Tungsten trioxide nanotubes with high sensitive and selective properties to acetone

WO 3 nanotubes have been successfully synthesized by electrospinning and followed by calcination . The synthesized WO 3 nanotubes have been characterized by scanning electron microscope (SEM) and X-ray powder diffraction (XRD). Based on the experimental results, the average diameter of the WO 3 nanotubes is about 200   nm. Gas sensors based on WO 3 nanotubes were made in order to investigate their gas sensing properties. The gas sensing measurements were evaluated toward different concentration of some gases including acetone, ethanol, methanol, ammonia, hydrogen, carbon monoxide and butane at 250   °C. The results reveal that the WO 3 nanotubes are promising acetone sensing material owing to their high response and good selectivity.