• 专利标题:   Amine-based modification of graphene quantum dots involves dispersing graphene quantum dots containing carboxyl group in water, heating, converting carboxyl group on surface of quantum dots into primary amide group, dispersing obtained solid in water, stirring, and dialyzing obtained solution.
  • 专利号:   CN115849358-A
  • 发明人:   WANG J, LU Y, GE M, ZHANG F, CUI D
  • 专利权人:   SHANGHAI NAT ENG RES CENT NANOTECHNOLOGY
  • 国际专利分类:   B82Y030/00, C01B032/194
  • 专利详细信息:   CN115849358-A 28 Mar 2023 C01B-032/194 202333 Chinese
  • 申请详细信息:   CN115849358-A CN11674697 26 Dec 2022
  • 优先权号:   CN11674697

▎ 摘  要

NOVELTY - Amine-based modification of graphene quantum dots involves (1) dispersing graphene quantum dots containing carboxyl groups in water to obtain a graphene quantum dot dispersion, (2) adding aqueous ammonia to the dispersion to neutralize its acidity, adding ammonium chloride as a nitrogen source, (3) heating, evaporating, converting carboxyl groups on the surface of the graphene quantum dots into primary amide group, (4) adding water to disperse solid obtained in step (3), adding sodium hypobromite under the protection of an ice bath, and rapidly stirring to obtain a reaction solution, and (5) dialyzing the reaction solution using a dialysis bag until the external solution does not make silver nitrate solution to precipitate. The dialysis bag contains amino-modified graphene quantum dots. USE - Amine-based modification of graphene quantum dots. ADVANTAGE - The method produces amine-modified graphene quantum dots with excellent dispersibility using simple reaction device, under mild reaction conditions. The existence form of nitrogen atom in the product is clear. The amine-modified graphene quantum dots are recycled by dialysis. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for amine-modified graphene quantum dots.