▎ 摘　　要

NOVELTY - Preparing sulfur-doped graphene quantum dots comprises uniformly mixing liquid paraffin and carbon disulfide in presence of light, placing slides above the flame, collecting glass slides, to obtain sulfur-doped carbon nanoparticles dispersants, performing ultrasonic liquid separation by adding dispersing agent to sulfur-doped carbon nanospheres, performing ultrasonic centrifugation by removing liquid phase, to obtain sulfur-doped graphene quantum dot solution and heating obtained sulfur-doped graphene quantum dot solution and drying, to obtain sulfur-doped graphene quantum dots. USE - The method is useful for preparing sulfur-doped graphene quantum dots (claimed). ADVANTAGE - The method produces product having effectively modulated graphene quantum dot structure and good energy level, good optical and electrical properties (claimed), good photoelectric property, increases extra level of graphene quantum point. DETAILED DESCRIPTION - Preparing sulfur-doped graphene quantum dots comprises (i) uniformly mixing liquid paraffin and carbon disulfide in presence of light, placing the slides above the flame, collecting glass slides, to obtain sulfur-doped carbon nanoparticles dispersants; (ii) carrying out ultrasonic liquid separation by adding dispersing agent to sulfur-doped carbon nanospheres, carrying out ultrasonic centrifugation by removing liquid phase, collecting supernatant, to obtain sulfur-doped graphene quantum dot solution; and (iii) heating the step (ii) obtained sulfur-doped graphene quantum dot solution and drying, to obtain sulfur-doped graphene quantum dots.