Abstract
In this paper, centrifugal spinning technology and calcination were used to prepare SnO2 ultra-fine fibers. Several parameters such as the concentration of SnCl4, rotational speed, and diameter of the spinneret were discussed to determine the optimum spinning conditions. The obtained as-spun fibers and SnO2 ultra-fine fibers were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), FT-IR spectra and X-ray photoelectron spectroscopy (XPS), and the low-temperature gas-sensing properties of the SnO2 sample were systematically investigated. The results proved that the SnO2 sample had good sensitivity for a variety of measured gases at low temperature. Among these, the SnO2 sensor showed the highest sensitivity for HCl gas, and the sensitivity for ethanol gas increased rapidly when its concentration exceeded 1200 ppm. Our results demonstrated that the centrifugal spinning could be a potential approach for preparing the SnO2 gas sensor.
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