▎ 摘　　要

NOVELTY - A graphene oxide separation membrane preparation method involves adding graphene oxide dispersion liquid into cross-flow device in a container, so that the graphene oxide dispersion liquid is parallel to the base membrane surface flow, followed by forming graphene oxide separation membrane on the surface of the base membrane under the driving pressure difference. USE - Method for preparing graphene oxide separation membrane that is utilized in the separation of single-component dye or a multi-component dye such as s-a-evans blue, rhodamine b, rose bengal and/or rose red (all claimed). ADVANTAGE - The method enables preparing the graphene oxide separation membrane with high stability, controllable thickness, and better separation selectivity to realize the efficient separation of the mixed dye, in simple and cost effective manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene oxide separation membrane prepared by the method.