▎ 摘　　要

NOVELTY - Preparation of multi-hole graphene comprises preparing 1-5 mg/mL aqueous graphene solution using graphene powder as solute and deionized water as solvent; adding transition metal oxide and stirring to obtain first mixture; adding concentrated sulfuric acid and stirring; reacting at 40-90 degrees C for 2-5 hours; vacuum filtering; and drying residue at 60-80 degrees C for 6-12 hours to obtain nano graphene metal oxide; and mixing acid and deionized water, adding product in first step, stirring at 40-90 degrees C for 1-3 hours, filtering, and drying at 60-80 degrees C for 4-12 hours. USE - Method for preparing multi-hole graphene (claimed). DETAILED DESCRIPTION - Preparation of multi-hole graphene comprises: (A) preparing 1-5 mg/mL aqueous graphene solution using graphene powder as solute and deionized water as solvent; adding transition metal oxide and stirring to obtain first mixture, where mass ratio of transition metal oxide to graphene is 1-20:1; adding concentrated sulfuric acid and stirring, where volume ratio of concentrated sulfuric acid and first mixture is 1-4:100; reacting at 40-90 degrees C for 2-5 hours; vacuum filtering; and drying residue at 60-80 degrees C for 6-12 hours to obtain nano graphene metal oxide; and (B) mixing acid and deionized water at ratio of 50:100, adding product in first step, and stirring at 40-90 degrees C for 1-3 hours, where mass-volume ratio of nano graphene metal oxide to acid solution is 1-5:100; filtering; and drying at 60-80 degrees C for 4-12 hours.