▎ 摘　　要

NOVELTY - Graphene-based gas sensing probe comprises graphite alkenyl composite material, where graphite alkenyl composite material comprises graphene-based material structure and graphite alkene material support, graphite alkenyl material structure which are uniformly distributed on graphite alkenyl gas sensing probe surface and interior. The graphene-based material is with portion or all graphene microscopic atomic structure. The graphite alkene material supporter is formed by carbonizing polymer base material. USE - Graphene-based gas sensing probe. ADVANTAGE - The graphene-based gas sensing probe improve detection sensitivity, has simple process, and is convenient for use. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing graphene-based gas sensing probe, which involves adding graphite alkene material and polymer base material in organic solvent, mixing to form slurry and making into strip, block or film, where amount of graphite alkene material is 0.01-50 wt.%, and amount of polymer base material in organic solvent is 0.01-50 wt.%.; (2) a graphene-based gas sensor, which comprises graphene-based gas sensing probe; and (3) a method for detecting graphene-based gas sensing probe, which involves detecting target gas by detecting change in resistance of gas sensing probe on graphene-based material by adsorbing target gas.