Pure and NiO–SnO 2 nanofibers are synthesized via a simple electrospinning method, and characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, and X‐ray photoelectron spectroscopy. The sensor fabricated from 5 mol% NiO–SnO 2 nanofibers exhibits improved and excellent sensing properties to ethanol at 300°C. The response is up to 25.5 when the sensor is exposed to 100 ppm ethanol. The response and recovery times are about 2 and 3 s, respectively. The linear dependence of the sensitivity on the ethanol concentration is observed in the range of 5–500 ppm. Good selectivity is also observed in our studies. These results make NiO–SnO 2 nanofibers good candidates for fabricating practical ethanol sensors.
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Liu et al. (2010) studied this question.
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