摘要
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.
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.
出处
《感光科学与光化学》
EI
CSCD
2007年第2期123-129,共7页
Photographic Science and Photochemistry
基金
国家自然科学基金(20543001)
关键词
活性炭纤维
二氧化钛
四氯乙烯
光催化降解
activated carbon fibres
titanium dioxide
tetrachloroethylene
photodegradation
