Tantalum tungsten bronze (TaxWO3) may be synthesized via hydrothermal method using TaCl5 and Na2WO4?2H2O as raw materials. The TaxWO3 synthesized at 170°C for 48h is hexagonal with the size of about 10~50nm. And TaxWO3 has a strong electrocatalytic activity for hydrogen evolution reaction.
The morphology, crystal structure and optical properties of synthesized products were characterized by means of XRD, TEM, SEM, UV-vis and Raman technologies. In addition, the electrocatalytic activity for hydrogen evolution reaction was also investigated by cyclic voltammetry.
The XRD results showed that TaxWO3 nanowire exhibited hexagonal structure. By increasing the doping content, the cell parameter was kept increasing gradually till Ta/W=0.04, then it remained almost constant.
The UV-vis diffraction spectrum analysis showed that the absorption peaks redshifted, the band gap energy decreased with increasing the doping content.
The Roman peaks moved with a downshift, and the peak gradually became broader, which further improved the influence of the tantalum doping for tungsten oxide. The reactions of decomposing liquid Rhodamine B solution showed that the nanosized has a high photo-catalytic activity.
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