▎ 摘　　要

NOVELTY - Preparing graphene/zinc oxide modified quantum dot photocatalytic material comprises e.g. adding graphene solution into deionized water, ultrasonically dispersing to obtain uniform dispersion of graphene aqueous solution, adding zinc acetate and magnesium acetate into deionized water, dissolving in graphene aqueous solution, ultrasonically dispersing, adding aqueous solution of oxalic acid to obtain colloidal solution, adding pore forming agent solution into colloidal solution, drying colloid to obtain graphene/zinc oxide photocatalyst material precursor powder and calcining precursor powder. USE - The method is useful for preparing graphene/zinc oxide modified quantum dot photocatalytic material (claimed). ADVANTAGE - The method improves light quantum yield and catalytic activity, realizes storage and release of photo-generated electron band structure engineering design. DETAILED DESCRIPTION - Preparing graphene/zinc oxide modified quantum dot photocatalytic material comprises (i) adding 5-15 ml concentration of 0.8-1.2 g/l graphene solution into 50-70 ml deionized water, ultrasonically dispersing to obtain uniform dispersion of graphene aqueous solution, then adding 3.3-5.5 g zinc acetate and 0.24-0.96 g magnesium acetate into 50-100 ml deionized water, dissolving in graphene aqueous solution, stirring, ultrasonically dispersing for 15-30 minutes, transferring to 70-90 degrees C constant temperature environment, then adding 1-2 mol/l concentration of 50-100 ml aqueous solution of oxalic acid to obtain colloidal solution, adding 5-8 ml pore forming agent solution into colloidal solution, ultrasonically agitating for 24-36 hours, then drying colloid to obtain xerogel, and grinding to obtain graphene/zinc oxide photocatalyst material precursor powder, (ii) calcining precursor powder at 400-600 degrees C for 1-3 hours under protective atmosphere, naturally cooling, and grinding to obtain graphene/zinc oxide photocatalytic material, and (iii) dispersing 5-10 g graphene/zinc oxide photocatalyst material in 50-100 ml absolute ethanol, adding 20-45 ml oxide quantum dot solution, stirring, then evaporating resulting solution to dryness, and grinding graphene to obtain quantum dot modified graphene/zinc oxide photocatalytic material, where the preparation method of oxide quantum dot solution comprises adding 8-10 g oxide powder into 800-1000 ml water, ultrasonically dispersing, and stirring to obtain oxide powder dispersion, then ultrasonically vibrating, dispersing oxide powder dispersion for 1-3 hours, and then centrifuging at a speed of 8000-10000 revolution/minute to obtain oxide quantum dot solution.