Synergistic defect and doping engineering building strong bonded S-scheme heterojunction for photocatalysis

Photocatalytic degradation of pollutants is considered a promising approach for wastewater treatment, but is hampered by low efficiency and limited understanding of degradation pathways. A novel oxygen-doped porous g-C3N4/oxygen vacancies-rich BiOCl (OCN/OVBOC) heterostructure was prepared for photo...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2023-12, Vol.344, p.140347-140347, Article 140347
Main Authors: Zhang, Jia-Jing, Di, Jun, Zhao, Yun-Peng, Zheng, He-Shan, Song, Pin, Tian, Jing-Zhi, Jiang, Wei, Zheng, Yong-Jie
Format: Article
Language:English
Subjects:
Oxygen doping
Oxygen vacancy
Photocatalytic
S-scheme heterojunction
Strong bonded interface
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Summary:Photocatalytic degradation of pollutants is considered a promising approach for wastewater treatment, but is hampered by low efficiency and limited understanding of degradation pathways. A novel oxygen-doped porous g-C3N4/oxygen vacancies-rich BiOCl (OCN/OVBOC) heterostructure was prepared for photocatalytic degradation of bisphenol A (BPA). The synergistic defect and doping engineering favor the formation of strong bonded interface for S-scheme mechanism. Among them, 0.3 OCN/OVBOC showed the most excellent degradation rate, which was 8 times and 4 times higher than that of pure g-C3N4 and BiOCl, respectively. This excellent performance is mainly attributed to the significantly enhanced charge separation via strong bonded interface and redox capability of the S-scheme heterojunction structure, by tuning the coordination excitation and electron localization of the catalyst via O doping and vacancies. This work provides important insights into the role of synergistic defect and doping engineering in facilitating the formation of strong bonded S-scheme heterojunction and ultimately sheds new light on the design of efficient photocatalysts. [Display omitted] •A novel synergistic defect and doping engineering is proposed to build strong bonded interface for S-scheme heterojunction.•The excellent performance is derived by tuning the coordination excitation of the catalyst via O doping and vacancies.•The LC-MS was employed to investigate and confirm 3 path of degradation of intermediate products of BPA degradation.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2023.140347