▎ 摘　　要

NOVELTY - Preparing three-dimensional multifunctional graphene film comprises (i) mixing metal powder, trimesic acid, hydrofluoric acid, nitric acid and deionized water, placing in a constant temperature magnetic stirrer, and stirring sufficiently to dissolve to obtain a precursor solution, (ii) transferring the precursor solution to the lining of the polytetrafluoroethylene reactor, sealing the reactor and heating, naturally cooling, centrifuging to collect the internal precipitate and washing with deionized water, (iii) purifying the unpurified MOF material in hot water, placing in hot ethanol, and transferring the material to a vacuum drying oven, (iv) taking the MOF powder, fixing and compacting on the metal copper sheet mold with two pieces of glass to form the MOF layer, setting the parameters of the nanosecond pulse laser, scanning the MOF layer, after the laser scribing of the entire MOF layer is completed, transforming MOF layer into three-dimensional multifunctional USE - The three-dimensional multifunctional graphene film is useful in wastewater purification and sustainable clean energy production. ADVANTAGE - The material does not agglomerate, and the distribution density of the metal on the carrier is higher, green precision fabrication technique using laser scribing technology provides a feasible technique for fabricating efficient and robust 3D graphene-based catalytic membrane. DETAILED DESCRIPTION - Preparing three-dimensional multifunctional graphene film comprises (i) mixing metal powder, trimesic acid, hydrofluoric acid, nitric acid and deionized water, placing in a constant temperature magnetic stirrer, and stirring sufficiently to dissolve to obtain a precursor solution, (ii) transferring the precursor solution to the lining of the polytetrafluoroethylene reactor, sealing the reactor and heating at 100-200℃ for 6-24 hours, naturally cooling to room temperature for 10 minutes, centrifuging to collect the internal precipitate and washing with deionized water to obtain the unpurified metal-organic framework (MOF) material, (iii) purifying the unpurified MOF material in hot water at 50-100℃ for 1-6 hours, placing in hot ethanol at 50-100℃ for 1-6 hours, and transferring the material to a vacuum drying oven, vacuum drying at 60-100℃ for 6-18 hours to obtain MOF powder, (iv) taking the MOF powder, fixing and compacting on the metal copper sheet mold with two pieces of glass to form the MOF layer, setting the parameters of the nanosecond pulse laser, and scanning the MOF layer, after the laser scribing of the entire MOF layer is completed, transforming MOF layer into three-dimensional multifunctional graphene film. An INDEPENDENT CLAIM is also included for a three-dimensional multifunctional graphene film, prepared by the above method.