▎ 摘　　要

NOVELTY - Preparing folic acid functionalized graphene oxide comprises (i) activating carboxy group of the folic acid to obtain a folic acid active ester, (ii) reacting folic acid active ester with maleimide to obtain maleic acid functionalized folic acid, (iii) grafting maleimide functionalized folic acid with graphene oxide to obtain folic acid functionalized graphene oxide. USE - The method is useful for preparing folic acid functionalized graphene oxide. ADVANTAGE - The method: has high graft rate; and is simple and fast.