Rational design of Bi-doped rGO/Co3O4 nanohybrids for ethanol sensing

Gas sensors based on metal oxide semiconductors (MOSCs) and reduced graphene (rGO) for sensing of organic volatile compounds often suffer from high operation temperature, low responses, poor selectivity, or narrow detection range. Herein, we design fabricate Bi-doped rGO/Co3O4 (BGCO) nanohybrids with a flower morphology, which have been applied as layer an ethanol sensor. This BGCO sensor exhibits maximum p-type response 178.1 towards 500 ppm at optimum working temperature 120 °C. The sensor’s range the concentration is ppb to ppm, has excellent selectivity compared other types gases oxidizing gas such NO2. enhanced mechanism attributed increased conductivity Bi doped material. Additionally, incorporation dopant can promote redox reaction, act catalyst.