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.

污染物的光催化降解被认为是一种有前途的废水处理方法，但由于效率低和对降解途径的了解有限而受到阻碍。制备了一种新型氧掺杂多孔gC ₃ N ₄ /富氧空位BiOCl (OCN/OVBOC)异质结构，用于光催化降解双酚A (BPA)。协同缺陷和掺杂工程有利于形成S型机制的强键合界面。_{其中，0.3 OCN/OVBOC表现出最优异的降解率，分别比纯gC 3} N ₄和BiOCl高8倍和4倍。这种优异的性能主要归功于S型异质结结构的强键合界面和氧化还原能力，通过O掺杂和空位调节催化剂的配位激发和电子局域化，显着增强了电荷分离。这项工作提供了关于协同缺陷和掺杂工程在促进强键合S型异质结形成中的作用的重要见解，并最终为高效光催化剂的设计提供了新的思路。