Low-Working-Temperature and High-NO₂-Sensing Properties of SnO₂/PANI Hybrid Material Sensors

Abstract:

In this work, SnO₂ porous nanosolids were obtained from SnO₂ nanopowders by using a solvo-thermal hot-press method. Then, by using the conventional thick-film sensors preparation technology, SnO₂ porous thick-film gas sensor was prepared from it. Meanwhile, polyaniline (PANI) was synthesized by chemical oxidation polymerization. After that, by mechanical method, the SnO₂/PANI composite gas sensors were fabricated. The intrinsic resistances and gas sensing properties of sensors to NO₂, NH₃, H₂ and ethanol vapor were tested. Compared with the SnO₂ porous gas sensors, the optimum operation temperature of SnO₂/PANI hybrid gas sensors decreased dramatically. And SnO₂/PANI hybrid gas sensors showed satisfying selectivity and high sensitivity for NO₂.

• Periodical: Key Engineering Materials (Volume 727)
• Pages: 503-507
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.727.503
• Online since: January 2017
• Authors: Hong Yan Xu, Teng Teng Wu, Wen Ru Li, Huan Qin Yu, Ting Zhai, Jie Qiang Wang, Bing Qiang Cao*
• Keywords: Composites, Gas Sensor, No₂, Polyaniline, SnO₂ Porous Nanosolid

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