以钛酸四异丙酯为原料配制成胶体 ,在玻璃管表面制备了 Ti O2 薄膜光催化剂。用该催化剂光催化降解四氯乙烯 ,并进行薄膜厚度与光解率关系以及催化剂寿命实验。结果表明 ,其光催化效率接近 Ti O2 粉末悬浮体系 ,薄膜以厚度 60 0— 80 0 nm为宜 ,使用 10 0 h,Ti O2 薄膜的光催化活性没有减弱 ,可连续使用 Titanium tetraisopropyl titanate was prepared as a colloid, and a Ti O2 thin film photocatalyst was prepared on the surface of the glass tube. The photocatalytic degradation of tetrachlorethylene with the catalyst, and the relationship between the film thickness and photolysis rate and catalyst life experiment. The results show that the photocatalytic efficiency is close to the Ti O2 powder suspension system, the thickness of the film is 60 0-80 000 nm, and the photocatalytic activity of Ti O2 film is not weakened after 10 h. The photocatalytic activity can be continuously used