Journal
SYNTHETIC METALS
Volume 200, Issue -, Pages 74-79Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2014.12.033
Keywords
SF6 decomposition products; Gas sensor; Polyaniline; Gas-sensing properties
Funding
- National Natural Science Foundation of P.R.China [51277188]
- New Century Excellent Talents in University Program [NCET-12-0590]
- Funds for Innovative Research Groups of China [51321063]
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Gas sensors for detecting SF6 decomposition products under partial discharge have been considered as an effective and low-cost apparatus for electrical insulation diagnosis of gas-insulated switchgear. A new gas sensor was developed using polyaniline (PANI) conducting polymers. HCl-doped PANI was successfully synthesized via in situ chemical oxidation polymerization. The formation, structure, and morphology of PANI were analyzed with Fourier-transform infrared spectroscopy, X-ray diffraction, and field emission scanning electron microscopy, respectively. PANI thin films were deposited onto the substrates by drop coating. Their gas-sensing properties to H2S, SO2, SOF2, and SO2F2 were measured. The PANI sensors showed excellent sensitivity of -58% to a low concentration (10 ppm) of H2S. The plausible response and recovery mechanism of PANI thin-film sensors were also discussed. (C) 2014 Elsevier B.V. All rights reserved.
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