以提纯硅藻土为载体原料,钛酸四丁酯为TiO2前驱体,采用溶胶-凝胶法制备纳米TiO2/硅藻土复合材料。通过XRD、SEM对复合材料晶型结构和形貌表征分析,以甲基橙为目标污染物,考察复合材料对甲基橙光催化性能影响。结果表明:TiO2负载量为37.67%制备的复合材料光催化活性最好,TiO2为锐钛矿和金红石混晶型。甲基橙溶液初始浓度为10mg/L,催化剂用量为2g/L,Ph=2时,甲基橙溶液降解效果最好。 The diatomite was used as the carrier material and tetrabutyl titanate was used as the precursor of TiO2. The nano-TiO2 / diatomite composite was prepared by sol-gel method. The crystal structure and morphology of the composite were characterized by XRD and SEM. Methyl orange was taken as the target pollutant to investigate the effect of the composite on the photocatalytic activity of methyl orange. The results showed that the photocatalytic activity of the composites prepared with 37.67% TiO2 was the best, TiO2 was anatase and rutile mixed crystal. Methyl orange solution initial concentration of 10mg / L, the amount of catalyst 2g / L, Ph = 2, methyl orange solution degradation best.