Manipulation of 3D nanocarbon hybrids toward synthesis of N-doped graphene quantum dots with high photoluminescence quantum yield

Ning Xie, Long Tan, Hua Fei Li, Hai Yan Hu, Chen Wang, Ming Pan, Fan Wu, Ping Wu, Xiao Di Wang, Zheling Zeng, Shuguang Deng, Gui Ping Dai

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1 Scopus citations

Abstract

Synthesis of heteroatom-doped graphene quantum dots (GQDs) via a top-down approach is still challenging. Herein, we conveniently synthesized nitrogen-doped GQDs (N-GQDs) via an electrochemical method. In that, the N-containing 3D nanocarbon hybrids were prepared as the carbon and nitrogen sources, which were cut into small fragments in ammonia solution as the electrolyte. Interestingly, N-atoms from the 3D nanocarbon hybrids were successfully retained or converted into other types of N in the obtained GQDs, resulting to a highly doped N content up to 12.3% even after excluding the amino- and pyrrolic N at edges of the N-GQDs. As a matter of fact, the synthesized N-GQDs showed highly crystallized structure, and demonstrated a high photoluminescence quantum yield of ∼19.3%, among the highest values of top-down approach synthesized GQDs. Moreover, it can be also used for adjusting the absorption range of GQDs. Overall, we developed a new strategy to synthesize N-doped GQDs by controlling the carbon source, which opens a new avenue toward achieving other types of heteroatom-doped GQDs.

Original languageEnglish (US)
Article number116827
JournalJournal of Luminescence
Volume219
DOIs
StatePublished - Mar 2020

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ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Xie, N., Tan, L., Li, H. F., Hu, H. Y., Wang, C., Pan, M., Wu, F., Wu, P., Wang, X. D., Zeng, Z., Deng, S., & Dai, G. P. (2020). Manipulation of 3D nanocarbon hybrids toward synthesis of N-doped graphene quantum dots with high photoluminescence quantum yield. Journal of Luminescence, 219, [116827]. https://doi.org/10.1016/j.jlumin.2019.116827