▎ 摘　　要

NOVELTY - The preparation method of porous graphene involves weighing graphite, sodium nitrate, strong acid, oxidizing agent and hydrogen peroxide solution in a ratio of 1-10 g:0.5-5 g:23-230 ml:3-30 g:3-30 ml and then heating at 20-35 degrees C for 3-96 hours, adding ionic water to the mixture and then reacting for 20-60 minutes, adding deionized water to the mixture and then leaving, washing using hydrochloric acid and deionized water, adding deionized water, strong alkali solution and reducing agent to the mixture and then ultrasonically processing for 1-3 hours and drying. USE - The method is useful for preparation of porous graphene. ADVANTAGE - The method enables simple, safe and economical preparation of porous graphene with excellent stability and reliability.