中文摘要：

研究了在无催化剂、纯锐钛矿、纯金红石以及复合催化剂时苯和甲苯的光催化降解情况,考察了反应物初始浓度以及不同催化剂组成时苯和甲苯的光催化降解.结果表明,使用锐钛矿催化剂,苯和甲苯降解效率都有很大提高,而使用金红石催化剂,苯和甲苯降解效率提高的幅度不大,这主要与锐钛矿和金红石的晶体结构有关.在无催化剂和以金红石为催化剂时,甲苯比苯更容易降解;以锐钛矿为催化剂时苯比甲苯更容易降解.初始浓度对苯和甲苯的光催化降解过程有一定的影响,在低浓度时降解速率较快,而在高浓度时降解速率较慢.在锐钛矿催化剂中掺入一定量的金红石可提高催化剂的光催化活性.对于苯,锐钛矿80%、金红石20%的复合催化剂光催化活性最高;而对于甲苯,锐钛矿90%、金红石10%的复合催化剂光催化活性最高.

英文摘要：

Photo-catalytic degradation of gas-phase benzene and toluene were studied in the condition of no catalyst, pure anatase catalyst, pure rutile catalyst and multi-composite catalyst. The influences of initial concentration of reactants and the catalysts of different composite on photocatalytic degradation rate of gas-phase benzene and toluene were investigated. The results show that the degradation efficiency of benzene and toluene is improved a lot on anatase catalyst, but improved a little on rutile catalyst in relation to the crystal-structure of anatase and rutile catalyst. In the condition of no catalyst and pure rutile catalyst, toluene is easier to be degradated than benzene, and on anatase catalyst benzene is easier to be done than toluene. The initial concentration of reactant has an effect on the photo-catalytic degradation process. The degradation rates of benzene and toluene are faster in low concentration than in high concentration. A certain amount of rutile doped in anatase catalyst could improve the photo-catalytic activity. The catalyst with 80% anatase and 20% rutile shows the best photo-catalytic activity to benzene, and the catalyst with 90% anatase and 10% rutile gives the best photo-catalytic activity to toluene.