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RESEARCH ARTICLE
Contents Vol 69(3)

Microwave-Assisted Synthesis of Nitrogen-Doped Multi-Layer Graphene Quantum Dots with Oxygen-Rich Functional Groups

Xiaobei Hou A B C , Yibing Li A and Chuan Zhao A D
+ Author Affiliations
- Author Affiliations

A School of Chemistry, The University of New South Wales, Sydney, NSW 2052, Australia.

B Shanghai University of Medicine and Health Sciences, Shanghai 200093, China.

C Shanghai Medical Instrumentation College, Shanghai 200093, China.

D Corresponding author. Email: chuan.zhao@unsw.edu.au

Australian Journal of Chemistry 69(3) 357-360 https://doi.org/10.1071/CH15431
Submitted: 17 July 2015  Accepted: 27 August 2015   Published: 22 September 2015

Abstract

Strong green-luminescent nitrogen-doped multi-layer graphene quantum dots (N-GQDs) have been prepared via a microwave-assisted hydrothermal method using glucose and urea as the starting materials. The fabricated N-GQDs show a highly crystalline structure and consist of ~3–10 graphene layers with an N/C atomic ratio 5.7 %. The wavelength-dependent luminescence emission behaviour is observed with a photoluminescence quantum yield of 5.2 %. The combination of the unique optical properties introduced by nitrogen doping with the high solubility in aqueous medium offered by the surface oxygen-rich functional groups in N-GQDs provides additional advantages for their potential applications in biolabelling and bioimaging.


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