▎ 摘　　要

NOVELTY - Synthesizing a water purification membrane, comprises: stacking many graphene oxide (GO) nanosheets to create the water purification membrane, where the stacking involves layer-by-layer assembly of the GO nanosheets; and forming many nanochannels between the GO nanosheets for allowing the flow of a fluid and for rejecting the flow of contaminants. USE - The method is useful for synthesizing a water purification membrane, which is used in point-of use water purification for military operation missions and for humanitarian relief to disaster-ridden and impoverished areas, on-site treatment of hydrofracking flowback water, renewable energy production, and drug delivery and artificial organ development. ADVANTAGE - The method: utilizes GO membrane which has high water permeability and improved selectivity for targeted contaminants; utilizes GO membrane, which uses graphite as an inexpensive raw material, significantly lowering the membrane fabrication cost and the synthesis procedure for both GO nanosheets and GO membrane is simple and scalable; provides water purification membrane with very high rejection of organic dye with molecular weight of around 500 Daltons, with water flux of 4-10 times higher than that of most currently commercially available nanofiltration membranes; facilitates synthesis of GO membrane exploiting the ideal properties of inexpensive GO materials offers a myriad of opportunities to modify its physicochemical properties, potentially making the GO membrane a next-generation, cost-effective, and sustainable alternative to the long-existing thin-film composite polyamide membranes for water separation applications. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for creating a water separation membrane, comprising depositing the graphene oxide (GO) nanosheets via a layer-by-layer assembly and bonding the GO nanosheets with each other and with a support substrate.