Ethanol Sensing Properties of Tungsten Oxide Nanocubes Prepared by a Urea-Assisted Hydrothermal Method
A facile hydrothermal process has been employed to synthesize WO3 nanocubes using urea as an assistant agent. The crystal structure and morphology of WO3 nanocubes have been characterized by X-ray diffraction (XRD), scanning electron microcopy (SEM) and transmission electron microcopy (TEM). XRD, SEM and TEM images of the products illustrate that WO3 square nanostructures have a single orthorhombic phase, length of ~ 100-200 nm and thickness of ~ 40 nm. The ethanol sensing property of as-prepared tungsten oxide nanocubes is studied at ethanol concentration of 10-1000 ppm and working temperature of 160-400 °C. The result shows that the WO3 nanocubes have high sensitivity to ethanol because of their small size and special morphology.
W. Wei et al., "Ethanol Sensing Properties of Tungsten Oxide Nanocubes Prepared by a Urea-Assisted Hydrothermal Method", Advanced Materials Research, Vols. 311-313, pp. 351-355, 2011