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Enhanced Visible-Light Photocatalytic Activity of BiOI/BiOCl Heterojunctions: Key Role of Crystal Facet Combination
Sun, Liming1,2; Xiang, Li1; Zhao, Xian3; Jia, Chun-Jiang1; Yang, Jun4; Jin, Zhao1; Cheng, Xiufeng3; Fan, Weiliu1
2015-06-01
Source PublicationACS CATALYSIS
ISSN2155-5435
Volume5Issue:6Pages:3540-3551
Abstract

Two comparable models of BiOI/BiOCl heterojuctions with different interface structures (crystal surface orientation and crystal surface combination), denoted as BiOI(001)/BiOCl(001) and BiOI(001)/BiOCl(010), have been prepared via integrating heterojuncton nanostructure construction with crystal facet engineering. BiOI(001)/BiOCl(010) had a greater degree of lattice mismatch and displayed higher visible-light photocatalytic activity than BiOI(001)/BiOCl(001). In general, the activity of a photocatalyst (eta(PC)) has a positive correlation with light harvesting (eta(LH)) charge separation (eta(CS)), and charge injection (eta(CI)) On the basis of the experimental results, we considered that the higher (eta(CI)) value of BiOI(001)/BiOCl(010) was the main reason for its better visible-light photocatalytic performance. In combination with theoretical calculations, we found that the higher eta(CI) value of BiOI(001)/BiOCl(010) was the result of a shorter photogenerated electron diffusion distance, assisted by the self-induced internal electric fields of the BiOCl slabs. This indicated that the crystal facet combination is the key to enhancing the photocatalytic activity of BiOI/BiOCl. Our work offers an archetype for the further design of heterojunction photocatalysts with a fine tuning of the interface structures in order to reach optimized charge injection and enhanced photocatalytic activity.

KeywordHeterojunction Photocatalysts Crystal Facet Engineering Internal Electric Fields Directional Transfer Of Carriers First-principles Study
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1021/cs501631n
Indexed BySCI
Language英语
WOS KeywordPHOTOELECTROCHEMICAL WATER OXIDATION ; BIOX X ; NANOPLATE MICROSPHERES ; CATALYTIC PERFORMANCE ; HYDROGEN-PRODUCTION ; SEMICONDUCTOR ; TIO2 ; BR ; IRRADIATION ; COMPOSITE
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000355964300041
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19286
Collection多相复杂系统国家重点实验室
Affiliation1.Shandong Univ, Key Lab Colloid & Interface Chem, State Educ Minist, Sch Chem & Chem Engn, Jinan 250100, Peoples R China
2.Jiangsu Normal Univ, Dept Chem, Sch Chem & Chem Engn, Xuzhou 221116, Peoples R China
3.Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
4.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Sun, Liming,Xiang, Li,Zhao, Xian,et al. Enhanced Visible-Light Photocatalytic Activity of BiOI/BiOCl Heterojunctions: Key Role of Crystal Facet Combination[J]. ACS CATALYSIS,2015,5(6):3540-3551.
APA Sun, Liming.,Xiang, Li.,Zhao, Xian.,Jia, Chun-Jiang.,Yang, Jun.,...&Fan, Weiliu.(2015).Enhanced Visible-Light Photocatalytic Activity of BiOI/BiOCl Heterojunctions: Key Role of Crystal Facet Combination.ACS CATALYSIS,5(6),3540-3551.
MLA Sun, Liming,et al."Enhanced Visible-Light Photocatalytic Activity of BiOI/BiOCl Heterojunctions: Key Role of Crystal Facet Combination".ACS CATALYSIS 5.6(2015):3540-3551.
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