▎ 摘　　要

NOVELTY - Preparing graphene quantum dot involves placing brown-black humic acid in hydrogen peroxide solution for oxidation reaction to obtain graphene quantum dot solution, filtering graphene quantum dot solution, dialyzing, freezing, and drying to obtain the graphene quantum dot. USE - Method for preparing graphene quantum dot used for preparing polyphenylene sulfide-graphene quantum dot composite material for electronic appliance or communication equipment or automobile field (all claimed). ADVANTAGE - The prepared graphene quantum dots has good water solubility and high fluorescence intensity, and the polyphenylene sulfide/graphene quantum dot composite material can be prepared by using as a raw material by thermoplastic processing, and is prepared by eco-friendly, the performance of the processed material can be fully exerted, and the production efficiency is high. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1)a polyphenylene sulfide/graphene quantum dot composite material, which is: prepared by taking 0.1-5 pts. wt. graphene quantum dot as raw material, and 100 pts. wt. polyphenylene sulfide; and (2)a method for preparing polyphenylene sulfide/graphene quantum dot composite material, which involves: mixing uniformly polyphenylene sulfide resin and the graphene quantum dots in proportion to obtain a mixed raw material, and extruding the obtained mixed raw material at a temperature of 285-320degrees Celsius to obtain a polyphenylene sulfide/graphene quantum dot composite material. DESCRIPTION OF DRAWING(S) - The drawing shows a fluorescence emission spectra of the prepared graphene quantum dots under different excitation wavelength.