采用浸渍法制备K8SiMo11O39·2H2O/TiO2复合材料。用IR、XRD、TG-DTA等方法进行了表征。用N2吸附-脱附等温线考察了催化剂的比表面、孔径,表明产物为介孔材料。以标题化合物作为光催化剂催化降解甲基橙,探讨催化剂用量、甲基橙的初始浓度、过氧化氢的用量等条件对甲基橙脱色率的影响,结果表明:催化剂加入量为80 mg·L-1、甲基橙的初始浓度为10 mg·L-1,H2O2的用量为10 mL·L-1时,脱色率达到92%。 Preparation of K8SiMo11O39 · 2H2O / TiO2 composite by impregnation method. IR, XRD, TG-DTA and other methods were characterized. The N2 adsorption-desorption isotherms were used to investigate the specific surface area and pore size of the catalyst, indicating that the product is a mesoporous material. The title compound was used as photocatalyst to degrade methyl orange. The effects of catalyst dosage, initial methyl orange concentration and hydrogen peroxide dosage on the decolorization rate of methyl orange were investigated. The results showed that the catalyst dosage was 80 mg · L -1, the initial concentration of methyl orange was 10 mg · L-1, the decolorization rate was 92% when the amount of H2O2 was 10 mL · L-1.