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NO2 Sensor with a Graphite Nanopowder Working Electrode
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SYSNO ASEP 0452649 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title NO2 Sensor with a Graphite Nanopowder Working Electrode Author(s) Blechta, Václav (UFCH-W) RID, ORCID
Mergl, Martin (UFCH-W)
Drogowska, Karolina (UFCH-W) RID
Valeš, Václav (UFCH-W) RID, ORCID
Kalbáč, Martin (UFCH-W) RID, ORCIDSource Title Sensors and Actuators B - Chemical. - : Elsevier
Roč. 226, APR 2016 (2016), s. 299-304Number of pages 20 s. Language eng - English Country CH - Switzerland Keywords graphene ; graphite nanopowder ; ionic liquid Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GBP208/12/G016 GA ČR - Czech Science Foundation (CSF) Institutional support UFCH-W - RVO:61388955 UT WOS 000368810300039 EID SCOPUS 84951184396 DOI 10.1016/j.snb.2015.11.130 Annotation 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2017
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