玻璃珠负载中孔TiO_2纳米薄膜光催化研究

TiO_2 Mesoporous Film Photocatalyst Supported on Glass Beads

采用玻璃珠为基底材料,钛酸正丁酯为前驱物,PEG400为造孔剂制备了TiO2中孔纳米薄膜.利用SEM、TEM、AES和Raman光谱研究了薄膜的表面性能和结构特性.利用甲醛为探针分析,研究了该薄膜的光催化活性,并讨论了其催化活性与结构特性的关系.结果表明,该薄膜催化剂具有高催化活性和长催化寿命.且当膜层为3层(对应薄膜厚度约为210nm),PEG添加量为15％,400℃煅烧2h制备条件最佳.

TiO2 mesoporous films with aperture in about 4similar to5nm as photocatalyst on glass beads were synthesized by using the sol-gel method with TBT as the precursor and PEG400 as the template and characterized by SEM, TEM, AES and Raman techniques. The effects of Dipping time, the concentration of PEG and calcining time on the photocatalytic activity of TiO2 film were studied on the evaluating equipment designed by ourselves. The best photocatalyst can be obtained when the sol containing 15% PEG 400 and the film about 210nm thick and calcined at 400degreesC for 2h.