▎ 摘　　要

NOVELTY - The utility model claims a graphite alkenyl sensor for GIS feature gas detection, comprising an electrode, a graphene layer, the insulating layer and the substrate, the graphene layer covers the printed electrode of the surface of the insulating layer, the insulating layer is covered on the surface of the substrate. the graphene layer by graphene oxide chemical vapor deposition, and using sodium hydroxide and chloroacetic acid solution to the graphene surface of hydroxyl and epoxy group into carboxyl, moving the single-layer graphene and covered on the surface of the insulating layer as the supporting layer wet with polymethyl methacrylate. carboxyl functional group capable of effective gas adsorption characteristic. modification of carboxyl functional group greatly improves the ability of the adsorption gas GIS features, further improves the sensitivity of the sensor. after the gas molecule is adsorbed, the electrical parameter of the graphene variations, according to the micro-current data representing change judging gas species to be tested, greatly improving the accuracy of the judgment.