R.H. Bari, S.B. Patil, Studies on Spray Pyrolised Nanostructured SnO2 Thin Films for H2 Gas Sensing Application, Volume 36, International Letters of Chemistry, Physics and Astronomy (Volume 36)
https://www.scipress.com/ILCPA.36.125
Abstract:
    The objective of this work is to study the influence of pyrolysis temperature on structural, surface morphology and gas sensing properties of the nanostructured SnO<sub>2</sub> thin films prepared by spray pyrolysis technique. These films were characterized for the structural, morphological and elemental composition carried by means of X-ray diffraction (XRD), scanning electron mi­croscopy (SEM) and energy dispersive spectrophotometer (EDAX). The information of crystallite size, dislocation density and microstrain is obtained from the full width-at half- maximum (FWHM) of the diffraction peaks. Effect of sprayed deposition temperature on H<sub>2 </sub>gas sensing performance and electrical properties were studied using static gas sensing system. The sensor (T<sub>pyr</sub>. = 350<sup> </sup>°C) showed high gas response (S = 1200 at 350 °C) on exposure of 500 ppm of H<sub>2</sub> and high selectivity against other gases The results are discussed and interpreted.
Keywords:
    Electrical Conductivity, H<sub>2</sub> Gas Sensor, Microstrain, Nanostructured SnO<sub>2</sub>, Spray Pyrolysis, Thin Films