Nanocomposite of Tin Oxide and Tungsten Oxide for Ethanol Sensing Applications

Abstract

Tungsten oxide (WO3) and tin oxide (SnO2) nanostructures are hydrothermally synthesized in this research. Fabrication process is simple and inexpensive. The nanomaterials are analyzed and proved that they are with high purity and high crystallinity through different techniques. By combining these two nanomaterials, the SnO2/WO3 nanocomposite is made into an ethanol gas sensor. Not only large surface area but also a heterojunction between SnO2 and WO3 enhance the sensing ability of the sensor. It has high sensing response ratio of 262.61% to 100 ppm ethanol gas at 120 °C. Fast response and recovery times are also worth noting. The fabricated gas sensor can help detecting ethanol concentration in different fields.