The growth direction- and shape-controllable preparation of WO3•H2O is an existing challenge. This paper reports a facile approach for preparing WO3•H2O nanoplates in a solvent mixture of glycerol and water. It was determined that oleic acid has a dual function; that is, it provides a source of acid and guides the structure during the WO3•H2O growth. The structure and morphology of the samples were examined by XRD, SEM and TEM. We systematically explained the process and mechanism of WO3•H2O formation. Furthermore, the gas-sensing performan...
