Defect‐Tailoring Mediated Electron–Hole Separation in Single‐Unit‐Cell Bi 3 O 4 Br Nanosheets for Boosting Photocatalytic Hydrogen Evolution and Nitrogen Fixation
[5];
- School of Chemistry and Chemical Engineering Institute for Energy Research Jiangsu University 301 Xuefu Road Zhenjiang 212013 P. R. China, Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
- School of Chemistry and Chemical Engineering Institute for Energy Research Jiangsu University 301 Xuefu Road Zhenjiang 212013 P. R. China, Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge 37830 TN USA
- Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge 37830 TN USA
- Institute of Functional Nano and Soft Materials Soochow University Suzhou 215123 P. R. China
- Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore
- Multi‐Discipline Research Division Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China
- College of Environment and Resources Chongqing Technology and Business University Chongqing 400067 P. R. China
- Laboratory of Soft Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
- School of Chemistry and Chemical Engineering Institute for Energy Research Jiangsu University 301 Xuefu Road Zhenjiang 212013 P. R. China
- Chemical Sciences Division Oak Ridge National Laboratory Oak Ridge 37830 TN USA
Abstract Solar photocatalysis is a potential solution to satisfying energy demand and its resulting environmental impact. However, the low electron–hole separation efficiency in semiconductors has slowed the development of this technology. The effect of defects on electron–hole separation is not always clear. A model atomically thin structure of single‐unit‐cell Bi 3 O 4 Br nanosheets with surface defects is proposed to boost photocatalytic efficiency by simultaneously promoting bulk‐ and surface‐charge separation. Defect‐rich single‐unit‐cell Bi 3 O 4 Br displays 4.9 and 30.9 times enhanced photocatalytic hydrogen evolution and nitrogen fixation activity, respectively, than bulk Bi 3 O 4 Br. After the preparation of single‐unit‐cell structure, the bismuth defects are controlled to tune the oxygen defects. Benefiting from the unique single‐unit‐cell architecture and defects, the local atomic arrangement and electronic structure are tuned so as to greatly increase the charge separation efficiency and subsequently boost photocatalytic activity. This strategy provides an accessible pathway for next‐generation photocatalysts.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1512325
- Journal Information:
- Advanced Materials, Journal Name: Advanced Materials Journal Issue: 28 Vol. 31; ISSN 0935-9648
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
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