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Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts
Construction of internal electric fields (IEFs) is crucial to realize efficient charge separation for charge-induced redox reactions, such as water splitting and CO(2) reduction. However, a quantitative understanding of the charge transfer dynamics modulated by IEFs remains elusive. Here, electron m...
Autores principales: | , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9038904/ https://www.ncbi.nlm.nih.gov/pubmed/35468890 http://dx.doi.org/10.1038/s41467-022-29825-0 |
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author | Luo, Zhishan Ye, Xiaoyuan Zhang, Shijia Xue, Sikang Yang, Can Hou, Yidong Xing, Wandong Yu, Rong Sun, Jie Yu, Zhiyang Wang, Xinchen |
author_facet | Luo, Zhishan Ye, Xiaoyuan Zhang, Shijia Xue, Sikang Yang, Can Hou, Yidong Xing, Wandong Yu, Rong Sun, Jie Yu, Zhiyang Wang, Xinchen |
author_sort | Luo, Zhishan |
collection | PubMed |
description | Construction of internal electric fields (IEFs) is crucial to realize efficient charge separation for charge-induced redox reactions, such as water splitting and CO(2) reduction. However, a quantitative understanding of the charge transfer dynamics modulated by IEFs remains elusive. Here, electron microscopy study unveils that the non-equilibrium photo-excited electrons are collectively steered by two contiguous IEFs within binary (001)/(200) facet junctions of BiOBr platelets, and they exhibit characteristic Gaussian distribution profiles on reduction facets by using metal co-catalysts as probes. An analytical model justifies the Gaussian curve and allows us to measure the diffusion length and drift distance of electrons. The charge separation efficiency, as well as photocatalytic performances, are maximized when the platelet size is about twice the drift distance, either by tailoring particle dimensions or tuning IEF-dependent drift distances. The work offers great flexibility for precisely constructing high-performance particulate photocatalysts by understanding charge transfer dynamics. |
format | Online Article Text |
id | pubmed-9038904 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-90389042022-04-28 Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts Luo, Zhishan Ye, Xiaoyuan Zhang, Shijia Xue, Sikang Yang, Can Hou, Yidong Xing, Wandong Yu, Rong Sun, Jie Yu, Zhiyang Wang, Xinchen Nat Commun Article Construction of internal electric fields (IEFs) is crucial to realize efficient charge separation for charge-induced redox reactions, such as water splitting and CO(2) reduction. However, a quantitative understanding of the charge transfer dynamics modulated by IEFs remains elusive. Here, electron microscopy study unveils that the non-equilibrium photo-excited electrons are collectively steered by two contiguous IEFs within binary (001)/(200) facet junctions of BiOBr platelets, and they exhibit characteristic Gaussian distribution profiles on reduction facets by using metal co-catalysts as probes. An analytical model justifies the Gaussian curve and allows us to measure the diffusion length and drift distance of electrons. The charge separation efficiency, as well as photocatalytic performances, are maximized when the platelet size is about twice the drift distance, either by tailoring particle dimensions or tuning IEF-dependent drift distances. The work offers great flexibility for precisely constructing high-performance particulate photocatalysts by understanding charge transfer dynamics. Nature Publishing Group UK 2022-04-25 /pmc/articles/PMC9038904/ /pubmed/35468890 http://dx.doi.org/10.1038/s41467-022-29825-0 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Luo, Zhishan Ye, Xiaoyuan Zhang, Shijia Xue, Sikang Yang, Can Hou, Yidong Xing, Wandong Yu, Rong Sun, Jie Yu, Zhiyang Wang, Xinchen Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title | Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title_full | Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title_fullStr | Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title_full_unstemmed | Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title_short | Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts |
title_sort | unveiling the charge transfer dynamics steered by built-in electric fields in biobr photocatalysts |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9038904/ https://www.ncbi.nlm.nih.gov/pubmed/35468890 http://dx.doi.org/10.1038/s41467-022-29825-0 |
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