▎ 摘　　要

NOVELTY - Color nanocomposite comprises amino-functionalized surface of graphene oxide and carboxyl-modified manganese-doped nanocrystals, where the carboxyl-modified manganese-doped nanocrystals comprise covalent coupling, mercapto group and a carboxyl functional group-modified compound. USE - Color nanocomposite. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing color nanocomposite, which involves: (A) preparing amino-functionalized surface of graphene oxide by refluxing thionyl chloride with graphene oxide under the protection of the inert gas; (B) removing the unreacted substance after washing; (C) vacuum drying to obtain the product; (D) processing the product under the protection of nitrogen for 72 hours; (E) cooling the product to room temperature; (F) vacuum drying and removing the solvent to obtain the amino-functionalized surface of graphene oxide; (G) dissolving nano zinc in deionized water; (H) dissolving manganese acetate in the solution; (I) introducing nitrogen gas to the solution; (J) adding the sodium sulfide to the solution; (K) refluxing and strongly stirring the mixture for 5 hours; (L) cooling and centrifuging the mixture to obtain manganese-doped zinc sulfide nano-crystals; (M) ultrasonically dispersing nano-crystals in water for further use; (N) dissolving mercaptoacetic acid or mercaptopropionic acid in the solution; (O) stirring the solution for 12-48 hours; and (P) stirring the mixture for 0.5-5 hoursto obtain the desired product.