▎ 摘　　要

NOVELTY - A metal nanopoint regularly modified graphene sheet composite comprises graphene piece and metal nanopoint modified on surface of graphene sheet. The metal nanopoint is connected with graphene sheet by imide derivative molecule containing sulfhydryl. It has grain diameter of 1-3 nm. USE - Metal nanopoint regularly modified graphene sheet composite for nanocatalysis and electrochemical sensing. ADVANTAGE - The composite material has high dispersity, regular and stable structure, controllable density, and good electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of metal nanopoint regularly modified graphene sheet composite, comprising: (A) ultrasonically dissolving 2.5-5 mg of imide derivative molecule containing sulfhydryl into 1-2 ml of deionized water, adding into 10-20 ml of 0.5 mg/ml graphene oxide solution to mix, ultrasonically processing the mixed solution for 1-3 hours, centrifuging at 3000-5000 rpm, removing undissolvable substance, stirring at 30-60 degrees C overnight, and obtaining graphene oxide piece solution modified by imide derivative molecule containing sulfhydryl; (B) adding 7-14 mu l of 35% of hydrazine hydrate solution and 75-150 mu l of 28% ammonia aqueous solution into 10-20 ml of the graphene oxide piece solution, shaking the mixed solution for 3-5 minutes, stirring at 90-100 degrees C for 1-3 hours, obtaining graphene piece solution modified by imide derivative molecule containing sulfhydryl, and removing excess amount of hydrazine hydrate and imide derivative molecule containing sulfhydryl by a dialysis bag with molecular weight of 3500-5000; and (C) adding 1-5 ml of 0.1 mg/ml mercaptoacetic acid into 5-25 ml of graphene piece solution, adding 0.16-0.8 ml of 10 mM metal salt solution, continuously reacting overnight under stirring, and obtaining metal nanopoint regularly modified graphene sheet composite solution.