▎ 摘　　要

NOVELTY - Preparing three-dimensional hierarchical porous graphene involves electrolyzing in water or aqueous solution using metal as an anode, carrying out solid-liquid separation to obtain metal oxide nanoparticles, where the standard redox potential of the metal is less than 0 V, modifying the organic ligands on the surface of the metal oxide nanoparticles to obtain an assembly body, carbonizing the assembly, removing the metal dioxide nanoparticles by acid etching and graphitizing in an argon protection atmosphere. The metal includes any iron, cobalt, nickel, tin, molybdenum, aluminum, magnesium, tungsten, and/or manganese. The organic ligand includes oleic acid, oleylamine, stearic acid, and/or stearylamine, preferably oleic acid and/or oleylamine. The acid includes hydrochloric acid, sulfuric acid and/or nitric acid. USE - The three-dimensional hierarchical porous graphene is useful in hydrogen storage, wastewater treatment, preparation of wave absorbing materials, preparation of catalysts, and preparation of load-type medicine (claimed) and in the field of lithium ion battery and fuel cell. ADVANTAGE - The method has good commonality, high degree of graphitization, excellent conductivity, rich and various pore structure and are connected with each other. The method uses cheap and easily obtained metal as raw material, through anode oxidation with low voltage and low energy consumption to prepare dispersed metal oxide nano-particles at room temperature, and then using oleic acid and oil amine or other organic ligand to modify the surface of the ligand so as to obtain the long-chain organic ligands-coated multi-dispersed metal oxide nano particles, and taking as the hard template to prepare three-dimensional graded porous graphene material. Compared with the traditional solvent thermal synthesis method, the operation is safety, green and the cost is greatly reduced. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a three-dimensional hierarchical porous graphene.