中文摘要：

以静电纺聚四氟乙烯（PTFE）超细纤维为载体,采用浸渍-烧结法制备出PTFE超细纤维负载二氧化钦（TiO2）催化膜。研究了该催化膜在紫外光下,不同反应条件对亚甲基蓝的光催化降解性能影响,探讨了负载型TiO2光催化剂的循环回收利用率。结果表明：通过浸渍-烧结法可以成功制备出PTFE超细纤维负载TiO2光催化膜,经450℃煅烧后TiO2为锐钛矿晶型;在波长为365 nm,功率为300 W的紫光灯照射55 min,浸渍负载5h制备的TiO2/PTFE超细纤维催化膜对初始浓度为5 mg/L,体积100 ML的亚甲基蓝溶液催化降解除率可达99%;在经过5次循环后,催化剂对亚甲基蓝的降解率仍达46%,回收利用率较高。

英文摘要：

Polytetrafluoroethylene （PTFE） nanofibers were prepared by an electrostatic spinning technology. Titanium dioxide （TiO2） particles were loaded on the PTFE nanofibers via dipping and sintering. The morphology and structure of the photocatalyst film were characterized. Effects of reacting conditions of the TiO2/PTFE superfine-fiber film on the photocatalytic degradation of methylene blue under UV-Vis light irradiation were investigated. In addition, the recycling utilization of load type TiO2 light catalyst was also discussed. The result show that the TiO2（as anatase）/PTFE nanofiber photocatalyst film was obtained after calcination at 450 ~C. Under the violet light （300 W, 365 nm） irradiation, when irradiation distance is 30 cm and after irradiation for 55 rain, the TiO2/PTFE superfine-fiber film is prepared by dipping for 5 h. Its degradation rate for methylene blue with initial concentration of 5 mg/L and volume of 100mL is 99%. The degradation efficiency of methylene blue is still 46% after recycling for 5 times, indicating that the recycling utilization rate is greater.