▎ 摘　　要

NOVELTY - Preparing graphene quantum dot rich in amino group involves weighing certain amount of polyethylene imine water solution and placing in the vessel, where the mass fraction of the polyethyleneimine water solution is 35-95%, placing polyethyleneimine solution in a container heated uniformly, heating to 90-150degrees Celsius, keeping the constant temperature for 1-60 minutes, then removing the heating source, slowly adding 300% ultra-pure water, adding ultra-pure water in the process, not stopping stirring the polyethyleneimine solution, ensuring both fully mixing, cooling to normal temperature, dialyzing for 2-4 days with large molecular weight dialysis bag, liquid the dialysis bag, vacuum rotary steaming to small volume, then using small molecular weight dialysis bag to dialyze for 2-4 days, dialyzing the solution in the bag is the prepared amino-rich graphene quantum dot solution USE - Method for preparing graphene quantum dot rich in amino group used in drug targeting transportation, living tracer, drug treatment and prognosis monitoring function of multifunctional nano system. ADVANTAGE - The method is simple and mild. The aminated graphite quantum dot prepared by the method has high amine content content, uniform size, and improves the amine load amount and stability, which is good for realizing industrialization.