MoO3 structures transition from nanoflowers to nanorods and their sensing performances

Morphology transformation and crystal growth strategies of metal oxide semiconductors are still extensively studied in material science recently, because the morphology crystallinity significantly affect physicochemical characteristics nanomaterials. However, understanding changes ?-MoO3 induced by annealing is a challenge. Herein, nanostructure transition temperature carefully investigated via XRD SEM methods. It can be found that crystallization highly dependent on temperature. Interestingly, MoO3 nanoflowers change into nanosheets at 500 °C. Afterward, turned microrods with increase due to continuous crystal. On other hand, sensing performances various nanostructures toward ethanol gas. Compared microrods, nanosheets-based sensor exhibits superior performance ethanol, maximum response value 8.06.