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无机材料学报

• 研究论文 • 上一篇    下一篇

负载型TiO2光催化薄膜结构控制及光催化活性

张剑平1; 孙召梅1; 施利毅1,3; 贾桂玲1; 谢晓峰2; 饶薇薇1; 朱永法4   

  1. 1. 上海大学理学院化学系， 上海 200444； 2. 上海大学环境与化学工程学院, 上海 200072; 3. 上海大学纳米科学与技术研究中心, 上海 200444; 4. 清华大学化学系, 北京 100084
  • 收稿日期:2004-07-13 修回日期:2004-09-08 出版日期:2005-09-20 网络出版日期:2005-09-20

Preparation of TiO2 Film on Stainless Steel Webnet and the Degradation of Formaldehyde

ZHANG Jian-Ping1; SUN Zhao-Mei1; SHI Li-Yi1,3; JIA Gui-Ling; XIE Xiao-Feng2; RAO Wei-Wei1; ZHU Yong-Fa4   

  1. 1. Department of Chemistry; School of Science; Shanghai University; Shanghai 200444; China; 2. School of Environment and Chemical Engineering; Shanghai 200072; 3. Research Center of Nanoscience and Nanotechnology, Shanghai University, Shanghai 200444, China; 4. Department of Chemistry; Tsinghua University; Beijing 100084; China
  • Received:2004-07-13 Revised:2004-09-08 Published:2005-09-20 Online:2005-09-20

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摘要： 采用溶胶-凝胶法在不锈钢丝网上负载TiO2薄膜,通过SEM、XRD和TG-DTA对其进行表征.研究了聚乙二醇(PEG)分子量及添加量、水加入量、涂膜次数和煅烧温度等工艺条件对样品光催化降解甲醛性能的影响.结果表明,通过工艺条件控制可得具有较高光催化活性的负载型TiO2光催化薄膜.在钛酸丁酯乙醇溶液中添加适量PEG600和水,经反应制备的TiO2溶胶,涂膜于不锈钢丝网表面,450℃煅烧后获得具有中孔结构的TiO2混晶薄膜,该薄膜对甲醛光催化降解率达90%以上.

关键词: 溶胶-凝胶法, TiO2薄膜, 甲醛, 光催化

Abstract: Photocatalytic titanium dioxide films coated on stainless steel webnet were prepared by a sol-gel route. SEM, XRD and TG-DTA were employed to characterize the samples. The effects of the films prepared with different proceedings on photoactivity were investigated by formaldehyde photodegradation, such as the molecular weight of PEG, the amount of PEG, moisture content, the thickness of the films and the annealing temperatures. The formaldehyde photodegradation ratio can reach above 90% by the TiO2-based films. XRD patterns and SEM observation indicate that the TiO2 films with mesoporous structure are composed of mixed rutile and anatase crystals.

Key words: sol-gel route, titanium dioxide films, formaldehyde, photocatalysis

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