• 专利标题:   Developing blue emitting graphene quantum dots (GQDs) from graphene oxide involves solvothermal cutting of graphene oxide, purifying obtained GQD solution through PTFE membrane and dialyzing filtrate of GQD solution.
  • 专利号:   IN201931003535-A
  • 发明人:   GHORAI S, DASH P S, ROY I, DIPANKAR C
  • 专利权人:   TATA STEEL LTD, UNIV CALCUTTA
  • 国际专利分类:   A61M001/16, B82Y030/00, B82Y040/00, C01B032/182, C01B032/184
  • 专利详细信息:   IN201931003535-A 31 Jul 2020 B82Y-040/00 202071 Pages: 24 English
  • 申请详细信息:   IN201931003535-A IN31003535 29 Jan 2019
  • 优先权号:   IN31003535

▎ 摘  要

NOVELTY - Developing blue emitting graphene quantum dots (GQDs) from graphene oxide, comprises: solvothermal cutting of graphene oxide at 175-200 degrees C for 6-8 hours to obtain a GQD solution; purifying the GQD solution through 0.45 mm PTFE membrane; and dialyzing a filtrate of the GQD solution in 1000 Da dialysis bag. USE - The method is useful for developing blue emitting graphene quantum dots from graphene oxide. ADVANTAGE - The method: utilizes single step and direct synthesis approach by using graphene oxide as a precursor material; involves an acid/alkali and chemical solvent-free solvothermal technique, hence does not require neutralization of strong acids, and involves a simple, recycling and environmentally friendly purification process, effective for scale up synthesis at high yield; is economical; provides a moderately high (60%) product yield; and develops blue emitting graphene quantum dots which exhibit blue photoluminescence property with significantly high quantum yield (19.5%) efficiency than other reported graphene oxide based work and exhibit uniform distribution of particle size of 2-6 nm.