▎ 摘　　要

NOVELTY - Preparing graphene oxide three-dimensional self-assembly plate comprises preparing graphene oxide using hummers method, centrifuging to remove impurities to obtain a filter cake, adding deionized water, mixing, stirring to obtain a graphene oxide solution, adding urea-formaldehyde resin, stirring, mixing to obtain a light brown graphene oxide composite slurry, coating on the substrate, drying to obtain a graphene oxide film, laminating 5-7 plates of graphene oxide film, spraying methanol solution on overlapping surface of graphene oxide films, moving the multi-layer laminated graphene oxide film into a sealing tank, pressurizing, allowing to stand to complete the urea-formaldehyde resin polymerization in the graphene oxide film to form a three-dimensional cross-linked network and introducing argon gas in the sealing tank, pressurizing to remove functional groups and maintaining argon gas state in sealing tank and finishing the graphitization process to obtain the graphene plate. USE - The method is useful for preparing graphene oxide three-dimensional self-assembly plate. ADVANTAGE - The method is simple and easy and has high practicability. DETAILED DESCRIPTION - Preparing graphene oxide three-dimensional self-assembly plate comprises (a) preparing graphene oxide, using hummers method (redox method), centrifuging to remove impurities by centrifugation to obtain a filter cake, (b) adding deionized water to filter cake obtained in step (a), mixing, stirring to obtain a graphene oxide solution to make the solid content of 1-5%, adjusting the PH value to 3.0-4.0, (c) adding urea-formaldehyde resin with a low degree of polymerization to the graphene oxide solution prepared in step (b), stirring, mixing thoroughly to obtain a light brown graphene oxide composite slurry, (d) coating the graphene oxide composite slurry prepared in step (c) on the substrate with a thickness of 2-3mm, (e) drying using blast drying oven at 50-70 degrees C to obtain a graphene oxide film with a thickness of 100-200um, (f) laminating 5-7 plate of graphene oxide film prepared in step (e), spraying methanol solution on the overlapping surface of each two graphene oxide films, where the methanol solution comprises melamine, aniline and/or acetamide, (g) moving the multi-layer laminated graphene oxide film prepared in the step (f) into a sealing tank under the vacuum degree of -60 to -100Kpa at 100-200 degrees C, pressurizing for 1- 5MPa, allowing to stand for 0.5-1 hour to complete the urea-formaldehyde resin polymerization in the graphene oxide film to form a three-dimensional cross-linked network and (g) introducing argon gas in the sealing tank, pressurizing for 5-10MPa to 800-1200 degrees C, allowing to stand for 1-2 hours to remove functional groups e.g. carboxy, hydroxy, epoxy and other impurities in graphene oxide and (i) maintaining the argon gas state in the sealing tank, reacting to 2000-2500 degrees C, allowing to stand for 2-3 hours and finishing the graphitization process to obtain the graphene plate.