Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
749709 | Solid-State Electronics | 2006 | 4 Pages |
Abstract
In this work, a H2S sensor formed from hybrid of WO3 and polypyrrole (PPy) by mechanical mixing was produced. The gas-sensing properties of the hybrid materials were studied and compared with those of PPy and WO3. It was found that PPy/WO3 materials can complement the drawbacks of pure PPy and WO3 to some extent. PPy/WO3 materials with varies PPy mass percent (1%, 3%, 5%, 10%, 20%) had better reversibility than PPy, and also had higher sensitivity than WO3 when operated at 90 °C. The sensing mechanism of PPy/WO3 materials to H2S was presumed to be the synergism of PPy and WO3 or the effect of p–n heterojunctions.
Keywords
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Physical Sciences and Engineering
Engineering
Electrical and Electronic Engineering
Authors
Lina Geng, Xueliang Huang, Yingqiang Zhao, Peng Li, Shurong Wang, Shoumin Zhang, Shihua Wu,