▎ 摘　　要

NOVELTY - Preparation of fractal-aggregated graphene oxide nanoparticles involves (s1) mixing a proper amount of pure graphene (PG) powder, lithium hydroxide monohydrate powder, ethanol solution and deionized water to obtain a mixed system, (s2) placing the mixed system in ultrasonic reaction kettle, and reacting for 6-10 hours to obtain a reaction product containing insoluble substance and a liquid substance, and (s3) separating and removing insoluble substances in the reaction product, and purifying the liquid substance. The pure graphene powder and lithium hydroxide monohydrate powder are added in the ethanol solution with molar ratio of 6C-monobenzene unit to lithium hydroxide monohydrate powder being (95-100): (5-50). USE - Preparation of fractal-aggregated graphene oxide nanoparticles (claimed). ADVANTAGE - The method enables to prepare fractal-aggregated graphene oxide nanoparticles, which has excellent optical absorption and photoluminescence characteristics, and controls the range of the short range and long range energy transfer of oxidation graphene core and aggregate by controlling the crushing scale of the oxidized nano particles aggregate, and is wider and deeper in the characteristics and optical absorption. The key effect of lithium hydroxide on the formation of graphene oxide nanoparticles (GONPs) by sonolysis is provided, which plays an important role in the morphology, interfacial oxidation chemistry, aging scenarios, and spectroscopic profiles of graphene oxide nanoparticles (GONPs). The acoustic chemical oxidation process of the lithium hydroxide content on the graphene oxide nanoparticles and final composition of the oxygen-containing interface organic group, has a control effect, and also provides the fractal aggregation of the graphene oxide nanoparticles can occur in a large range of 2-200 nm. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for graphene oxide nanoparticles, which have particle size of 2-8 nm.