TiO2-PTFE光催化膜的制备及性能

聚四氟乙烯

TiO2-PTFE光催化膜的制备及性能
王永强 赵朝成 赵东风 王志伟 安慧中国石油大学（华东）环境科学与工程系,山东东营257061

摘　要:以聚四氟乙烯（PTFE）乳液和纳米TiO2粉末为原料，采用无水乙醇为溶剂，经辊压后与不锈钢网结合，制备了多孔固定化TiO2-PTFE光催化膜。膜性能研究结果表明，m（TiO2）：m（PTFE）=4时，光催化反应处理质量浓度为20mg／L的苯甲酸溶液，2h内TOC去除率高达81．3％。通过扫描电子显微镜观察，TiO2-PTFE光催化膜表面平整，且孔隙分布均匀。TiO2最佳负载量为15mg／cm2。在优化反应条件下同悬浮态TiO2光催化反应体系相比，TiO2-PTFE光催化膜对光源有更高的利用率，表现出更佳的催化活性。[著者文摘]

关键词:光催化 固定化 纳米TiO2 聚四氟乙烯
分类号:　O647.11 O643[著者标引]文献标识码：A文章编号：1006-1878（2008）03-0274-04栏目信息：材料与药剂
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Preparation of TiO2-PTFE Photocatalytic Membrane and Its Photocatalytic ActivityWang Yongqiang ,Zhao Chaocheng, Zhao Dongfeng, Wang Zhiwei,An Hui Department of Environmental Science and Engineering, China University of Petroleum, Dongying Shandong 257061, ChinaAbstract: Porous TiO2/PTFE photocatalytic membrane was prepared using nanometer titanium dioxide and polytetrafluoroethylene emulsion as raw materials and absolute alcohol as solvent, and immobilized on stainless steel web net by rolling. When the mass ratio of TiO2 to PTFE is 4 ： 1, the removal of TOC is 81.3% in the treatment of photocatalytic benzoic acid solution for 2 hours. The TiO2/PTFE membrane exhibits a flat surface with uniform holes. The optimum loading of TiO2 is 15 mg/cm2. TiO2/PTFE membrane can absorb more light energy and exhibits higher activity than aqueous suspension TiO2.[著者文摘]

Key words:photocatalytic; immobilization; nanometer titanium dioxide; polytetrafluoroethylene