溶胶凝胶法制备CeO_2/TiO_2光催化材料及其性能研究

Preparation of CeO_2/TiO_2 Photocatalytic Materials by Sol-gel Method and Their Properties

以钛酸四丁酯为钛源、硝酸铈为铈源,通过溶胶凝胶法制备CeO_2/TiO_2复合光催化材料。利用X射线衍射仪和紫外可见分析仪表征样品的组成和光吸收特性。以亚甲基蓝水溶液为模拟污染物,在模拟太阳光下考察样品的光催化性能。结果表明:当焙烧温度为500℃,CeO_2含量为30%时,CeO_2/TiO_2复合物具有最高光催化活性。

CeO2/TiO2 composite photocatalytic materials were prepared by sol-gel method using tetrabutyl titanate and cerium nitrate as Ti and Ce precursors, respectively. X-ray diffractometer and ultraviolet visible analyzer were adopted to investigate the composition and absorption characteristics of the samples. Photocatalytic activity of the samples were tested under simulated sunlight using methylene blue （MB） solution as model contaminant. The results showed that, when the calcination temperature is 500℃ and the CeO2 content is 30%, the CeO2/TiO2 compound exhibited the highest photocatalytic activity.