ملخص
Abstract: In this paper, a thin film was prepared from tin dioxide, SnO2, by heat treatment of tin sulfide films prepared by SILAR method. The prepared samples in form of tin sulfide films, were examined using diffracted. The results are consistent with previous literature. The membrane was also examined using a scanning electron microscope SEM, and it was found that the membrane is composed of spherical nanoparticles, and the membrane was examined with EXD, and the results proved the presence of sulfur and tin in a ratio of (Sn/S =3/2). To convert the membrane to tin oxide, the membrane is plasticized with a temperature of 400oC, as a result the color changed from dark nutty color to golden color, and X-ray examination showed that the membrane changed to tin oxide. The optical properties were studied, and an energy gap was calculated for tin sulfide and tin oxide, which were 1.9 eV and 3.2 eV, respectively. A gas sensor was manufactured and the sensitivity of the device to LPG was measured using the measuring system and the sensitivity was (S=4.288%).