Abstract: A compound catalyst of CNTS-TiO₂ was prepared by means of sol-gel process using tetrabutylorthotitanate as precursors and glacial acetic acid as depressor, which was at a certain proportion, added into alkyd varnish to prepare the title self-cleaning coatings. The photo-degradation effect on methylene blue was tested. The results indicated that the CNTS -TiO₂ showed higher photocatalytic activity than that of TiO₂, The photocatalytic kinetics of caotings were studied.

Key words: CNTS-TiO₂, methylene blue, degradation, self-cleaning coating, kinetics

摘要： 以钛酸四丁酯为前驱体,冰醋酸为水解抑制剂,用溶胶-凝胶法制备了碳纳米管-TiO₂（CNTs-TiO₂）复合催化剂。将复合催化剂添加到醇酸树脂中制备自洁涂层。测定了该复合涂层对表面吸附亚甲基蓝的光降解活性。结果表明:添加了复合CNTs-TiO₂催化剂的涂层较纯TiO₂有较高的光催化活性。同时还对涂层光催化动力学进行了研究。

关键词: CNTs-TiO₂, 亚甲基蓝, 降解, 自洁涂层, 动力学