Synthesis of ZnWO4 nano-particles by a molten salt method

ZnWO4 nano-particles were successfully synthesized by a molten salt method at 300 °C. The as-prepared powders were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and photoluminescent spectra techniques (PL), respectively. The size and morphology of ZnWO4 nano-particles were affected by such conditions as the calcining time and the weight ratio of the salt to the ZnWO4 precursor. The resultant sample is a pure phase of ZnWO4 without any impurities. The PL spectra results showed that the optical property of ZnWO4 crystallites obviously relied on their particle sizes.