In-Situ Electrochemical Synthesis of Novel Sensitive Layer of Polyaniline/Multiwall Carbon Nanotube/Tin Oxide Hybrid Materials for Ethylene Gas Detection

摘要

The development of a suitable sensing material for a high-sensitivity detection method for ethylene is needed to enhance the efficiency of estimating the life expectancy of agricultural products. A novel sensor for ethylene gas comprised of a polyaniline/multiwall carbon nanotube/tin oxide nanoparticle (PANi/MWCNT/SnO2NP) was successfully synthesized by electrophoretic deposition of SnO2NPs onto a gold interdigited substrate and then chronoam-perometric deposition of the PANi/MWCNT film from an aniline/ MWCNT solution. The sensitivity of the PANi/M WCNT/SnO2NP composite sensor was found to be almost linearly dependent on the concentration of ethylene gas in the parts per million range, with an ethylene-sensithity of 10ppm and a gas-sensitivity of 2.42.