Explore Tungsten Trioxide Photocatalytic Property

Photocatalyst is a general term of nanoscale titanium dioxide that has a photocatalytic function on behalf of the optical semiconductor material, which is applied to the substrate surface. Under the action of ultraviolet light, it can effectively degrade the air poisonous gases; can effectively kill a variety of bacteria. Fungi and bacteria can release toxins decomposition and it is a harmless treatment; it also has a deodorizing, antifouling, air purification and other functions. Photocatalyst materials are nano TiO₂, ZnO, CdS, WO₃, Fe₂O₃, PbS, SnO₂, ZnS, SrTiO₃, SiO₂, etc. In all of the photocatalyst material, in addition, the enzyme aldehyde not only has high photocatalytic activity, and has acid corrosion, chemical resistant, non-toxic, etc. Photocatalyst has a high price, and therefore most of the use of Nano-titanium dioxide as the main raw material on the market.

As can be seen from the figure, the atomic weight of tungsten (W) is 74, and titanium element atomic weight is 22, the structure of atomic is more complicated. Tungsten is rare heavy metals. It was found that tungsten trioxide (WO₃) and titanium dioxide (TiO₂) are similar. However, they are not the same nature. Energy tungsten trioxide (_WO3) outer electrons is less active compared to the titanium dioxide, its electron volts insufficient 3.2, that is to say, just 400 nm wavelength of visible light is activated.

Studies have shown that, photocatalyst tungsten trioxide is indeed light catalysis in the indoor environment, which can purify the indoor environment, for example, in fluorescent lamps (also called fluorescent) light irradiation (wavelength 400 nm) occurred photocatalysis. However, the activity is not enough. The cost of tungsten trioxide nanoscale production is too high; the production process is complex, the process requires a large number of civilian photocatalyst tungsten trioxide.