▎ 摘　　要

NOVELTY - A gas sensitive material comprises a noble metal, a metal oxide and a graphene ternary composite material. USE - Gas sensitive material for use in gas sensor (claimed) for detecting acetone gas. ADVANTAGE - The material provides the sensor with high sensitivity, rapid response speed, reduced recovery time and wide application prospect. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following: (1) a method for preparing a gas sensitive material, which involves mixing oxidation graphite alkene solution, base metal salt solution and noble metal salt solution to obtain a noble metal/base metal oxide/graphite alkene precursor mixture, and heat-treating the mixture (2) a gas sensor having a two comb shape sensing electrodes fixed with a lower part of a substrate and a gold wire, where the comb teeth are coated with a gas sensitive material, and two comb type sensing electrodes are mutually connected with a strip sensor electrode and a lower part of a base ,the strip sensor electrode is connected with the gold wire.