中文摘要：

以氮等离子体对活性炭纤维表面进行改性,钛酸四丁酯为前驱体水解法负载TiO2,制备了复合光催化剂。用扫描电子显微境（SEM）、X射线衍射（XRD）、氮气吸附法（BET）和X光电子能谱仪（XPS）对样品进行了表征,考察了复合光催化剂降解甲苯的效果。结果表明,表面负载的光催化剂颗粒均匀,为锐钛矿型;活性炭纤维改性后,平均孔径有所减小,微孔表面积增加,表面的羰基和羧基增加,其对应的复合光催化剂的吸附氧物种（O2-）提高了近3%;改性后复合光催化剂降解甲苯的能力优于未改性的样品,当外加电压为11000 V,改性20 min,TiO2负载2次制得的复合光催化剂样品在湿度为40%条件下,降解甲苯效果最好,对含甲苯浓度为2 mg/m^3的气体处理200 min,降解率达97.88%,比未改性样品的效率提高了19.38%。

英文摘要：

A compound photocatalyst is prepared by nitrogen plasma modification of active carbon fibers（ACF） loaded with TiO2 in tetrabutyl titanate hydrolyzing process.The samples are characterized by SEM,XRD,BET and XPS.The performance of compound photocatalyst is investigated by Toluene decomposition.The results show that the homogeneous particles,loaded on the surface of photocatalyst,are anatase.After modification,the average pore size of ACF lessens,the surface area of micropores increases,the surface carbonyl and carboxyl increase and the corresponding absorb species（O-2） of compound photocatalyst increase nearly 3%.The compound photocatalyst after modification has high toluene removing ability.The samples,prepared at voltage of 11 000 V,modified time 20 min and loaded TiO2 twice,have the best toluene removing ability in RH=40%.Its degradation efficiency is up to 97.88%.Compared to modification it increases by 19.38% when the gas samples contain toluene with concentration of 2 mg/m^3 for 200 min.