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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

聚吡咯/二氧化钛复合薄膜的制备及气敏性研究

太惠玲, 蒋亚东, 谢光忠, 赵明静   

  1. 电子科技大学光电信息学院, 成都 610054

  • 收稿日期:2006-06-12 修回日期:2006-07-24 出版日期:2007-05-20 网络出版日期:2007-05-20

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

TAI Hui-Ling, JIANG Ya-Dong, XIE Guang-Zhong, ZHAO Ming-Jing   

  1. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China
  • Received:2006-06-12 Revised:2006-07-24 Published:2007-05-20 Online:2007-05-20

PDF (PC)

2089

被引次数

38

摘要：

运用静电力自组装和原位化学氧化聚合相结合的方法制备了聚吡咯/纳米二氧化钛(PPy/TiO2)复合薄膜, 并进行了紫外－可见光谱分析和原子力显微镜分析. 采用平面叉指电极制备了PPy/TiO2复合薄膜气体传感器, 研究了其在常温下对有毒气体NH3和CO的敏感性. 最后测试了该传感器的温度湿度特性. 结果表明, 该传感器对NH3具有较高的灵敏度, 对CO几乎没有响应. 同时讨论了复合薄膜沉积时间对气敏特性的影响, 实验表明当沉积时间为20min时, 该传感器的NH3敏感特性最好.

关键词: PPy/TiO2, 复合薄膜, 气体传感器, NH3

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

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