Article ID Journal Published Year Pages File Type
7144781 Sensors and Actuators B: Chemical 2016 21 Pages PDF
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.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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