Application of Tin Sulfide-Tin Dioxide Nanocomposite as Oxygen Gas-Sensing Agent

Abstract

Tin sulfide-tin dioxide nanocomposite is synthesized by the pulsed-current electrochemical method on the surface of tin substrate. The prepared sample in conditions includes 92 mA.cm-2 current density, 13 Hz pulse frequency, 0.008 M sodium sulfide, pH 12.5, and 25 °C electrocrystallization temperature is characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. Characterization studies showed that the sample contains uniform SnS-SnO2 nanocomposite in orthothombic nanorod form with 30 nm average diameters and 200 nm average lengths is synthesized. The synthesized is used as an oxygen gas-sensing agent to construct a new solid-state sensor. This sensor showed high dynamic range, high sensitivity to oxygen gas, fast response time and very low memory effect without any interference of the other gases.