Lightweight, Room-Temperature CO2 Gas Sensor Based on Rare-Earth Metal-Free Composites- An Impedance Study

We report a light, flexible, and low-power poly(ionic liquid)/alumina composite CO2 sensor. We monitor the direct-current resistance changes as a function of CO2 concentration and relative humidity and demonstrate fast and reversible sensing kinetics. Moreover, on the basis of the alternating-current impedance measurements we propose a sensing mechanism related to proton conduction and gas diffusion. The findings presented herein will promote the development of organic/ inorganic composite CO2 gas sensors. In the future, such sensors will be useful for numerous practical applications ranging from indoor air quality control to the monitoring of manufacturing processes.


Published in:
Acs Applied Materials & Interfaces, 9, 30, 25553-25558
Year:
2017
Publisher:
Washington, Amer Chemical Soc
ISSN:
1944-8244
Keywords:
Laboratories:




 Record created 2017-09-05, last modified 2020-08-28


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