In this study, we report a facile and green strategy to produce graphitic carbon nitride quantum dots (g-C₃N₄ QDs)/BiVO₄ Z-scheme nanoheterostructure, which is composed by g-C₃N₄ QDs assembled on the surface of mesh-like BiVO₄ crystals. As compared with pure BiVO₄, the g-C₃N₄ QDs/BiVO₄ composite showed significantly enhanced photocatalytic performance towards degradation of rhodamine B (RhB) and Tetracycline (TC) under visible light irradiation, which is attributed to the increased surface area, (increased number of photocatalytically active sites) and the improved efficiency of separation of photogenerated electron-hole pairs through an efficient charge transfer Z-scheme system. The stability and durability of photocatalyst are also discussed in detail. Moreover, the possible enhanced photocatalytic mechanism was put forwarded and explained by the electron spin resonance (ESR) spin-trap technique and active species trapping experiments. The successful implementation of this work will have guiding significance for the preparation of photocatalysts, and provide theoretical basis and experimental guidance for future development of Z-scheme photocatalytic mechanism of the hybrid photocatalysts with better performance.

在这项研究中，我们报告了一种简便且绿色的策略来生产石墨化的氮化碳量子点（gC ₃ N ₄ QDs）/ BiVO ₄ Z方案纳米异质结构，该结构由组装在网状表面上的gC ₃ N ₄ QD组成BiVO ₄晶体。与纯BiVO ₄相比，gC ₃ N ₄ QDs / BiVO ₄复合材料在可见光照射下对罗丹明B（RhB）和四环素（TC）的降解表现出显着增强的光催化性能，这归因于表面积增加（光催化活性位点数量增加）和光生电子分离效率提高。孔对通过有效的电荷转移Z方案系统。还详细讨论了光催化剂的稳定性和耐久性。此外，提出了可能的增强光催化机理，并通过电子自旋共振（ESR）自旋俘获技术和活性物种俘获实验进行了解释。这项工作的成功实施将对光催化剂的制备具有指导意义，