Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification
Devising a desirable nano-heterostructured photoelectrode based on the charge transfer kinetics mechanism is a pivotal strategy for implementing efficient photoelectrocatalytic (PEC) technology, since the charge separation and utilization efficiency of a photoelectrode is critical to its PEC perform...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2024-02-01
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| Series: | eScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667141723001520 |
| _version_ | 1797336847426256896 |
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| author | Linhan Jian Guowen Wang Xinghui Liu Hongchao Ma |
| author_facet | Linhan Jian Guowen Wang Xinghui Liu Hongchao Ma |
| author_sort | Linhan Jian |
| collection | DOAJ |
| description | Devising a desirable nano-heterostructured photoelectrode based on the charge transfer kinetics mechanism is a pivotal strategy for implementing efficient photoelectrocatalytic (PEC) technology, since the charge separation and utilization efficiency of a photoelectrode is critical to its PEC performance. Herein, we fabricate a F–Co3O4@Bi2WO6 core–shell hetero-array photoanode by coupling Bi2WO6 nanosheets with F–Co3O4 nanowires using a simple solvothermal solution method. The three-dimensional hierarchical heterostructure has a homogeneous chemical interface, helping it to promote an S-scheme-based carrier transport kinetics and maintain excellent cycling stability. Charge density difference calculations verify the electron migration trend from F–Co3O4 to Bi2WO6 upon hybridization and the formation of an internal electric field in the heterojunction, consistent with the S-scheme mechanism, which is identified by in situ irradiation X-ray photoelectron spectroscopy and by ultraviolet photoelectron spectroscopy. The optimized F–Co3O4@Bi2WO6-2 photoelectrode achieves high carrier utilization efficiency and exhibits superior PEC degradation performance for various organic pollutants, including reactive brilliant blue KN-R, rhodamine B, sulfamethoxazole, and bisphenol A. This work not only reveals that F–Co3O4@Bi2WO6-2 is effective for PEC water remediation but also provides a strategy to enhance carrier transport kinetics by designing binary oxides. |
| first_indexed | 2024-03-08T09:00:47Z |
| format | Article |
| id | doaj.art-b89d22bb91c147cea3c1252771315a73 |
| institution | Directory Open Access Journal |
| issn | 2667-1417 |
| language | English |
| last_indexed | 2024-03-08T09:00:47Z |
| publishDate | 2024-02-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | eScience |
| spelling | doaj.art-b89d22bb91c147cea3c1252771315a732024-02-01T06:35:40ZengKeAi Communications Co. Ltd.eScience2667-14172024-02-0141100206Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purificationLinhan Jian0Guowen Wang1Xinghui Liu2Hongchao Ma3School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No.1 Qinggongyuan, Ganjingzi District, Dalian 116034, People's Republic of ChinaSchool of Light Industry & Chemical Engineering, Dalian Polytechnic University, No.1 Qinggongyuan, Ganjingzi District, Dalian 116034, People's Republic of ChinaDepartment of Chemistry, Sungkyunkwan University (SKKU), Jangan-Gu, Suwon 16419, Republic of Korea; Division of Research and Development, Lovely Professional University, Phagwara, India; Science and Technology on Aerospace Chemical Power Laboratory, Xiangyang 441003, People's Republic of China; Hubei Institute of Aerospace Chemotechnology, Xiangyang 441003, People's Republic of China; Corresponding author.School of Light Industry & Chemical Engineering, Dalian Polytechnic University, No.1 Qinggongyuan, Ganjingzi District, Dalian 116034, People's Republic of China; Corresponding author.Devising a desirable nano-heterostructured photoelectrode based on the charge transfer kinetics mechanism is a pivotal strategy for implementing efficient photoelectrocatalytic (PEC) technology, since the charge separation and utilization efficiency of a photoelectrode is critical to its PEC performance. Herein, we fabricate a F–Co3O4@Bi2WO6 core–shell hetero-array photoanode by coupling Bi2WO6 nanosheets with F–Co3O4 nanowires using a simple solvothermal solution method. The three-dimensional hierarchical heterostructure has a homogeneous chemical interface, helping it to promote an S-scheme-based carrier transport kinetics and maintain excellent cycling stability. Charge density difference calculations verify the electron migration trend from F–Co3O4 to Bi2WO6 upon hybridization and the formation of an internal electric field in the heterojunction, consistent with the S-scheme mechanism, which is identified by in situ irradiation X-ray photoelectron spectroscopy and by ultraviolet photoelectron spectroscopy. The optimized F–Co3O4@Bi2WO6-2 photoelectrode achieves high carrier utilization efficiency and exhibits superior PEC degradation performance for various organic pollutants, including reactive brilliant blue KN-R, rhodamine B, sulfamethoxazole, and bisphenol A. This work not only reveals that F–Co3O4@Bi2WO6-2 is effective for PEC water remediation but also provides a strategy to enhance carrier transport kinetics by designing binary oxides.http://www.sciencedirect.com/science/article/pii/S2667141723001520S-schemeInternal electric fieldBi2WO6Water purificationPhotoelectrocatalysis |
| spellingShingle | Linhan Jian Guowen Wang Xinghui Liu Hongchao Ma Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification eScience S-scheme Internal electric field Bi2WO6 Water purification Photoelectrocatalysis |
| title | Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification |
| title_full | Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification |
| title_fullStr | Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification |
| title_full_unstemmed | Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification |
| title_short | Unveiling an S-scheme F–Co3O4@Bi2WO6 heterojunction for robust water purification |
| title_sort | unveiling an s scheme f co3o4 bi2wo6 heterojunction for robust water purification |
| topic | S-scheme Internal electric field Bi2WO6 Water purification Photoelectrocatalysis |
| url | http://www.sciencedirect.com/science/article/pii/S2667141723001520 |
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