Hydrothermal synthesis of sodium tungstate nanorods and nanobundles in the presence of sodium sulfate

Sodium tungstate nanorods and nanobundles have been successfully prepared, for the first time, through a simple salt-assisted hydrothermal route based on the reaction between Na2WO4 and HCl in aqueous solution. The resultant sodium tungstate nanorods and nanobundles were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and selected area electronic diffraction (SAED) techniques. The ingredients of the sample have been detected by energy-dispersive spectrum (EDS) method. It is found that hydrothermal temperature and time play important roles in the control of the morphology and size of the products.