Constructing a Z-scheme photocatalytic system offers great advantages for boosting photocatalytic performance due to its effective charge carrier transfer and strong redox capability. Herein, Cu₂S/CuS nanosheets heterojunction were prepared by a facile one-pot solvothermal method. CuS/Cu₂S Z-scheme heterojunction realized rapid bacteria-killing under near-infrared (NIR) irradiation. The optimized CuS/Cu₂S (CuS/Cu₂S-1) achieved 99 % antibacterial efficiency against Escherichia coli (E. coli) within 10 min NIR irradiation. Owing to the optimization of CuS/Cu₂S-1 Z-scheme heterojunction, the efficient interfacial charge separation was realized, thereby resulting in a high yield of reactive oxygen species. Moreover, the heterojunction exhibited locally a higher temperature under NIR irradiation, favorable for eradicating bacteria. In addition, radical scavenging tests and ESR spectra results showed that ⋅O₂^–, ⋅OH and ¹O₂ were main active species responsible for sterilization. Under the synergy of photocatalytic and photothermal effects, the membrane structure of bacteria was severely damaged in CuS/Cu₂S-1 system. This study not only offers a reliable approach for photothermocatalytic inactivation, but also affords the bases for the development of Z-scheme heterojunction aimed at designing highly efficient photocatalysts.

由于其有效的载流子转移和强大的氧化还原能力，构建 Z 型光催化体系为提高光催化性能提供了巨大的优势。在此，通过简便的一锅溶剂热法制备了Cu _{2 S/CuS 纳米片异质结。}CuS/Cu ₂ S Z型异质结实现了近红外（NIR）照射下的快速杀菌。优化后的 CuS/Cu ₂ S (CuS/Cu ₂ S-1)在近红外辐射 10 分钟内对大肠杆菌( E. coli ) 的抗菌效率达到 99%。由于 CuS/Cu _2的优化S-1 Z型异质结，实现了高效的界面电荷分离，从而获得高产率的活性氧。此外，异质结在 NIR 照射下局部表现出更高的温度，有利于根除细菌。此外，自由基清除试验和ESR光谱结果表明，⋅O ₂ ^–、⋅OH和¹ O ₂是负责杀菌的主要活性物质。在光催化和光热效应的协同作用下，细菌膜结构在CuS/Cu _{2中严重受损}S-1系统。该研究不仅为光热催化失活提供了可靠的方法，而且为开发旨在设计高效光催化剂的 Z 型异质结提供了基础。