▎ 摘　　要

NOVELTY - Economical preparation of three-dimensional porous graphene comprises e.g. (1) selecting residual coal source of coal gangue including anthracite, bituminous coal, sub-bituminous coal, and lignite, (2) mechanically pulverizing the selected coal gangue residual coal source, (3) separating organic components and mineral components from the pulverized residual coal source by flotation, (4) ball milling the separated organic component wet powder to 200-500 meshes sieve, (5) adding catalyst and nano-scale organic components to blend and grind to obtain a uniform mixture, where the mass ratio of catalyst to organic components is 0.1-1:1, (6) treating the above mixture at a high temperature of 2000-3000 degrees C for 1-24 hours, and filling in high-purity nitrogen or high-purity argon protective gas during the processing to graphitize, and (7) blending 1 pts. wt. graphitized organic components with 40-100 pts. wt. concentrated sulfuric acid and 6-9 pts. wt. concentrated phosphoric acid. USE - The three-dimensional porous graphene is useful for modification and modification of variety of materials e.g. catalysts, resistance gas sensors, lithium ion batteries, super capacitors, and modified concrete fields. ADVANTAGE - The method provides high-quality three-dimensional porous graphene in large quantities; and contributes to the research and development of its downstream products e.g. pollutant adsorption, resistive gas sensors, lithium ion batteries, super capacitors, and modified cement concrete. DETAILED DESCRIPTION - Economical preparation of three-dimensional porous graphene comprises (1) selecting residual coal source of coal gangue including anthracite, bituminous coal, sub-bituminous coal, and lignite, (2) mechanically pulverizing the selected coal gangue residual coal source, (3) separating organic components and mineral components from the pulverized residual coal source by flotation, (4) ball milling the separated organic component wet powder to 200-500 meshes sieve, (5) adding catalyst and nano-scale organic components to blend and grind to obtain a uniform mixture, where the mass ratio of catalyst to organic components is 0.1-1:1, (6) treating the above mixture at a high temperature of 2000-3000 degrees C for 1-24 hours, and filling in high-purity nitrogen or high-purity argon protective gas during the processing to graphitize, (7) blending 1 pts. wt. graphitized organic components with 40-100 pts. wt. concentrated sulfuric acid and 6-9 pts. wt. concentrated phosphoric acid, stirring in an ice water bath to obtain a uniform mixed solution, add 25-60 pts. wt. potassium permanganate, warming to 30-40 degrees C, reacting for 90-150 minutes, adding 50-120 pts. wt. deionized water, heating to 80-100 degrees C, reacting for 15-30 minutes, adding 7-10 pts. wt. hydrogen peroxide, stirring to golden yellow, centrifuging, washing and using ultrasonic shearing to break to obtain an aqueous solution of graphene oxide, vacuum drying the obtained graphene oxide aqueous solution, and passing through a 500-mesh sieve to obtain graphene oxide powder, and (8) blending the obtained graphene oxide powder, reducing agent and deionized water, stirring uniformly, adding in a reactor lined with polytetrafluoroethylene or directly in a beaker of any shape, controlling the reaction temperature at 90-180 degrees C for 3-8 hours, carrying out the synthesis under the pressure of water, and in-situ self-assembly to obtain variety of three-dimensional porous graphene.