Synthesis and Characterization of Sodium Tungsten Oxide (NaxWO3, 0 <x< 1) Nanobundles

Abstract Sodium tungsten oxide nanobundles are synthesized by acid precipitation method with the ammonium tungstate and sodium hydroxide. The crystal structure, morphology and optical properties of the sodium tungsten oxide (NaxWO3, x = 0.33, 0.5, 0.75, and 1.0) nanobundles are analyzed by X-ray diffraction, field-emission scanning electron microscopy, and UV-visible spectroscopy, respectively. Keywords: Sodium tungsten oxideNa x WO3 nanobundlesprecipitation