Ce-SiO2-TiO2三元复合催化剂的制备及其光催化降解性能

摘要

采用溶胶-凝胶法制备了Ce-SiO2-TiO2三元复合纳米催化剂,用TG-DTA、FT-IR、XRD和UV-Vis等对样品的结构进行了表征,并以罗丹明B(RhB)作为探针反应,分别在紫外光和可见光照下评价了其光催化性能.与TiO2一元纳米催化剂和Ce-TiO2、SiO2-TiO2二元纳米催化剂进行对比,Ce-SiO2-TiO2三元复合纳米催化剂对罗丹明B溶液(5 mg/L)表现出更高的光催化降解性能,可见光下的降解率达到98.5%.%The ternary composite nano photocatalysts of Ce-SiO2-TiO2 were prepared by sol-gel meth-od, which were characterized by TG-DTA, FT-IR, XRD and UV-Vis. The photocatalytic activities of Ce-SiO2-TiO2 nanocomposites were investigated for the degradation of Rhodamine B (RhB) as a probe under the il umina-tion of UV and visible light. Compared with the photocatalytic activities of TiO2, Ce-TiO2 and SiO2-TiO2, the ter-nary composite nano photocatalyst of Ce-SiO2-TiO2 showed the highest photodegradation, and the photodeg-radation rate of RhB (5 mg/L) could reach above 98.5%under visible light.