▎ 摘　　要

NOVELTY - Preparing graphene/zirconia composites, comprises placing zirconia particles in plasma reaction zone, introducing methane or other organic compounds into the reaction system, and under the aid of hydrogen plasma, graphene can be easily and quickly synthesized on zirconia particles. USE - The method is useful for preparing graphene/zirconia composites i.e. useful for gas sensing applications. ADVANTAGE - The method: can directly prepare graphene on zirconia particles; provides the graphene-coated zirconia composites with a larger specific surface area and a high surface carrier concentration, which makes it very sensitive to the surrounding environments; and provides a simple way to prepare carbon-coated zirconia composites, thus adsorption or release of one gas molecule can be detected efficiently.