Defect engineering in atomically-thin bismuth oxychloride towards photocatalytic oxygen evolution

Di, Jun; Chen, Chao; Yang, Shi -Ze; Ji, Mengxia; Yan, Cheng; Gu, Kaizhi; Xia, Jiexiang; Li, Huaming; Li, Shuzhou; Liu, Zheng

doi:10.1039/c7ta03624h

Title: Defect engineering in atomically-thin bismuth oxychloride towards photocatalytic oxygen evolution

Journal Article · Mon Jun 26 00:00:00 EDT 2017 · Journal of Materials Chemistry. A

DOI:https://doi.org/10.1039/c7ta03624h· OSTI ID:1394603

^[1]; Chen, Chao ^[2];

^[3]; Ji, Mengxia ^[4]; Yan, Cheng ^[2]; Gu, Kaizhi ^[5];

^[4];

^[2];

^[2]

Jiangsu Univ., Zhenjiang (People's Republic of China); Nanyang Technological Univ. (Singapore)
Nanyang Technological Univ. (Singapore)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Jiangsu Univ., Zhenjiang (People's Republic of China)
East China University of Science and Technology, Shanghai (People's Republic of China)

Photocatalytic solar energy conversion is a clean technology for producing renewable energy sources, but its efficiency is greatly hindered by the kinetically sluggish oxygen evolution reaction. Herein, confined defects in atomically-thin BiOCl nanosheets were created to serve as a remarkable platform to explore the relationship between defects and photocatalytic activity. Surface defects can be clearly observed on atomically-thin BiOCl nanosheets from scanning transmission electron microscopy images. Theoretical/experimental results suggest that defect engineering increased states of density and narrowed the band gap. With combined effects from defect induced shortened hole migratory paths and creation of coordination-unsaturated active atoms with dangling bonds, defect-rich BiOCl nanosheets displayed 3 and 8 times higher photocatalytic activity towards oxygen evolution compared with atomically-thin BiOCl nanosheets and bulk BiOCl, respectively. As a result, this successful application of defect engineering will pave a new pathway for improving photocatalytic oxygen evolution activity of other materials.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1394603

Journal Information:: Journal of Materials Chemistry. A, Vol. 5, Issue 27; ISSN 2050-7488

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 87 works

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