▎ 摘　　要

NOVELTY - The method involves dissolving graphene oxide (GO) in a piperazine aqueous solution, and conducting ultrasonic treatment at room temperature to obtain a uniformly dispersed first solution. The first solution is added dropwise to an upper layer of a porous anodic aluminum oxide (AAO) film, and a first composite film with a GO film layer and a porous AAO film layer is obtained after the solvent is evaporated at room temperature. A trimesoyl chloride solution is added dropwise to an upper surface of the GO film layer of the first composite film, and drying is performed to obtain a two-dimensional/one-dimensional heterogeneous nanochannel membrane. USE - Method for preparing two-dimensional/one-dimensional (2D/1D) heterogeneous nanochannel membrane for use in ocean salinity energy conversion (all claimed). ADVANTAGE - The method produces a 2D/1D heterogenous nanochannel membrane having very high energy conversion capability. The 2D/1D heterogeneous nanochannel membrane prepared by the method has an asymmetric channel structure, the GO film layer is negatively charged, and the macroporous AAO layer is positively charged, thus forming an asymmetric charge distribution and further showing ion rectification characteristics. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a two-dimensional/one-dimensional heterogeneous nanochannel membrane. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagram of an ion transport thumbnail of a 2D/1D heterogeneous nanochannel membrane.