本文采用十六烷基三甲基溴化铵对钠基膨润土进行改性,并以有机改性膨润土作为载体,采用超声辅助溶胶-凝胶法制备了镧掺杂TiO2/有机改性膨润土复合光催化材料,采用X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱和紫外-可见漫反射吸收光谱(DRS)等测试技术对其进行了表征分析,以TNT溶液作为目标物,考察了复合材料的吸附性能和光催化性能。结果表明:膨润土的有机改性抑制了TiO2的晶粒生长,增强了复合材料的吸光性能,提高了复合材料的吸附和光催化性能。 In this paper, cetyl trimethyl ammonium bromide modified sodium bentonite, and organic modified bentonite as a carrier, the use of ultrasound-assisted sol-gel method lanthanum doped TiO2 / organic modified bentonite composite light The catalytic materials were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) and ultraviolet-visible diffuse reflectance absorption spectroscopy (DRS). TNT solution was used as the target material, The adsorption and photocatalytic properties of the composites were investigated. The results show that the organic modification of bentonite inhibits the grain growth of TiO2, enhances the light absorbency of the composite and enhances the adsorption and photocatalytic activity of the composites.