▎ 摘　　要

NOVELTY - Preparing palladium quantum dot doped graphene-based conductive ink comprises (i) providing graphite powder, using modified Hummers method to prepare graphene oxide, centrifuging and resuspending in acetone to obtain graphene oxide acetone dispersion; (ii) adding heteropolyacid into the graphene oxide acetone dispersion, stirring, mixing, centrifuging to collect the first precipitate, drying, resuspending the first precipitate with acetone, adding palladium acetylacetonate, stirring and mixing again, centrifuging to collect the second precipitate, drying, placing the second precipitate in a hydrogen environment for reduction to prepare palladium quantum dot-doped graphene, and resuspending in ethanol to prepare a palladium quantum dot-doped graphene dispersion; and (ii) taking first dispersant, stirring, adding palladium quantum dot-doped graphene dispersion and conductive carbon black into the first dispersant to obtain palladium quantum dot-doped graphene-charcoal black paste. USE - The palladium quantum dot doped graphene-based conductive ink is useful for preparing graphene conductive film (claimed). ADVANTAGE - The method: can produce ink with considerable flexibility, toughness, hardness and adhesion which can be printed on a variety of substrates, and has the characteristics of high temperature resistance and long shelf life. DETAILED DESCRIPTION - Preparing palladium quantum dot doped graphene-based conductive ink comprises (i) providing graphite powder, using modified Hummers method to prepare graphene oxide, centrifuging and resuspending in acetone to obtain graphene oxide acetone dispersion; (ii) adding heteropolyacid into the graphene oxide acetone dispersion, stirring, mixing, centrifuging to collect the first precipitate, drying, resuspending the first precipitate with acetone, adding palladium acetylacetonate, stirring and mixing again, centrifuging to collect the second precipitate, drying, placing the second precipitate in a hydrogen environment for reduction to prepare palladium quantum dot-doped graphene, and resuspending in ethanol to prepare a palladium quantum dot-doped graphene dispersion; (ii) taking 50-250 pts. wt. the first dispersant, stirring, adding 15-40 pts. wt. palladium quantum dot-doped graphene dispersion and 5-25 pts. wt. conductive carbon black into the first dispersant slowly to obtain palladium quantum dot-doped graphene-charcoal black paste; (iii) taking 50-250 pts. wt. first dispersant, stirring, adding 5-20 pts. wt. the peeling resin into the first dispersant slowly to prepare a resin slurry; (iv) adding the resin slurry and 50-200 pts. wt. the second dispersant slowly drop wise into the stirred palladium quantum dot-doped graphene-carbon black slurry respectively, transferring the mixture to a 70-100 degrees C high-pressure reactor, reacting for 0.5-2 hours, cooling naturally, and stirring during the reaction to obtain a palladium quantum dot doped graphene-based mixed solution; and (v) adding 0.5-2.5 pts. wt. structure stabilizer, 0.5-2.5 pts. wt. polyacrylonitrile-maleic anhydride copolymer and 5-10 pts. wt. leveling agent and stirring at 1000-5000 revolutions/minute for 0.5-6 hours to prepare palladium quantum dot doped graphene-based conductive ink, where the heteropoly acid comprises phosphomolybdic acid, silimolybdic acid, phosphotungstic acid and silicotungstic acid.An INDEPENDENT CLAIM is also included for palladium quantum dot doped graphene-based conductive ink, prepared as mentioned above.