TiO2/ACF的制备及光催化降解四氯乙烯性能

以钛酸四丁酯为前驱物,活性炭纤维(ACF)为载体,蔗糖为胶粘剂,采用真空吸附水解的方法制得了TiO₂/ACF催化剂.采用BET、XRD、SEM等手段对其物理化学特性进行表征,以四氯乙烯光降解反应为探针反应,考察了TiO₂/ACF催化剂的光催化降解性能.实验结果表明,采用真空吸附水解法可以将TiO₂很好地负载到活性炭纤维表面上.通过优化条件制备的TiO₂/ACF催化剂在光照2h条件下,可以将水中溶解量的四氯乙烯降解90%以上.催化剂可以多次循环使用,光催化反应活性不变.

Preparation of TiO2/ACF Catalysts and Their Photodegradation on Tetrachloroethylene

Photocatalysts of TiO2 supported on activated carbon fibre(ACF) were prepared by means of vacuum adsorption-hydrolysis method,using sucrose as a binder between TiO2 and ACF.The TiO2/ACF catalysts were characterized by BET,XRD,and SEM.The photodegradation activity of TiO2/ACF was investigated using tetrachloroethylene(TCE) as a probe molecule.The results indicate that TiO2 can be loaded on the surface of the ACF perfectly through the vacuum absorption-hydrolysis method.The photodegradation yield of TCE in aqueous solution is beyond 90% using the catalyst prepared in optimum method under the UV-visible light irradiation for two hours.The catalyst can be recycled several times without losing its photocatalytic activity.