Designing and synthesizing visible-light-driven photocatalysts with superior photocatalytic performance for purifying polluted water is deemed to be a preferred tactics in settling environmental pollution. Herein, an original intercalated Z-scheme Bi₂O₄/g-C₃N₄ (BC) composite photocatalyst is successfully synthesized via calcination-hydrothermal means. The optimized 5BC composite photocatalyst (0.03567 min⁻¹) shows dramatically improved photocatalytic activity compared with pure Bi₂O₄ (0.02204 min⁻¹) and g-C₃N₄ (0.00623 min⁻¹) in degrading 2-Mercaptobenzothiazole (MBT), which could be ascribed to the synergistic effect of the intercalation structure and the Z-scheme heterojunction, thereby realizing spatial charge separation and visible light adsorption. Additionally, the 5BC heterojunction photocatalyst exhibits good stability in terms of catalytic activity and structure after 4 cycles of experiments. From the perspective of free radical trapping experiments and ESR, the degradation of MBT is mainly controlled by O₂^- and h⁺ and follows the Z-scheme degradation mechanism. We also certificate that H₂O₂ produced during MBT degradation plays a momentous function through POPHA fluorescence detection method. Therefore, this work provides an alternative to building high performance and low cost photocatalysts for controlling environmental pollution.

设计和合成具有优异光催化性能的可见光驱动光催化剂以净化污水被认为是解决环境污染的首选策略。在此，通过煅烧-水热法成功地合成了原始的插层Z-方案Bi ₂ O ₄ / gC ₃ N ₄（BC）复合光催化剂。与纯Bi ₂ O ₄（0.02204 min ^-1）和gC ₃ N ₄（0.00623 min ^-1）相比，优化的5BC复合光催化剂（0.03567 min ^-1）显示出显着改善的光催化活性。）降解2-巯基苯并噻唑（MBT），这可以归因于插层结构和Z型异质结的协同作用，从而实现空间电荷分离和可见光吸附。另外，在4个实验周期后，5BC异质结光催化剂在催化活性和结构方面表现出良好的稳定性。从自由基捕获实验和ESR的角度来看，MBT的降解主要是被O控制₂ ^-和H ⁺，并遵循Z-方案降解机制。我们还证明H ₂ O ₂通过POPHA荧光检测方法，MBT降解过程中产生的蛋白起着重要作用。因此，这项工作为构建高性能和低成本的光催化剂以控制环境污染提供了一种替代方法。