The Preparation of Modified Graphene Oxide and Gas Sensitivity Study

Graphene-based composite materials may have higher gas sensitivity than graphene itself in gas sensing application. In this paper, the composite of reduced graphene oxide (rGO) and zinc oxide (ZnO) nanoparticles is prepared and used as a gas sensing material. The response of the sensor to ethanol vapor is studied at room temperature with different concentrations of the target gas and suspension concentrations of ZnO/rGO. The results show that ZnO/rGO composite is very sensitive to the ethanol vapor and the sensitivity can be increased greatly by heating the ZnO/rGO composite with microwave.