物理化学学报 >> 2001, Vol. 17 >> Issue (03): 261 -264 .doi: 10.3866/PKU.WHXB20010316

研究论文 上一篇    下一篇

TiO2/SiO2纳米薄膜的光催化活性和亲水性

余家国;赵修建;陈文梅;林立;张艾丽   

  1. 武汉理工大学材料复合新技术国家重点实验室,武汉 430070
  • 收稿日期:2000-10-08 修回日期:2000-11-02 发布日期:2001-03-15
  • 通讯作者: 余家国 E-mail:yujiaguo@public.wh.hb.cn

Photocatalytic Activity and Hydrophilic Property of TiO2/SiO2 Composite Nanometer Thin Films

Yu Jia-Guo;Zhao Xiu-Jian;Chen Wen-Mei;Lin Li;Zhang Ai-Li   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Process ing Wuhan University of Technology,Wuhan 430070
  • Received:2000-10-08 Revised:2000-11-02 Published:2001-03-15
  • Contact: Yu Jia-Guo E-mail:yujiaguo@public.wh.hb.cn

摘要: 通过solgel工艺在钠钙玻璃表面制备了均匀透明的TiO2/SiO2复合纳米薄膜.实验结 果表明: 当SiO2添加量较高时, TiO2/SiO2复合纳米薄膜的光催化活性明显降低;当SiO2添加 量较低时,TiO2/SiO2复合薄膜的光催化活性无明显变化.在TiO2薄膜中添加SiO2,可以抑制薄 膜中TiO2晶粒的长大,同时薄膜表面的羟基含量增加, 水在复合薄膜表面的润湿角下降, 亲 水能力增强.当SiO2含量为10%-20%(摩尔分数)时获得了润湿角为0°的超亲水性薄膜.

关键词: TiO2/SiO2复合纳米薄膜, 溶胶-凝胶工艺, 光催化活性, 超亲水性

Abstract: The uniform transparent TiO2/SiO2 composite nanometer thin films were prepared via solgel processing on the soda lime glass substrates.The photocata lytic activity of the asprepared TiO2/SiO2 composite nanometer thin films obvi ously decreases when the amount of SiO2 addition is large.However,the photocatal ytic activity has no obvious change when the amount of SiO2 addition is small (T able 2).The addition of SiO2 can suppress the grain growth of TiO2 crystal,incre ase the hydroxyl content of TiO2 film,decrease the contact angle for water of Ti O2 films and enhance the hydrophilic property of TiO2 films.The superhydrophil ic TiO2/SiO2 composite nanometer films with the contact angle of 0o were obtaine d by the addition of 10%20% (mole fraction) SiO2.

Key words: TiO2/SiO2 composite nanometer thin films, Sol-gel processing, Phot ocatalytic activity, Super-hydrophilic property