• 专利标题:   Making polychromatic fluorescent polyetherimide functionalized graphene quantum dots involves dispersing graphene oxide in ethanol/water, adding ammonium hydroxide and polyetherimide, then placing into reactor, cooling, filtering and drying.
  • 专利号:   CN103980893-A, CN103980893-B
  • 发明人:   GUO B, WANG H, WANG J, WANG X
  • 专利权人:   UNIV TAIYUAN TECHNOLOGY
  • 国际专利分类:   C01B031/04, C09K011/65
  • 专利详细信息:   CN103980893-A 13 Aug 2014 C09K-011/65 201473 Chinese
  • 申请详细信息:   CN103980893-A CN10236019 30 May 2014
  • 优先权号:   CN10236019

▎ 摘  要

NOVELTY - Forming polychromatic fluorescent polyetherimide (PEI) functionalized graphene quantum dots involves: dispersing graphene oxide sheet in ethanol/water at a concentration of 5-100 mg/10 ml of solution, adding ammonium hydroxide to regulate pH at 12, adding 0.2 plus minus 0.01 g PEI per 40 ml of solution, then transferring solution into reactor at 100-200 degrees C for 1-24 hours, naturally cooling, filtering to obtain stock solution; and drying stock solution over anhydrous sodium sulfate, purifying the product using gradient column chromatography, and collecting purified product. USE - For forming polychromatic fluorescent polyetherimide (PEI) functionalized graphene quantum dots (claimed) which are useful in optoelectronic materials, and for bio-imaging, and targeted drug delivery. ADVANTAGE - The present method is simple, easy to operate and cost-effective; and produces quantum dots in an increased yield of 18.1% with high purity as compared to reference quantum dots. DETAILED DESCRIPTION - Preparation of polychromatic fluorescent polyetherimide (PEI) functionalized graphene quantum dots involves: dispersing graphene oxide sheet in ethanol or water at a concentration of 5-100 mg/10 ml of solution, adding 25% ammonium hydroxide to regulate pH at 12, adding 0.2 plus minus 0.01 g polyetherimide (PEI) per 40 ml of solution, then transferring the solution into reactor at 100-200 degrees C for 1-24 hours, naturally cooling, filtering to obtain PEI functionalized graphene quantum dots stock solution; and drying the stock solution over greater than 99% anhydrous sodium sulfate, purifying the product by using gradient column chromatography, and collecting the purified product.