Solvent effect on the NO₂ sensing properties of multi-walled carbon nanotubes

This article is devoted to the investigation of influence solvent on sensing properties, such as response and recovery rate, chemiresistive gas sensors. Multi-walled carbon nanotubes were used an active material for The initial was investigated by scanning electron spectroscopy transmission microscopy, low-temperature nitrogen adsorption, Raman spectroscopy, X-ray diffraction. produced drop casting. Different polar solvents (acetone ethanol) suspension preparation. Textolite with copper contacts edges one side a sensor substrate. properties (the time) in range 100–500 ppm NO2 at room temperature. films made using different suspensions showed high sensitivity rapid rate dioxide. It found that method film preparation has effect measured properties. prepared possessed properties: from acetone had values 8.49% 20.26%, 0.06%/min 0.16%/min. ethanol increased , being 12.25% 23.63%; also (from 0.19%/min 0.39%/min).