Tin dioxide (SnO2) thin films were prepared using the thermal spray pyrolysis method from SnCl2.2H2O isopropyl mixing with water solution on the glass substrate heated at 450?¢????¦C. The films were characterized by X-ray diffraction (XRD), The crystallite size was evaluated to be 4.413 nm by using the Scherrer’s equation. Atomic Force Microscope (AFM) and optical absorption spectra were taken to examine the surface morphology and optical properties to determine the band gap energy 3.9 eV, increase in band gap energy is revealed that nanostructure SnO2 films. These films were tested in butane gas at operating temperature 470 ?¢????¦C. The response and recovery time is 13 sec, 63 sec respectively.
