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Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (2): 179-184. Previous Articles     Next Articles

Reports

以两亲性共聚物为模板溶胶-凝胶法制备WO3多孔薄膜及其 氢致变色特性的研究

丁进月a,b 钟 良b 赵巧玲b 黄 晋b 张淑媛a 马 志*,b

  

  1. (a郑州大学化学系 郑州 450052)
    (b中国科学院上海有机化学研究所 上海 200032)

  • 投稿日期:2008-09-14 修回日期:2008-10-15 发布日期:2009-01-28
  • 通讯作者: 马志

Preparation of Porous WO3 Films by Sol-Gel Process Using Amphiphilic Copolymer as Template and Their Hydrogen Gasochromic Properties

Ding, Jinyue a,b Zhong, Liang b Zhao, Qiaoling b
Huang, Jin b Zhang, Shuyuan a Ma, Zhi *,b
  

  1. (a Department of Chemistry, Zhengzhou University, Zhengzhou 450052)
    (b Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032)
  • Received:2008-09-14 Revised:2008-10-15 Published:2009-01-28
  • Contact: Ma, Zhi

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Porous tungsten oxide films were prepared using a sol-gel process with the tungstic chloride as the source material using amphiphilic copolymers, poly(styrene-co-allyl alcohol) (PS-co-PAAL) and poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PEO-b-PPO-b-PEO), as template respectively. The effect of polymer template and annealed temperature on the porous structure of the WO3 films was investigated by thermogravimetric analyzer (TGA), X-ray powder diffractometer (XRD), scanning electron microscope (SEM) and atomic force microscope (AFM). The H2 gasochromic property and the change of visible transmittance before and after bleached were characterized by the test of H2 gas-sensing with combination of UV-visible spectrophotometer. The results indicated that the WO3 films prepared using PS-co-PAAL as template and annealed at 400 ℃ had crosslinked and porous structure, and showed the best H2 gasochromic property.

Key words: porous tungsten oxide film, sol-gel process, amphiphilic copolymer template, hydrogen gasochromic