Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol
Although the internal electric field (IEF) of bismuth oxyiodide (BiOI) is acknowledged as a potent driving force for efficient charge separation, enhancing the intensity of IEF remains a challenge. Herein, highly crystalline BiOI nanosheets with I‐rich surface are employed to intensify IEF and direc...
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-09-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202200380 |
| _version_ | 1797685034970251264 |
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| author | Zhaohui Wu Wenlu Li Jingyi Xu Jianfang Jing Junshan Li Jie Shen Lu Yang Wenhui Feng Shiying Zhang Yongfa Zhu |
| author_facet | Zhaohui Wu Wenlu Li Jingyi Xu Jianfang Jing Junshan Li Jie Shen Lu Yang Wenhui Feng Shiying Zhang Yongfa Zhu |
| author_sort | Zhaohui Wu |
| collection | DOAJ |
| description | Although the internal electric field (IEF) of bismuth oxyiodide (BiOI) is acknowledged as a potent driving force for efficient charge separation, enhancing the intensity of IEF remains a challenge. Herein, highly crystalline BiOI nanosheets with I‐rich surface are employed to intensify IEF and direct the charge migration. In comparison to I‐poor BiOI nanosheets, which possess Bi−O layer termination and I‐defects, the I‐rich BiOI demonstrates 62.5‐fold improvement in IEF intensity to its well‐developed high crystalline structure, and its IEF direction is reversed by the surface I‐rich layers. This intensified IEF of I‐rich BiOI induces numerous holes (h+) to migrate to the surface of primary exposed (001) facets and electrons (e−) to the lateral facets efficiently, resulting in efficient charge separation spatially. Additionally, the surface accumulates h+ and superoxide radicals and acts in synergy to enhance the photodegradation of phenol. The photocatalytic activity of the I‐rich BiOI is found to be approximately fivefold and threefold higher than that of I‐poor BiOI under full spectra and visible light, respectively. Herein, the manipulation of IEF through surface and bulk structure regulation of BiOI for efficient charge separation is discussed, expecting to rationally improve photocatalytic performances. |
| first_indexed | 2024-03-12T00:39:26Z |
| format | Article |
| id | doaj.art-b24b5d4599084ef5876e7c95b09b1699 |
| institution | Directory Open Access Journal |
| issn | 2688-4062 |
| language | English |
| last_indexed | 2024-03-12T00:39:26Z |
| publishDate | 2023-09-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj.art-b24b5d4599084ef5876e7c95b09b16992023-09-15T09:17:18ZengWiley-VCHSmall Structures2688-40622023-09-0149n/an/a10.1002/sstr.202200380Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of PhenolZhaohui Wu0Wenlu Li1Jingyi Xu2Jianfang Jing3Junshan Li4Jie Shen5Lu Yang6Wenhui Feng7Shiying Zhang8Yongfa Zhu9Hunan Key Laboratory of Applied Environmental Photocatalysis Changsha University Changsha Hunan Province 410022 ChinaDepartment of Chemistry Tsinghua University Beijing 100084 ChinaDepartment of Chemistry Tsinghua University Beijing 100084 ChinaCollege of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 ChinaInstitute for Advanced Study Chengdu University Chengdu 610106 P. R. ChinaHunan Key Laboratory of Applied Environmental Photocatalysis Changsha University Changsha Hunan Province 410022 ChinaHunan Key Laboratory of Applied Environmental Photocatalysis Changsha University Changsha Hunan Province 410022 ChinaHunan Key Laboratory of Applied Environmental Photocatalysis Changsha University Changsha Hunan Province 410022 ChinaHunan Key Laboratory of Applied Environmental Photocatalysis Changsha University Changsha Hunan Province 410022 ChinaDepartment of Chemistry Tsinghua University Beijing 100084 ChinaAlthough the internal electric field (IEF) of bismuth oxyiodide (BiOI) is acknowledged as a potent driving force for efficient charge separation, enhancing the intensity of IEF remains a challenge. Herein, highly crystalline BiOI nanosheets with I‐rich surface are employed to intensify IEF and direct the charge migration. In comparison to I‐poor BiOI nanosheets, which possess Bi−O layer termination and I‐defects, the I‐rich BiOI demonstrates 62.5‐fold improvement in IEF intensity to its well‐developed high crystalline structure, and its IEF direction is reversed by the surface I‐rich layers. This intensified IEF of I‐rich BiOI induces numerous holes (h+) to migrate to the surface of primary exposed (001) facets and electrons (e−) to the lateral facets efficiently, resulting in efficient charge separation spatially. Additionally, the surface accumulates h+ and superoxide radicals and acts in synergy to enhance the photodegradation of phenol. The photocatalytic activity of the I‐rich BiOI is found to be approximately fivefold and threefold higher than that of I‐poor BiOI under full spectra and visible light, respectively. Herein, the manipulation of IEF through surface and bulk structure regulation of BiOI for efficient charge separation is discussed, expecting to rationally improve photocatalytic performances.https://doi.org/10.1002/sstr.202200380BiOI nanosheetshigh crystallinityintrinsic internal electric fieldI-rich terminationphotocatalytic performance |
| spellingShingle | Zhaohui Wu Wenlu Li Jingyi Xu Jianfang Jing Junshan Li Jie Shen Lu Yang Wenhui Feng Shiying Zhang Yongfa Zhu Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol Small Structures BiOI nanosheets high crystallinity intrinsic internal electric field I-rich termination photocatalytic performance |
| title | Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol |
| title_full | Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol |
| title_fullStr | Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol |
| title_full_unstemmed | Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol |
| title_short | Internal Electric Field Enhancement by the I‐Rich Surface of Highly Crystallized BiOI Nanosheets for Boosted Photocatalytic Degradation of Phenol |
| title_sort | internal electric field enhancement by the i rich surface of highly crystallized bioi nanosheets for boosted photocatalytic degradation of phenol |
| topic | BiOI nanosheets high crystallinity intrinsic internal electric field I-rich termination photocatalytic performance |
| url | https://doi.org/10.1002/sstr.202200380 |
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