Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7144781 | Sensors and Actuators B: Chemical | 2016 | 21 Pages |
Abstract
Cheap ultrahigh sensitivity sensors find many applications, hence their development is highly desirable. Here, we report a novel amperometric gas sensor based on the system graphene-ionic liquid-graphite nanopowder that we constructed. Prepared device exhibits response of 90% towards 2 ppm of NO2 in synthetic air and 40% of relative humidity. Short response time of 40 s and recovery time of less than one minute was observed. The variation of the saturation current with the concentration of the analysed gas shows a linear dependence in the range 1-5 ppm with a slope for the calibration curve of 0.2 μA/ppm. Our results thus show that graphite nanopowder can be efficiently used in sensing applications.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Václav Blechta, Martin Mergl, Karolina Drogowska, Václav ValeÅ¡, Martin KalbáÄ,