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Journal of Inorganic Materials

Journal of Inorganic Materials >

2007 , Vol. 22 >Issue 3: 524 - 528

DOI: https://doi.org/10.3724/SP.J.1077.2007.00524

Research Paper

Fabrication and Gas Sensitivity Study of Polypyrrole/Titanium Oxide Composite Thin Films

  • TAI Hui-Ling ,
  • JIANG Ya-Dong ,
  • XIE Guang-Zhong ,
  • ZHAO Ming-Jing
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  • School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China

Received date: 2006-06-12

  Revised date: 2006-07-24

  Online published: 2007-05-20

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Abstract

Polypyrrole/Titanium Oxide (PPy/TiO 2) nanocomposite thin films prepared by in situ chemical oxidation polymerization and electrostatic self-assembly combined technique were investigated. The films were characterized with UV-Vis spectroscope and atomic force microscope. With the assistance of interdigitated electrodes, gas sensors using PPy/TiO 2 nanocomposite thin films were achieved. The sensitivities of sensors to toxic gases NH3 and CO at room temperature were studied. Temperature and humidity sensitive properties were also tested. The results show that the sensor can detect NH 3 with high sensitivity, whereas can not recognize CO almost. The investigation of the effects of film depositing time on sensor sensitivities shows that the sensors with the composite thin film deposited for 20min possess the highest sensitivity to NH3.

Key words： PPy/TiO2; nanocomposite thin films; gas sensor; NH3

Cite this article

TAI Hui-Ling , JIANG Ya-Dong , XIE Guang-Zhong , ZHAO Ming-Jing . Fabrication and Gas Sensitivity Study of Polypyrrole/Titanium Oxide Composite Thin Films[J]. Journal of Inorganic Materials, 2007 , 22(3) : 524 -528 . DOI: 10.3724/SP.J.1077.2007.00524

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