Preparation of Nitrogen-doped Graphene Quantum Dots and Its Fe-ion Fluorescence Sensing in Xinjiang Institute of Physics and Chemistry
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Nitrogen-doped graphene quantum dots (QDs) have low toxicity, good water solubility, and high photostability, making them more and more widely used in optoelectronic devices, photocatalysis, sensing, and bioimaging. The rapid preparation of nitrogen-doped graphene quantum dots and simple separation are of great significance to the above research fields.
Institute of Environmental Science and Technology, Xinjiang Institute of Physics and Chemistry, Chinese Academy of Sciences Researchers use high-nitrogen-content, surface-specific metal-organic framework compounds (MOFs) to guide porous carbon materials as starting materials, using a unique nitric acid vapor strategy, quickly and easily. Nitrogen-doped graphene quantum dots with uniform particle size and abundant surface functional groups were obtained. The fluorescence sensor was constructed using the quantum dot as a fluorescent probe, and a sensitive, rapid, and specific detection of iron ions was realized. The detection limit was as low as 80 nM. This study also shows that by selecting appropriate metal-organic framework compound-oriented carbon materials, it is expected that other heteroatom-doped graphene quantum dots can be quickly and easily prepared, which greatly broadens the application range of MOFs-based materials.
The research results have been published in the Journal of Materials Chemistry C. The related research work has obtained the "Hundred Talents Program" of the Chinese Academy of Sciences, the "Light of the West" of the Chinese Academy of Sciences, the National Natural Science Foundation, the Xinjiang Youth Uyghur Autonomous Region Youth Science and Technology Innovation Talent Training Project, and international cooperation projects. Funding.
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