School of Chemistry and Chemical Engineering, National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing, 210094, China.
School of Chemistry and Chemical Engineering, National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing, 210094, China; Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China.
Chemosphere. 2023 Dec;344:140347. doi: 10.1016/j.chemosphere.2023.140347. Epub 2023 Oct 2.
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-CN/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-CN 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.
光催化降解污染物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理解有限而受到阻碍。本研究制备了一种新型的氧掺杂多孔 g-CN/富氧空位 BiOCl（OCN/OVBOC）异质结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强结合界面以实现 S 型机制。其中，0.3 OCN/OVBOC 表现出最优异的降解速率，分别是纯 g-CN 和 BiOCl 的 8 倍和 4 倍。这种优异的性能主要归因于通过强结合界面和 S 型异质结结构的氧化还原能力显著增强了电荷分离，通过 O 掺杂和空位来调节催化剂的配位激发和电子定域化。这项工作为协同缺陷和掺杂工程在促进强结合 S 型异质结形成中的作用提供了重要的见解，并为设计高效光催化剂提供了新的思路。
