V-doped-violet-tungsten-oxide

V doped violet tungsten oxide is doping vanadium (V) into VTO (W₁₈O₄₉) nanowire lattice structure to generate doped W₁₈O₄₉ nanowire. A study directly synthesized V doped violet tungsten oxide by solvothermal method, the preparation steps are as following:
1. Take WCl₆ as W source, and propanol as a synthesis solvent to form a WCl₆ propanol solution;
2. Dissolve the appropriate amount of NH₄VO₃ in the WCl₆ propanol solution (the atomic ratio of V/W is about 2at%) with stirring, to form the precursor solution containing vanadium;
3. Transfer the precursor solution to hydrothermal synthesis reaction kettle to carry out solvothermal reaction at 200°C for 9 hours, then dry the wet product to obtain V doped violet tungsten oxide nanowire.

The doping of vanadium has not only changed the growth kinetics of a wiener rice noodle, but also induced the appearing of new surface state on the nanowires’ surface. At the same time, the doping of WO_2.72 nanowires with the high density non steady state surface promote the surface oxygen adsorption, thus to significantly improve the room temperature sensitive properties of W₁₈O₄₉ nanowires. Studies have shown that W₁₈O₄₉ nanowires with the stoichiometric ratio is a kind of high performance NO₂ sensitive material at room temperature, and has good development and potential applications in the detection of thin NO₂ under the room temperature.