Optimum specific photocatalytic activity was found in the film prepared by EPD from TiO2 solcontaining 50g/L PEG, which was 9 times more than that of the film prepared from sol without PEG.

• 当给溶胶中添加50 g/L PEG时，可得到高比光催化活性的TiO2薄膜，其对乙烯的光催化活性比未加PEG时得到的电泳膜的活性高8倍多。