Abstract
The reduced graphene oxide@ SnO2 (GS)–polyaniline (PANI) composite was synthesized through the in situ chemical oxide polymerization for ammonia (NH3) gas detection at room temperature. The structure and morphology of resultant GS–PANI composite were characterized by ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy and field emission scanning electron microscopy, respectively. The NH3 sensing performance of the composite was investigated and compared with that of the sensors based on bare PANI and GS. The results revealed that the GS–PANI composite film exhibited 160 % response (1.4 and 16 times response enhanced) to 20 ppm NH3 than that of bare PANI and GS based devices. Meanwhile, the GS–PANI based sensors displayed linearity in response and homogeneous repeatability on exposure to NH3 at room temperature.
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Acknowledgments
This work was supported by the Natural Science Foundation of China (Grant Nos. 61176066, 61101031) and Program for New Century Excellent Talents in University (Grant No. NCET-13-0096).
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Ye, Z., Jiang, Y., Tai, H. et al. The investigation of reduced graphene oxide@ SnO2–polyaniline composite thin films for ammonia detection at room temperature. J Mater Sci: Mater Electron 26, 833–841 (2015). https://doi.org/10.1007/s10854-014-2472-3
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DOI: https://doi.org/10.1007/s10854-014-2472-3