Ag2O-NiTi-LDH复合材料的构建及其光催化氧化乙硫醇性能研究

本文将氧化银（Ag2O）负载到镍-钛层状双金属氢氧化物（NiTi-LDH）上以构建Ag2O-NiTi-LDH复合材料。通过XRD、SEM、TEM、XPS、UV-vis、电化学工作站和FT-IR等技术对样品进行表征。采用静态吸附-光催化的方法对乙硫醇进行吸附氧化降解。结果表明：复合材料中 Ag2O 和 NiTi-LDH 之间存在相互作用，使得 Ag2O-NiTi-LDH复合材料比单一基体材料的带隙能小，光生电子-空穴的分离和迁移效率高；在光催化实验中，单一的基体材料NiTi-LDH 对乙硫醇的光催化效果不明显，Ag2O 和 Ag2O-NiTi-LDH 虽然都能将乙硫醇光催化氧化成硫酸盐，但Ag2O-NiTi-LDH复合材料光催化氧化降解效率高于Ag2O。

Construction of Ag2O-NiTi-LDH Composite and Its Photocatalytic Oxidation of Ethyl Mercaptan

In this paper, Ag2O-NiTi-LDH composites were prepared by loading silver oxide (Ag2O) onto Ni-Ti layered double hydroxide (NiTi-LDH). The samples were characterized by a means of XRD, SEM, TEM, XPS, UV-vis, electrochemical workstation and FT-IR technologies. The adsorption and photocatalytic performance of samples on ethyl mercaptan were evaluated by static adsorption-photocatalytic method. The results show that there is an interaction between Ag2O and NiTi-LDH, which makes the bandgap energy of Ag2O-NiTi-LDH composite lower than that of its precursors, and the efficiency of separation and migration of photo -generated electron-hole is higher. In the photocatalytic experiment, a single precursor NiTi-LDH has no obvious photocatalytic effect on ethyl mercaptan. Both Ag2O and Ag2O-NiTi-LDH can photocatalytic oxidize ethyl mercaptan to sulfates, however, the photocatalytic degradation efficiency of the composite Ag2O-NiTi-LDH has a much higher than that of Ag2O.