Ag/MoS_(2)/ZnIn_(2)S_(4)复合光催化剂的制备及其光催化降解和还原性能研究  

Study on the preparation of Ag/MoS_(2)/ZnIn_(2)S_(4)composite photocatalysts and their photocatalytic degradation and reduction performance

作　　者：王兰 张硕 岳峰 马威浩 谭棒 张宏忠 Wang Lan;Zhang Shuo;Yue Feng;Ma Weihao;Tan Bang;Zhang Hongzhong(Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration of Henan Province,College of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001)

机构地区：[1]郑州轻工业大学材料与化学工程学院,环境污染治理与生态修复河南省协同创新中心,郑州450001

出　　处：《化工新型材料》2024年第12期213-219,227,共8页New Chemical Materials

基　　金：河南省科技攻关计划项目(202102310282,242102320100)。

摘　　要：首先采用溶剂热法制备片层结构组装而成的花朵状二硫化钼/硫化铟锌(MoS_(2)/ZnIn_(2)S_(4))微球异质结构,该方法实现了ZnIn_(2)S_(4)和MoS_(2)间紧密的界面接触,形成了良好的电子传输通道有利于光生电荷载流子的传输。其次利用光沉积法将Ag纳米粒子负载在MoS_(2)/ZnIn_(2)S_(4)微球异质结构上,得到三元Ag/MoS_(2)/ZnIn_(2)S_(4)复合光催化剂。得益于Ag纳米粒子的等离子体效应及电子助催化剂作用,Ag/MoS_(2)/ZnIn_(2)S_(4)复合光催化剂在处理高浓度印染废水罗丹明B(RhB)、亚甲基蓝(MB)和六价铬Cr(Ⅵ)的实验中表现出优异的性能,Ag/MoS_(2)/ZnIn_(2)S_(4)对RhB、MB和Cr(Ⅵ)的光催化降解效率和光催化还原效率分别达到100%、100%和99.3%,说明Ag/MoS_(2)/ZnIn_(2)S_(4)具有良好的催化活性。通过X射线衍射仪、扫描电子显微镜、透射电子显微镜、X射线光电子能谱仪和紫外-可见漫反射光谱仪等论证了复合催化剂的优异性能并提出了光催化反应机理。Firstly,a flower-like MoS_(2)/ZnIn_(2)S_(4)microsphere heterostructure with a layered structure was prepared using the solvothermal method.This approach achieved tight interfacial contact between ZnIn_(2)S_(4)and MoS_(2),forming effective electron transport channels that facilitated the transfer of photogenerated charge carriers.Subsequently,Ag nanoparticles were loaded onto the MoS_(2)/ZnIn_(2)S_(4)microsphere heterostructure using the photodeposition method,resulting in a ternary Ag/MoS_(2)/ZnIn_(2)S_(4)composite photocatalyst.Thanks to the plasmonic effect of the Ag nanoparticles and their role as electron co-catalysts,the Ag/MoS_(2)/ZnIn_(2)S_(4)composite photocatalyst exhibited outstanding performance in the treatments of high-concentration textile wastewater containing Rhodamine B(RhB),Methylene Blue(MB),and hexavalent chromium Cr(Ⅵ).The photocatalytic degradation efficiencies for RhB,MB,and the photocatalytic reduction efficiency for Cr(Ⅵ)reached 100%,100%,and 99.3%,respectively,demonstrating the excellent catalytic activity of Ag/MoS_(2)/ZnIn_(2)S_(4).The superior performance of the composite catalysts and the photocatalytic reaction mechanisms were further validated and proposed through X-ray diffraction,scanning electron microscopy,transmission electron microscopy,X-ray photoelectron spectroscopy,and UV-visible diffuse reflectance spectroscopy.

关 键 词：印染废水 Ag/MoS_(2)/ZnIn_(2)S_(4)复合光催化剂 光催化降解与还原 有机染料 六价铬 

分 类 号：X791[环境科学与工程—环境工程]