▎ 摘　　要

NOVELTY - Preparation of reduction-oxidation graphene composite zinc metasilicate quantum dot photocatalyst, involves adding glucose to graphene oxide solution, stirring until glucose is completely dissolved, adding aqueous ammonia to solution (I), mixing to obtain solution (II), heating and reacting solution (II) in a water bath, cooling to room temperature, centrifuging and separating out the sample, washing with deionized water and absolute ethanol, drying to obtain reduced graphene oxide, adding the reduced graphene oxide and zinc oxide to distilled water, ultrasonically dissolving to obtain solution (III), adding potassium stannate and urea to solution (III), stirring to obtain solution (IV), reacting solution (IV) under heating and pressurizing conditions, cooling and filtering to obtain a white precipitate, washing the collected white precipitate, centrifuging and separating, and drying. USE - Preparation of reduction-oxidation graphene composite zinc metasilicate quantum dot photocatalyst. ADVANTAGE - The method provides quantum dots with an average particle diameter of 3-5 nm. Graphene has excellent electron transport property. The obtained photocatalyst has large specific surface area, broad light absorption region, improved separation rate of electrons and holes, and excellent photocatalytic efficiency in visible range.