中文摘要：

以钛酸丁酯[Ti（C4H9O）4]为钛源、硝酸铈[Ce（NO3）3·6H2O]为改性剂,采用溶胶-凝胶法合成了掺Ce的TiO2催化剂,最佳掺Ce量为1.5%（mol）,煅烧温度为500℃.采用X射线衍射、差热、紫外-可见光谱对其结构进行了表征.结果表明,500℃时煅烧的掺Ce1.5%的TiO2催化剂晶粒平均粒径为17.3nm,其光谱吸收边带发生了红移,吸收强度增大.Ce-TiO2光催化剂用量为10g/L,80W日光灯照射240min,对2μg/mL甲醛溶液的光催化降解率达38.75%.

英文摘要：

Titanium dioxide sol was synthesized by sol-gel method with adulteration of Ce（NO3）3·6H2O. The samples were characterized by XRD, DTA and UV-Vis. The results show that the average diameter of Ce-TiO2 particles is 17.3 nm when the Ce-doped 1.5%（mol）, is calcined at 500℃. From the UV-Vis spectra the absorption edge of Ce-doped titania has a red shift and the absorption intensities are increased. The degradation rate of formaldehyde reaches 38.75% when the dosage of photocatalyst is optimally 10 g/L and 240 min illumination is provided with an 80 W fluorescent lamp.