Abstract：Since its discovery, graphene has been used more and more extensively for its excellent two- dimensional planar structure and good conductivity, thermal conductivity, and honeycomb network structure, which provides a series of innovative ideas for various aspects of scientific research. Graphene has been its excellent two- dimensional planar structure and good electrical conductivity, thermal conductivity, and structural cellular network structure. The innovative ideas of graphene in the gas sensor, as well as the current development overview and future prospects, are summarized. The unique honeycomb network structure of graphene has the good adsorption capacity for gas, desorption ability under simple conditions and the good electrical conductivity causes the electron exchange resulting in the variation of graphene resistance when the gas to be tested contacts the surface of graphene. Thus, a graphene- based gas sensor can use the small change to measure the concentration of the tested gas. It is the graphene- based gas s sensor that can use this small change to measure the concentration of the gas under test. The current research shows that in order to improve the gas sensing properties of graphene, other metal ions or metal oxides with organic polymers are doped on the surface of graphene.
2018, Vol. 28 
