▎ 摘　　要

NOVELTY - Preparing highly dispersed graphene oxide quantum dots comprises e.g. (i) adding the pulverized coal to the oxidizing acid solution, stirring, carrying out oxidation reaction to obtain the mixed solution A, (ii) subjecting mixed solution A to rotary evaporation to obtain residual solid, (iii) adding residual solid to deionized water, mixing to obtain a mixed solution B, (iv) adding activated carbon alkaline waste solution into mixed solution B to obtain mixed solution C, (v) filtering the mixed solution C to obtain filtrate 2, and (vi) freeze-drying the filtrate 2 to obtain final product. USE - The graphene oxide quantum dot is useful in photoelectric materials and device preparation, biomimetic, display, drug carrier, solar cells, anti-counterfeiting coating, new semiconductor body. ADVANTAGE - The method has low production cost, simple process and has excellent fluorescence effect, good monodispersity and good water solubility. DETAILED DESCRIPTION - Preparing highly dispersed graphene oxide quantum dots comprises (i) adding the pulverized coal to the oxidizing acid solution, and continuously stirring, carrying out the oxidation reaction to obtain the mixed solution A, (ii) subjecting mixed solution A to rotary evaporation under vacuum to obtain residual solid, (iii) adding the residual solid to deionized water and mixing uniformly to obtain a mixed solution B, (iv) adding activated carbon alkaline waste solution to the mixed solution B to neutralizing the solution pH to 7 to obtain mixed solution C, (v) filtering the mixed solution C using a hollow fiber filter having a molecular weight of 1 kilodalton to obtain a filtrate 1, then subjecting filtrate 1 to a hollow fiber having a molecular weight of 3 kilodaltons to obtain filtrate 2, and (vi) freeze-drying the filtrate 2 to obtain final product.