Hollow cauliflower-like WO3 nano structures: Hydrothermal synthesis and their CO sensing properties

摘要

Hollow cauliflower-like WO3 nanostructures have been successfully synthesized via a facile hydrothermal process. The 3D novel structure is assembled by lots of non-uniform hexagonal WO3 nanorods, which shows the porosity surface and the hollow interiors. According to the time-dependent morphology evolution process, a possible formation mechanism was proposed. Gas sensing investigations reveal that the sample sensor exhibits excellent CO sensing properties at 270 degrees C, which may substantially benefit from the (001) reactive surfaces of hexagonal phase and the hollow porous structure.