Vol. 222, Issue 6, June 2018, pp. 6-11

Abstract: The detection of gaseous pollutants such as Benzene, Toluene, Ethylbenzene and Xylene (BTEX) under real conditions requires working in a humid environment. It is well known that the humidity reduces the performances of gas sensors, particularly in terms of sensitivity. Ionic liquids (ILs) are a new class of solvent with attractive properties for the extraction of volatile organic compounds (VOCs) or gases. Moreover, the ILs are particularly interesting because of their recycling ability and without atmospheric pollution. Low concentrations of BTEX are detected with a tungsten trioxide (WO3) thin film (50 nm) deposited by reactive RF magnetron sputtering on a transducer developed in our laboratory. Using a filter based on a mixed ionic liquid ([Bmim][Br]-[Bmim][PF6]), we are able to detect 500 ppb of BTEX gases without a sensor sensitivity decrease with 50 % relative humidity.

Keywords: Gas sensor, Humidity removal, Tungsten trioxide, Ionic liquids based filters.

Click <here> or title of paper to download the full pages article in pdf format

This work is licensed under a Creative Commons 4.0 International License

Read more about Gas Sensors

1999 - 2018 Copyright ©, International Frequency Sensor Association (IFSA) Publishing, S.L. All Rights Reserved.

Home - News - Links - Archives - Tools - Voltage-to-Frequency Converters - Standardization - Patents - Marketplace - Projects - Wish List - e-Shop - Sensor Jobs - Membership - Videos - Publishing - Site Map - Subscribe - Search

 Members Area -Sensors Portal -Training Courses - S&T Digest - For advertisers - Bookstore - Forums - Polls - Submit Press Release - Submit White Paper - Testimonies - Twitter - Facebook - LinkedIn