▎ 摘　　要

NOVELTY - Preparing nitrogen-phosphorus-doped porous graphene comprises e.g. placing 4-vinyl benzyl chloride, triphenylphosphine and acetone in a dry flask of magnetic stirring device, reacting, filtering, washing with acetone, drying to obtain polyionic liquid (PIL) monomer product, adding allyl glycidyl ether and azodiisobutyronitrile in methanol solution, reacting, adding ether solution, precipitating, filtering, washing and drying to obtain phosphorus-containing polyionic liquid (PPIL) product, adding graphene oxide in water, dispersing, adding aqueous ammonia, and drying. USE - The porous graphene is used in super capacitor, safety detection and catalytic field. ADVANTAGE - The porous graphene material has thin hole wall, large specific surface area and pore size, and is uniform and stable. The method uses widely available raw material source, is simple and easy to operate, is suitable for large scale industrialized production. DETAILED DESCRIPTION - Preparing nitrogen-phosphorus-doped porous graphene comprises (i) placing 8.4-84 g 4-vinyl benzyl chloride, 14.9-149 g triphenylphosphine and 50-500 ml acetone in a dry flask of magnetic stirring device, reacting for 5-50 hours under the protection of nitrogen atmosphere in water bath of 45 degrees C, then filtering, washing with acetone, drying in a vacuum oven for 12 hours to obtain the product named as polyionic liquid (PIL), (ii) adding 2.074-20.74 g PIL monomer, 3-30 g allyl glycidyl ether, and 0.04-0.4 g azodiisobutyronitrile in 13-1300 ml methanol solution, reacting at 70 degrees C for 3-10 hours, adding ether solution to precipitate and filtering the precipitate product, washing 3 times using tetrahydrofuran and deionized water and drying for 12 hours in vacuum to obtain the product named as phosphorus-containing polyionic liquid (PPIL), and (iii) adding 16-512 mg PPIL and 32-320 mg graphene oxide into 80-100 ml water, ultrasonically dispersing uniformly, adding 3-15 ml aqueous ammonia solution for 12 hours, cooling to room temperature, pumping, washing, drying for 12 hours under vacuum condition, then placing in a tubular furnace, heating to 700-800 degrees C at a speed of 5 degrees C/minute under the protection of argon gas condition, maintaining the temperature for 1 hour and cooling to room temperature to obtain the needed product.