Nano tungsten trioxide (WO3) has a large relative area and significant surface effect, and is a good catalyst, which can be used as a main catalyst or a co-catalyst, and has high selectivity to the reaction. Nano tungsten trioxide (WO3) has a strong absorption capacity for electromagnetic waves, and can be used as an excellent solar energy absorption material and recessive material. Nano-tungsten trioxide (WO3) is an n-type semiconductor material with excellent gas sensitivity, so it can be used to make gas sensors and gas-chromic devices.
1) In terms of environmental testing. It is used for flammable gas leakage alarm and humidity sensor. The measured gases mainly include CO, CH4, NOX, SO2, NH3, H2, etc.
2) Civilian use. It can detect the leakage of civil gas such as natural gas, petroleum liquefied petroleum gas and city gas, and can also detect some unpleasant gases in public places such as houses and buildings.
3) Industrial aspects. Used to detect highly toxic gases such as carbon dioxide, nitrogen oxides, and sulfur oxides in the petrochemical industry; detect hydrogen generated during the deterioration of power transformer oil; detect the freshness of perishable foods such as meat; detect ethanol gas in the driver’s breath concentration.
In recent years, through the joint efforts of many researchers, various degrees of progress have been made in improving the gas sensitivity, selectivity, lowering the working temperature, different doping and improving the process of WO3-based gas-sensing materials. The bandgap energy of tungsten trioxide is about 2.5eV, and it has potential photocatalytic ability in visible light with wavelength <500nm. Photocatalytic degradation of organic matter is a new technology that uses sunlight to degrade organic matter, saving energy and not polluting the environment. Therefore, nano-tungsten trioxide (WO3) has potential application prospects in the treatment of organic dye polluted water.
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