Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151602
Title: Defect-tailoring mediated electron–hole separation in single-unit-cell Bi₃O₄Br nanosheets for boosting photocatalytic hydrogen evolution and nitrogen fixation
Authors: Di, Jun
Xia, Jiexiang
Chisholm, Matthew F.
Zhong, Jun
Chen, Chao
Cao, Xingzhong
Dong, Fan
Chi, Zhen
Chen, Hailong
Weng, Yu-Xiang
Xiong, Jun
Yang, Shi-Ze
Li, Huaming
Liu, Zheng
Dai, Sheng
Keywords: Engineering::Materials
Issue Date: 2019
Source: Di, J., Xia, J., Chisholm, M. F., Zhong, J., Chen, C., Cao, X., Dong, F., Chi, Z., Chen, H., Weng, Y., Xiong, J., Yang, S., Li, H., Liu, Z. & Dai, S. (2019). Defect-tailoring mediated electron–hole separation in single-unit-cell Bi₃O₄Br nanosheets for boosting photocatalytic hydrogen evolution and nitrogen fixation. Advanced Materials, 31(28), e1807576-. https://dx.doi.org/10.1002/adma.201807576
Project: NRF-RF2013-08
MOE2016-T2-1-131
MOE2018-T3-1-002
2017-T1-001-075
Journal: Advanced Materials
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 Bi3 O4 Br nanosheets with surface defects is proposed to boost photocatalytic efficiency by simultaneously promoting bulk- and surface-charge separation. Defect-rich single-unit-cell Bi3 O4 Br displays 4.9 and 30.9 times enhanced photocatalytic hydrogen evolution and nitrogen fixation activity, respectively, than bulk Bi3 O4 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.
URI: https://hdl.handle.net/10356/151602
ISSN: 0935-9648
DOI: 10.1002/adma.201807576
Rights: © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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