• 专利标题:   Large-scale preparation graphene quantum dots, comprises adding graphene oxide into first solvent to obtain first dispersion solution, adding reducing agent, reacting, carrying out solid-liquid separation and cooling to obtain crude product.
  • 专利号:   WO2015106437-A1, EP3085665-A1, US2016325999-A1, EP3085665-A4, JP2017510534-W, US9663370-B2, JP6271745-B2, EP3085665-B1
  • 发明人:   ZHANG M, ZHANG L
  • 专利权人:   SHENZHEN CANTONNET ENERGY SERVICES CO, CARBON NANO ENG SYSTEMS CORP
  • 国际专利分类:   C01B031/04, C09K011/65, C01B032/15, B82Y020/00, B82Y040/00, C01B032/18, C01B032/182, B82Y030/00, C01B032/20
  • 专利详细信息:   WO2015106437-A1 23 Jul 2015 C01B-031/04 201553 Pages: 29 Chinese
  • 申请详细信息:   WO2015106437-A1 WOCN070804 17 Jan 2014
  • 优先权号:   EP878575, JP547043, WOCN070804, US15109817

▎ 摘  要

NOVELTY - Large-scale preparation graphene quantum dots, comprises adding graphene oxide into a first solvent to obtain a first dispersion solution; adding a reducing agent into the first dispersion solution to obtain a mixed solution; reacting, carrying out solid-liquid separation after cooling and taking the solids to obtain a crude product; mixing reductive polyhydroxy aldehyde and organic acid with the crude product; adding a Lewis acid and mixing to obtain a mixture; adding the mixture to a second solvent to obtain a second dispersion solution; reacting, stripping, and separating and purifying. USE - The method is useful for large-scale preparation graphene quantum dots (claimed). ADVANTAGE - The large-scale preparation is completed by a microwave-solvothermal method, has simple process, achieves high utilization rate of graphene oxide, and produces high yield of graphene quantum dots. DETAILED DESCRIPTION - Large-scale preparation graphene quantum dots, comprises adding graphene oxide into a first solvent to obtain a first dispersion solution; adding a reducing agent into the first dispersion solution to obtain a mixed solution; reacting the mixed solution in a microwave environment at 500-800 watts for 10-60 minutes, carrying out solid-liquid separation after cooling and taking the solids to obtain a crude product; mixing one of a reductive polyhydroxy aldehyde and an organic acid with the crude product; adding a Lewis acid and uniformly mixing to obtain a mixture; adding the mixture to a second solvent to obtain a second dispersion solution; reacting the second dispersion solution in the microwave environment at 500-800 watts for 0.2-1 hour, then stripping in an ultrasound environment at 120-300 watts for 2-3 hours, and separating and purifying to obtain the graphene quantum dots.