▎ 摘　　要

NOVELTY - A graphene is prepared by crushing disposable paper tableware, adding alkali solution, stirring, filtering, adding deionized water, washing with water, centrifuging, transferring into beaker, adding deionized water, washing to neutral, dispersing in 100-200 ml of 1 mol/L ferric salt solution, continuously stirring for 12-24 hours under nitrogen atmosphere, drying at 60-90 degrees C for 36 hours, carbonization treating to 1000-1400 degrees C for 30-60 minutes, strong acid washing for 2 hours, washing with deionized water to neutral, and vacuum drying to 60-80 degrees C. USE - Method for preparing graphene (claimed). ADVANTAGE - The method is simple and has high product yield. The graphene has excellent quality. DETAILED DESCRIPTION - A graphene is prepared by crushing 5-20 g disposable paper tableware, adding 300-600 ml of 1 mol/L alkali solution, stirring for 48-72 hours, filtering, adding 300-600 ml deionized water, washing with water, centrifuging at speed of 3000-5000 revolutions/minute for 10-30 minutes, transferring into beaker, adding deionized water, washing to neutral, dispersing in 100-200 ml of 1 mol/L ferric salt solution, continuously stirring for 12-24 hours under nitrogen atmosphere, drying at 60-90 degrees C for 36 hours, carbonization treating to 1000-1400 degrees C for 30-60 minutes, strong acid washing for 2 hours, washing with deionized water to neutral, and vacuum drying to 60-80 degrees C.