Graphene oxide(GO)has become a promising 2D material in many areas,such as gas separation,seawater desalination,antibacterial materials and so on due to its abundant oxygen-containing functional groups and excellent dispersibility in various solvents.The graphene oxide membrane(GOM),a laminar and channel-rich structure assembled by stacked GO nanosheets,served as a kind of precise and ultrafast separation material has attracted widespread attention in membrane separation field.In this work,we adopted the spin-coating method to obtain the GOM/PET system and this system exhibited both enhanced cation transport properties and higher rectification ratio than those of pure PET conical nanopore.