中文摘要：

通过改性Hummer法及溶胶凝胶法，制备出TiO2-石墨烯光催化复合材料．经吸附-光催化活性实验选出光催化活性最高的含C量为1．5％（质量分数）的TiO2-石墨烯复合材料，并在自行设计的模拟大型客机环境的气相光催化反应器中，进行O3光催化降解实验研究．结果表明，TiO2-石墨烯复合光催化材料在较短时间内对O3有较高的降解效率，且其光催化活性显著优于纯Ti02材料．初始03浓度为（0．150—0．200）×10^-6时，复合光催化剂受紫外光激发60min的光催化降解率为66．12％，初始O3浓度为（0．950～1．000）×1016时，其光催化降解率约为77％，较低浓度时（（0．100～0．150）×1016），O3去除率也能达到45．45％．此外，通过探讨光催化材料的重复使用性能，表明复合光催化剂重复使用4次以内，其对O3的光催化降解率保持基本稳定．

英文摘要：

The TiO2-graphene composite photocatalytic were synthesized by modified Hummers＇ method and the sol-gel method. The highest photocatalytic activity of TiO2-graphene was selected by adsorption-photocatalytic activity experiments, and confirmed that the 1.5wt% of C content is the material. The 03 photocatalytic degradation experiments were conducted in the self-designed gas-phase photocatalytic reactor, which was modeled on the large passenger aircraft. Experimental results showed that 03 can be more efficiently removed by TiO2-graphene composite photocatalyst materials and its photocatalytic degradation activity was significantly higher than pure TiO2 material. The initial 03 concentration was （ 0. 150 - 0. 200 ） x 10 -6, the composite photocatalyst was excited under UV for 60 min and the photocatalytic degradation rate could be 66.12%. Besides, the degradation rate would rise to about 77%, when the initial 03 concentration was （0.950 - 1. 000） x 10-6. While under the lower concentrations （ （0. 100 -0. 150） x 10-6 ） , the 03 removal rate dropped to 45.45%. In addition, the photocatalytic materials could be stable to photocatalytic degradation of O3 , if the composite was reused less than 4 times.