Multivariate organic acids can modify the structure and morphology of materials to some extent. In this work, the addition of oxalic acid can make the morphology of ZnIn₂S₄ become uniform, the crystal structure of ZnIn₂S₄ can change from cubic to hexagonal, and the photocatalytic activity was improved. The dual Z-scheme ZnIn₂S₄/BiOCl heterojunction was successfully fabricated by a two-step hydrothermal-hydrolytic method. The concept of green chemistry was used to make full use of thiourea, and the rapid decomposition of Rh B and TC was realized by ZIS/BOC-8 under visible light in a shorter period time than other photocatalysts in this system. In order to investigate the relationship between the structure and properties of the catalyst, XRD, FT-IR, SEM, HRTEM, UV-vis DRS, XPS and other characterization technologies were used to analyze the structure, morphology, optical properties of the samples, showing that ZnIn₂S₄/BiOCl have been successfully synthesized indicates the existence of Z-scheme heterojunction structure. PL, TRPL and EIS analysis showed that the Z-scheme heterostructures could rapidly promote the separation of holes and photo-induced electron carriers, enhancing the photocatalytic performance and stability. The photocatalytic degradation results showed that the degradation rate of Rh B and TC by ZIS/BOC-8 were more than 92% within 30 minutes, comparing with other catalyst, ZIS/BOC-8 showed preferable visible light catalytic degradation activity, and the order of catalytic activity was as follows: ZIS/BOC-8 > BiOCl-S > BiOCl, ZnIn₂S₄. Moreover, the degradation pathway of Rh B was discussed by 3D-EEM and LC-MS, and the photocatalytic mechanism of the system was proposed, especially the mechanism of photocatalytic degradation of Rh B by ZIS/BOC under visible light.

多元有机酸在一定程度上可以改变材料的结构和形貌。在这项工作中，加入草酸，可以使日宁的形态₂小号₄变得均匀，日宁的晶体结构₂小号₄可以从立方更改为六边形，且光催化活性得到改善。双 Z 型 ZnIn ₂ S ₄/BiOCl异质结通过两步水热水解法成功制备。利用绿色化学的概念，充分利用了硫脲，在可见光下，ZIS/BOC-8在比其他光催化剂更短的时间内实现了Rh B和TC的快速分解。为了研究催化剂的结构与性能之间的关系，采用XRD、FT-IR、SEM、HRTEM、UV-vis DRS、XPS等表征技术对样品的结构、形貌、光学性质进行了分析，表明 ZnIn ₂ S ₄/BiOCl的成功合成表明Z-scheme异质结结构的存在。PL、TRPL和EIS分析表明，Z型异质结构可以快速促进空穴和光致电子载流子的分离，提高光催化性能和稳定性。光催化降解结果表明，ZIS/BOC-8在30 分钟内对Rh B和TC的降解率均在92%以上，与其他催化剂相比，ZIS/BOC-8表现出较好的可见光催化降解活性，其次催化活性如下：ZIS/BOC-8 > BiOCl-S > BiOCl, ZnIn ₂ S ₄. 此外，通过3D-EEM和LC-MS讨论了Rh B的降解途径，提出了体系的光催化机理，特别是ZIS/BOC在可见光下光催化降解Rh B的机理。