▎ 摘　　要

In this work, we studied the high electrochemical activity induced by the O-doped layer on the graphene intercalated carbon (GIC) film under low energy electron irradiation. The GIC film was prepared by using the electron cyclotron resonance (ECR) plasma sputtering system and the top layer was deposited with 5 % oxygen doped under electron irradiation with different energy. Based on the nanostructure characterization, the electron irradiation played the key role to activate the bonding with oxygen and carbon atoms. In our experiments, doping 5 % oxygen under electron irradiation with energy of 50 V promoted more graphene edges and functional groups formed. The GIC film with O-doped top layer under electron irradiation of 50 V exhibits high electrochemical activity in Fe(CN)64-/3- and Fe3+/2+ redox systems, and realized the simultaneous detecting of sunset yellow (SY) and tartrazine (TT). The mechanism could be that the graphene edge and functional group formed by the activated oxygen atoms provide more active sites to accelerate the electron transfer.