Room temperature gas sensing properties of SnO_2/multiwall-carbon-nanotube composite nanofibers

摘要

Pure SnO_2 and SnO_2 polycrystalline nanofibers doped with multiwall carbon nanotubes (MWCNTs) are synthesized by electrospinning followed by calcination in air at 500 ℃. The measurement results by sensors fabricated from these fiber mats at steady state show that the n-type SnO_2/MWCNT nanofibers are able to detect carbon monoxide at 50 ppm at room temperature, while the pure SnO_2 nanofibers are insensitive up to 500 ppm. The MWCNT doped SnO_2 nanofibers have demonstrated their potentials for wearable room temperature gas sensors with low cost and power consumption.