• 专利标题:   Preparing nitrogen and sulfur co-doped pH responsive graphene quantum dots used in pH value responsive reagent for selective iron detection, involves mixing carbon source compound and nitrogen and sulfur source compound, carrying out a hydrothermal reaction, centrifuging and filtering.
  • 专利号:   CN115926789-A
  • 发明人:   LI D, YAN J, ZHOU Y, LIU X
  • 专利权人:   UNIV CHINA THREE GORGES
  • 国际专利分类:   B82Y020/00, B82Y040/00, C01B032/15, C09K011/65, G01N021/64, G01N021/80
  • 专利详细信息:   CN115926789-A 07 Apr 2023 C09K-011/65 202337 Chinese
  • 申请详细信息:   CN115926789-A CN11229533 09 Oct 2022
  • 优先权号:   CN11229533

▎ 摘  要

NOVELTY - Preparing nitrogen and sulfur co-doped pH responsive graphene quantum dots involves mixing the carbon source compound and the nitrogen and sulfur source compound containing nitrogen and sulfur, carrying out a hydrothermal reaction, centrifuging and filtering the reacted solution to prepare nitrogen and sulfur co-doped pH responsive graphene quantum dots. USE - Method for preparing nitrogen and sulfur co-doped pH responsive graphene quantum dots used in pH value responsive reagent for selective iron (Fe3+) detection (all claimed). ADVANTAGE - The preparation method is simple in process and low in cost, and the prepared graphene quantum dot solution not only has a good linear relationship between pH=2-7, serves as a fluorescent probe for detecting metal ions, and quickly detects metal ions Fe3+ in water within 30 seconds. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: i. nitrogen and sulfur co-doped pH responsive graphene quantum dots; ii. selective iron (Fe3+) detection method, which involves carrying out detection of Fe3+by fluorescence spectrophotometry, where the solution used in the fluorescence spectrophotometry is formed by mixing phosphate buffered saline (PBS) buffer solution, ferric nitrate solution and N, S co-doped graphene quantum dots. iii. A pH value responsive reagent in aqueous solution, which comprises nitrogen and sulfur co-doped pH responsive graphene quantum dots, where the response range of nitrogen and sulfur co-doped pH responsive graphene quantum dots in the aqueous solution is 2.5-7.5.