Preparation of SnO2 Nanowires by Solvent-Free Method Using Mesoporous Silica Template and Their Gas Sensitive Properties
Abstract:In this paper, a facile method was presented to synthesize tin dioxide (SnO2) nanowires by solventfree method using SnCl2·2H2O as precursor and mesoporous silica SBA-15 as the hard template. No solvent was used in the processing. The products were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS) and N2 adsorption/desorption isotherms. The results indicated that SnO2 nanowires fabricated by this method have a diameter of about 8 nm and a relatively high surface area 73.0 m2/g. The gas sensing properties of SnO2 nanowires were measured. The response and recovery time of this sensor were 6 s and 12 s, respectively. With the concentration of toluene increasing, the response of the sensor doubled increase. Compared with bulk SnO2, SnO2 nanowires showed much higher response to toluene.
Document Type: Research Article
Publication date: December 1, 2011
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