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玻璃珠负载中孔TiO2纳米薄膜光催化研究

何俣1; 朱永法1,2; 喻方1   

  1. 1. 清华大学化学系 北京; 100084; 2. 清华大学碳一化学国家重点实验室, 北京 100084
  • 收稿日期:2003-03-17 修回日期:2003-05-19 出版日期:2004-03-20 网络出版日期:2004-03-20

TiO2 Mesoporous Film Photocatalyst Supported on Glass Beads

HE Yu1; ZHU Yong-Fa1,2; YU Fang1   

  1. Department of Chemistry; Tsinghua University; Beijng 100084; China; Carbon-Chemistry State Key Laboratory; Tsinghua University, Beijing 100084; China
  • Received:2003-03-17 Revised:2003-05-19 Published:2004-03-20 Online:2004-03-20

摘要: 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.

关键词: TiO2, 中孔薄膜, 玻璃珠基底, 甲醛, 光催化

Abstract: TiO2 mesoporous films with aperture in about 4-5nm 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 400℃ for 2h.

Key words: TiO2, mesoporous film, glass beads as substrate, formaldehyde, photocatalysis

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