Atrazine in aquatic environment poses a potential threat to human health and ecological system, and photocatalytic technology exhibits a promising prospect for eliminating trace pollutants in water. Four photocatalysts, ZnI₂S₄ (ZIS) and other three ZIS-based catalysts, g-C₃N₄/ZIS (CZIS), BiOBr/ZIS (BZIS)and Pd-ZIS (PZIS), were prepared by a facile hydrothermal method and characterized by BET, UV–vis DRS, SEM, TEM, XRD and XPS, respectively. It showed that four catalysts had high photocatalytic activities for atrazine degradation under different light sources irradiation, and their active sequence was PZIS < CZIS < ZIS < BZIS. The stronger light intensity the higher photocatalytic efficiency. Under direct solar irradiation of 1 h, the degradation efficiency for 20 mg/L of atrazine solution reached 90 % by PZIS with a dosage of 0.5 g/L. Pd doping increased the specific surface area and shortened the band gap and particle size of the catalyst that resulting in an effective enhancement of photocatalytic activity in the process of atrazine degradation. It confirmed by laser that Pd²⁺ ion entered the internal structure of ZIS to affect the crystal phase slightly but prohibit the recombination of photogenerated electron-hole pairs effectively. A feasible photocatalytic mechanism of atrazine by PZIS was proposed in the paper. The research work verified high photocatalytic activity of PZIS for its further application in the purification of aquatic environment that polluted by various herbicides including atrazine.

水环境中的r去津对人类健康和生态系统构成潜在威胁，光催化技术在消除水中痕量污染物方面具有广阔的前景。四种光催化剂ZnI ₂ S ₄（ZIS）和其他三种基于ZIS的催化剂gC ₃ N ₄/ ZIS（CZIS），BiOBr / ZIS（BZIS）和Pd-ZIS（PZIS）是通过简便的水热法制备的，分别用BET，UV-vis DRS，SEM，TEM，XRD和XPS表征。结果表明，四种催化剂在不同光源照射下对at去津具有较高的光催化活性，其活性顺序为PZIS <CZIS <ZIS <BZIS。光强度越强，光催化效率越高。在1 h的直接太阳辐射下，剂量为0.5 g / L的PZIS对20 mg / L r去津溶液的降解效率达到90％。钯的掺杂增加了比表面积并缩短了催化剂的带隙和粒径，从而有效提高了enhancement去津降解过程中的光催化活性。激光确认Pd ²⁺离子进入ZIS的内部结构对晶体相的影响很小，但有效地阻止了光生电子-空穴对的重组。提出了一种可行的PZIS光催化of去津的机理。研究工作证实了PZIS具有较高的光催化活性，可将其进一步用于纯化被阿特拉津等各种除草剂污染的水生环境。