采用溶胶－凝胶法，以钛酸丁酯为前驱体，以不同添加量的聚乙二醇（ＰＥＧ，分子量２０００）为添加剂． 在普通载玻片上制备结构可控的多孔ＴＩＯ２纳米薄膜。结果表明：通过调节ＰＥＧ添加量，可以有效地调控薄 膜的结构（如孔径和孔分布），增大比表面积，进而可提高光催化活性。

Influence of PEG Addition on the Properties of TiO_2 Thin Films Chen Wenmei Zhao XiujianTiO2 porous nanometer thin films with controlled structure desposited on slide glass substrates were prepared from TiO2 sol ln the presence of PEG by sol-gel method. The results showed that the addition of PEG could adjust the morphology of thin films, such as pore size and pore distribution. As a result, it has been found that the specific surface area was increased and the phutocatalytic activity was improved.Sol-Gel; PEG ; TiO2 porous nanometer thin films ; controlled structure; photocatalysis