title: 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 solvent-free method using SnCl2 x 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.
authors.affiliation: Institute of Nanochemistry and Nanobiology, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China.
authors.forename: Haijiao
authors.initials: H
authors.lastname: Zhang
authors.forename: Zhijin
authors.initials: Z
authors.lastname: Tan
authors.forename: Panpan
authors.initials: P
authors.lastname: Xu
authors.forename: Kokyo
authors.initials: K
authors.lastname: Oh
authors.forename: Ruofei
authors.initials: R
authors.lastname: Wu
authors.forename: Wenming
authors.initials: W
authors.lastname: Shi
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jiao
mesh_terms: D005740:Gases; D046529:Microscopy, Electron, Transmission; D053770:Nanowires; D012822:Silicon Dioxide / Q000737:chemistry*; D012997:Solvents; D017971:Tin Compounds / Q000737:chemistry*
chemical_list: D005740:Gases; D012997:Solvents; D017971:Tin Compounds; D012822:Silicon Dioxide; C045358:stannic oxide