期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 46, 期 8, 页码 5240-5247出版社
SPRINGER
DOI: 10.1007/s11664-017-5535-4
关键词
Polyaniline; cadmium ferrite; liquefied petroleum gas; sensing response; stability
资金
- University Grants Commission, New Delhi [1-917/2012 (SR)]
We introduce polyaniline-cadmium ferrite (PANI-CdFe2O4) nanostructured composite as a room-temperature-operable liquefied petroleum gas (LPG) sensor. The structure of PANI and the composite prepared by chemical polymerization was characterized by Fourier-transform infrared (FT-IR) spectroscopy, x-ray diffraction (XRD) analysis, and field-emission scanning electron microscopy. Comparative XRD and FT-IR analysis confirmed CdFe2O4 embedded in PANI matrix with mutual interfacial interaction. The nanostructure of the composite was confirmed by transmission electron microscopy. A simple LPG sensor operable at room temperature, exclusively based on spin-coated PANI-CdFe2O4 nanocomposite, was fabricated with maximum sensing response of 50.83% at 1000 ppm LPG. The response and recovery time of the sensor were 50 s and 110 s, respectively, and it was stable over a period of 1 month with slight degradation of 4%. The sensing mechanism is discussed on the basis of the p-n heterojunction barrier formed at the interface of PANI and CdFe2O4.
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