采用溶胶凝胶法以硫酸氧钛和水玻璃为前驱体制备二氧化钛-二氧化硅复合氧化物，利用XRD、SEM、TEM、BET、激光粒度仪、紫外-可见光谱等测试方法对二氧化钛-二氧化硅复合氧化物材料进行了测试分析，考察了制备条件对二氧化钛-二氧化硅复合氧化物材料的晶相、形貌、孔结构、粒度等物理性质的影响规律，并对其在紫外光区降解罗丹明B（RhB）溶液的性能进行了研究。结果表明：二氧化钛-二氧化硅复合氧化物具有优良的催化活性，其光催化活性明显优于市售的P25二氧化钛，焙烧温度对催化剂性能影响最大。

TiO2-SiO2 composite oxides were prepared by sol-gel method with TiOSO4 and sodium silicate as precursors.TiO2-SiO2 composite oxides were characterized by XRD，SEM，TEM，BET，laser particle size analyzer and UV-Vis.The influence of preparation condition on the physical properties such as crystalline phase，morphology，pore structure and particle size of TiO2-SiO2 composite oxides were investigated.The degradation properties of TiO2-SiO2 composite oxides in Rhodamine B solution under ultraviolet region were investigated.The results showed that TiO2/SiO2 composite oxides possessed an excellent photocatalytic activity which was obviously superior to that of commercial P25 TiO2.The calcination temperature had the greatest influence on the performance of catalyst.