As a gas sensing material, WO3 on the nanoscale has good gas sensitivity and selectivity towards H2, CO, H2S, NH3, NOx, O3 as well as some organic gases. WO3 nano powder is a typical n-type semiconductor that is considered to be the promising material to fabricate the gas sensor, which has a widespread utilization in the environment detecting and the safety monitoring. When WO3 nanopowder contacts the gas to be measured, its resistance changes, so that the output signal changes accordingly to achieve the purpose of gas detection.
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Well, do you know what a gas sensing material is? The so-called gas sensing material refer to a type of material that can senses a certain gas and its concentration in the environment. Its working principle is to convert signals such as gas type and concentration into electrical signals, so as to achieve the purpose of gas sensing.
