Hydrothermal synthesis of WO3·1/3H2O nanorods and study of their electrical properties

Crystalline tungsten oxide hydrate (WO3·1/3H2O) nanorods have been prepared by a hydrothermal process using Na2WO4·2H2O and 4-phenylbutylamine as a structure-directing agent. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and thermal analysis techniques have been used to characterize the structure, morphology and composition of the nanorods. The WO3·1/3H2O nanorods are up to several hundred nanometers in length, and the widths and thicknesses are 40 and 8 nm, respectively. A study of the electric properties in the temperature range 170–730 °C and frequency range 5–13 MHz is reported. The obtained results show that the activation energies are about 0.07, 0.63 and 2.46 eV for o-WO3·1/3H2O, h-WO3 and m-WO3, respectively. The as-synthesized materials are promising for chemical and energy-related applications such as catalysts and electrochemical devices, and may be applied in rechargeable lithium-ion batteries.

Crystalline tungsten oxide hydrate (WO3·1/3H2O) nanorods have been prepared by a hydrothermal process using Na2WO4·2H2O and 4-phenylbutylamine as a structure-directing agent. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy and thermal analysis techniques have been used to characterize the structure, morphology and composition of the nanorods. The WO3·1/3H2O nanorods are up to several hundred nanometers in length, and the widths and thicknesses are 40 and 8 nm, respectively. A study of the electric properties in the temperature range 170–730 °C and frequency range 5–13 MHz is reported. The obtained results show that the activation energies are about 0.07, 0.63 and 2.46 eV for o-WO3·1/3H2O, h-WO3 and m-WO3, respectively. The as-synthesized materials are promising for chemical and energy-related applications such as catalysts and electrochemical devices, and may be applied in rechargeable lithium-ion batteries.Figure optionsDownload as PowerPoint slide