One-step synthesis of polypyrrole/Fe 2 O 3 nanocomposite and the enhanced response of NO 2 at low temperature

In order to enhance the gas response of polypyrrole to NO , the polypyrrole/Fe O nanocomposites are synthesized by one-step hydrothermal route. The presence of ferric oxide in composites is demonstrated by XPS, HRTEM and TG analyses. The polypyrrole/Fe O sensor exhibits high selectivity and response...

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Bibliographic Details
Published in:Journal of colloid and interface science 2020-02, Vol.560, p.312
Main Authors: Wang, Chao, Yang, Ming, Liu, Lihong, Xu, Yingming, Zhang, Xianfa, Cheng, Xiaoli, Gao, Shan, Gao, Yuan, Huo, Lihua
Format: Article
Language:English
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Summary:In order to enhance the gas response of polypyrrole to NO , the polypyrrole/Fe O nanocomposites are synthesized by one-step hydrothermal route. The presence of ferric oxide in composites is demonstrated by XPS, HRTEM and TG analyses. The polypyrrole/Fe O sensor exhibits high selectivity and response to NO at 50 °C. Compared with other polypyrrole/metal oxide materials, the polypyrrole/Fe O materials are easy to be synthesized, and the gas sensor has a higher response of 220.7%, lower detection limit of 0.1 ppm and good linear relationship when the NO concentrations range from 0.1 ppm to 10 ppm. The gas response is greatly improved in comparison with the pure polypyrrole and Fe O . The reason for the improved response is also discussed.
ISSN:1095-7103
DOI:10.1016/j.jcis.2019.10.076