Nanohybrid TiO2/carbon black sensor for NO2 gas

Abstract

A nanohybrid sensor of nanosized TiO₂-coated carbon black particles, prepared by sol–gel technology for the detection of NO₂ gas, has been developed. The response of the electric resistance of the hybrid sensor to NO₂ concentration is investigated, showing that the sensitivity of the hybrid sensor is raised as certain ratio of the TiO₂ content in the sensor. Easy and cheap to fabricate, the hybrid TiO₂/carbon black promises to be a practical sensor for detecting NO₂ gas.