Subnanometer purple tungsten oxide is a transition metal compound material whose average particle size is smaller than that of nanometer purple tungsten oxide. Compared with other tungsten oxides, the crystal structure of sub-nanometer purple tungsten oxide is more special. There are not only abundant cracks inside the particles, but also the shape is basically needle-like or rod-like, which makes the material have a larger porosity, High chemical activity, low bulk density, etc., are more suitable as raw materials for the production of ultra-fine tungsten powder and ultra-fine tungsten carbide powder.
Subnanometer violet tungsten oxide is a material of very high purity. Under normal circumstances, its purity can reach 99.95% (3.5N) and 99.99% (4N); if the production conditions and raw materials are more reasonably controlled, the purity of purple tungsten oxide can even reach 99.9995% (5.5N). However, not all products are made of high-purity purple tungsten, and the quality will be better. Normally, the purity of purple tungsten oxide should be selected according to the actual production situation.
In some industries, in order to improve certain aspects of performance of purple tungsten oxide, manufacturers often add elements such as vanadium, molybdenum, and titanium to it. However, this also reduces the purity of violet tungsten to a certain extent.
Vanadium-doped violet tungsten oxide is to introduce vanadium (V) into the lattice structure of violet tungsten nanowires to prepare doped violet tungsten oxide nanowires. Here, vanadium doping not only changes the growth kinetics of 1D nanowires, but also induces the appearance of new surface states of the nanowires.
Molybdenum-doped purple tungsten oxide is to introduce molybdenum into the lattice structure of purple tungsten nanowires to prepare doped purple tungsten oxide nanowires. Because of its high hydrogen production activity, it can be used as a catalyst in the process of hydrogen production.
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