WO3, an n-type semiconductor, is an excellent gas-sensing material and has good sensitivity to toxic gases such as NO2. According to the experts, in recent years, with the rapid development of economy and industry, toxic gases such as NO2 have caused serious environmental pollution problems, such as acid rain, photochemical smog, etc. Due to their toxicity and destructiveness, the detection of NO2 and other toxic gases has paid much attention.

WO3 nanopowder is n-type semiconductor that has wide applications in smart windows, gas sensors, etc., so it has been paid much attention including its preparation. Here is a preparation method of WO3 nanopowder.

WO3 nanoparticles are often made into gas sensor for detecting various toxic gases. For example, WO3 nano particles have high sensitivity and selectivity to trimethylamine and high sensitivity to acetic acid, acetaldehyde, acetone, and ethanol gas.

WO3 nanopowder is a typical n-type gas-sensing material that has high sensitivity and selectivity to toxic gases, so it has a wide application in gas sensor to detect various hazardous gases. Especially for trimethylamine gas, the reaction is rapid, and the sensitivity is very high. It means that the WO3-based gas sensor provides a quick, convenient, and accurate detection method for detecting whether fish or shellfish food has deteriorated. Also, the gas sensor based on WO3 nano particles has the advantages of low power consumption, low cost and convenient operation. So, WO3 has attracted much attention.