.1021/acssuschemeng.9b00548
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaChemistry ; Science & Technology - Other Topics ; Engineering
WOS SubjectChemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
WOS IDWOS:000465188600050
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:20[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/133050
Collection中国科学院金属研究所
Corresponding AuthorZhang, Rongbin; Liu, Gang
Affiliation1.Nanchang Univ, Coll Chem, Key Lab Jiangxi Prov Environm & Energy Catalysis, 999 Xuefu Rd, Nanchang 330031, Jiangxi, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
Recommended Citation
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.
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