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WO3-Based Hydrogen Sulfide Gas Sensor

Hydrogen sulfide gas sensor is used to monitor the concentration of hydrogen sulfide in the air, gas sensor generally consists of two sheets: one sheet for heating, and the other sheet is the gas sensing film which is sensitive to hydrogen sulfide. WO3 based gas material is considered to be one of the most promising new oxide sensitive material to detect hydrogen sulfide. The first time to reported WO3 based gas material for the detection of hydrogen sulfide gas was in 1990, which is reported that WO3 has high sensitivity on 0.005% of hydrogen sulfide at the temperature of 469K; even though the response time is quite long (up to 90% of steady cemented carbide inserts resistance response time 7~8 minutes), this achievement still made a great contribution to promote the development of WO3-based hydrogen sulfide gas-sensitive materials. And thereafter, the preparation of WO3 based thin or thick film of hydrogen sulfide gas sensitive material has gradually become active again, and also the study on structure, electrical properties, sensing mechanism.
by adriantrum | 2023-03-22 15:16


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