The exploration of effective and stable photocatalysts driven by visible light to eliminate organic pollutants is very important to environmental remediation. In this work, a simple one-pot hydrothermal method was used to successfully prepare a series of type II SnS₂/In₂S₃ heterojunction photocatalysts. The type II heterostructure is very effective in facilitating the separation of photogenerated electron-hole pairs. Therefore, the prepared SnS₂/In₂S₃ heterostructuresexhibited significantly improved photocatalytic performance for the decomposition of organic pollutants, including rhodamine B (RhB) and tetracycline (TC), under visible light illumination. The optimal kinetic constants of photocatalytic degradation of RhB by SnS₂/In₂S₃ are 99.2 times and 15.3 times of the original SnS₂ and In₂S₃, respectively. Besides, the optimal kinetic constants of SnS₂/In₂S₃ for photocatalytic degradation of TC are 118.8 times and 12.8 times of the original SnS₂ and In₂S₃, respectively. The radical capture experiments and electron spin resonance results indicate that ·O₂^– is the main active substance in the reaction system, with h⁺ and ·OH playing auxiliary roles, while further demonstrating the charge transfer mechanism of type II heterojunction. A new insight into the rational design and construction of efficient and stable metal sulfide-based heterojunction photocatalysts will be provided by this work.

探索有效稳定的可见光驱动光催化剂去除有机污染物对环境修复具有重要意义。在这项工作中，采用简单的一锅水热法成功制备了一系列II型SnS ₂ /In ₂ S ₃异质结光催化剂。II型异质结构在促进光生电子-空穴对的分离方面非常有效。因此，制备的SnS ₂ /In ₂ S ₃在可见光照射下，异质结构对有机污染物的分解表现出显着改善的光催化性能，包括罗丹明 B (RhB) 和四环素 (TC)。SnS ₂ /In ₂ S ₃光催化降解RhB的最佳动力学常数分别为原SnS ₂和In ₂ S _{3 的}99.2倍和15.3倍。此外，SnS ₂ /In ₂ S ₃光催化降解TC的最佳动力学常数分别为原SnS ₂和In ₂ S _{3 的}118.8倍和12.8倍， 分别。自由基捕获实验和电子自旋共振结果表明·O ₂ ^-是反应体系中的主要活性物质，h ⁺和·OH起辅助作用，同时进一步证明了II型异质结的电荷转移机制。这项工作将为合理设计和构建高效稳定的金属硫化物基异质结光催化剂提供新的见解。