Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 32, Pages 4908-4915Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30877d
Keywords
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Funding
- Research Grants Council of Hong Kong [PolyU 5013/09P]
- HK PolyU grants [G-YJ70, 1-ZV8N]
- Key Project of Applied Basic Research of Yunnan Province [2012FA003]
- National Natural Science Foundation of China [61106098, 61066004]
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The doping of carbon-based materials is of great importance due to its ability to modulate their optical, electrical and optoelectronic properties. Nitrogen-doped graphene quantum dots (N-GQDs) have received significant attention due to their superior electrocatalytic activity, optical properties and biocompatibility. The energy-level structure of N-GQDs remains unknown, which hinders the development of N-GQDs for various applications. Here, we report a one-pot synthesis method to prepare large-quantity N-GQDs at room temperature and atmospheric pressure under a prolonged reaction time. Using this approach, we can effectively dope N into the N-GQDs. As revealed by electron energy loss spectroscopy, N-doping introduces a new energy level into the electronic structure, which is responsible for tuning the optical properties of the N-GQDs.
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