In this study, MoS₂@Z photocatalysts were synthesized by combining ultrasonic and hydrothermal methods, and used for the degradation of tetracycline. The structure characteristics and photocatalytic degradation mechanism of photocatalysts were also systematically investigated. The obtained MoS₂@Z-5 exhibits the highest photo-degradation efficiency of tetracycline (87.23%), which is 3.58 times more than alkali-modified zeolite (24.34%) and 1.80 times more than pure MoS₂ (48.53%). Furthermore, the MoS₂@Z-5 showed significant stability in three times photocatalytic recycles and the removal efficiency only decrease by 9.03%. Crystal structure and micromorphology analysis show modified zeolite with collapsed structure can regulate the morphology of nano-MoS₂ and make MoS₂ appear fault structure, which can expose more active sites. In addition, low Si/Al ratio zeolite increases the hydrophilia of MoS₂@Z-5. Reactive-species-trapping experiments show that the hole is the main reactive oxidizing species. The superior photo-degradation efficiency is mainly attributed to outstanding hydrophilia, exposure of the edge active sites, and efficient separation of photogenerated charge and holes. A possible photocatalytic mechanism and degradation pathways of tetracycline were proposed. The results indicate that MoS₂@Z-5 may become an efficient, stable, and promising photocatalyst in tetracycline wastewater treatment.

在本研究中，结合超声和水热法合成了MoS ₂ @Z 光催化剂，并将其用于四环素的降解。还系统地研究了光催化剂的结构特征和光催化降解机理。获得的MoS ₂ @Z-5 表现出最高的四环素光降解效率（87.23%），是碱改性沸石（24.34%）的3.58倍，是纯MoS ₂（48.53%）的1.80倍。此外，MoS ₂@Z-5 在 3 次光催化循环中表现出显着的稳定性，去除效率仅下降 9.03%。晶体结构和微观形貌分析表明，具有塌陷结构的改性沸石可以调节纳米MoS ₂的形貌，使MoS ₂出现断层结构，从而暴露更多的活性位点。此外，低 Si/Al 比沸石增加了 MoS ₂的亲水性@Z-5。活性物种捕获实验表明，空穴是主要的活性氧化物种。优异的光降解效率主要归功于出色的亲水性、边缘活性位点的暴露以及光生电荷和空穴的有效分离。提出了四环素可能的光催化机理和降解途径。结果表明，MoS ₂ @Z-5 可能成为四环素废水处理中一种高效、稳定且有前景的光催化剂。