Preparation of blue- and green-emissive nitrogen-doped graphene quantum dots from graphite and their application in bioimaging

We demonstrate a novel top-down approach for nitrogen-doped graphene quantum dots preparation, in which the low cost graphite was used as a precursor, ammonium persulfate as an oxidative molecule and nitrogen source, and H2O2 as an oxidative agent, N-methyl-2-pyrrolidone as a solvent and potential functionalizer

Hameed Shah; Wenjing Xie; Yuanyuan Wang; Xinrui Jia; Asmat Nawaz; Qi Xin; Maoyong Song; Jian Ru Gong

2020

Scholarcy highlights

  • Owing to the superior photoluminescence property, low toxicity and good biocompatibility, nitrogen-doped graphene quantum dots have been regarded as promising nanomaterials for biological applications such as bioimaging
  • A simple and eco-friendly method was developed for preparation of nitrogen-doped graphene quantum dots
  • The nitrogen-doped graphene quantum dots with superior fluorescent properties can be used for bioimaging applications
  • We demonstrate a novel top-down approach for NGQDs preparation, in which the low cost graphite was used as a precursor, ammonium persulfate as an oxidative molecule and nitrogen source, and H2O2 as an oxidative agent, N-methyl-2-pyrrolidone as a solvent and potential functionalizer
  • The solvent extraction was applied for the first time to purify NGQDs
  • The synthesis idea in our work might be applicable to obtain other kinds of quantum dots from the readily obtainable bulk materials

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