One-step preparation of nitrogen-doped graphene quantum dots from oxidized debris of graphene oxide

Chaofan Hu; Yingliang Liu; Yunhua Yang; Jianghu Cui; Zirong Huang; Yaling Wang; Lufeng Yang; Haibo Wang; Yong Xiao; Jianhua Rong

doi:10.1039/C2TB00189F

One-step preparation of nitrogen-doped graphenequantum dots from oxidized debris of graphene oxide†

Chaofan Hu,^a Yingliang Liu,*^b Yunhua Yang,^a Jianghu Cui,^a Zirong Huang,^a Yaling Wang,^a Lufeng Yang,^a Haibo Wang,^a Yong Xiao^b and Jianhua Rong*^c

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* Corresponding authors

^a Department of Chemistry, Jinan University, Guangzhou 510632, China

^b College of Science, South China Agricultural University, Guangzhou 510642, China
E-mail: tliuyl@163.com
Fax: + 86 20 85221813
Tel: + 86 20 85280323

^c Department of Material Science and Engineering, Jinan University, Guangzhou 510632, P.R. China
E-mail: trong@jnu.edu.cn
Tel: + 86 20 85222860

Abstract

Highly blue-luminescent nitrogen-doped graphene quantum dots (N-GQDs) are obtained by hydrothermal treatment of graphene oxide in the presence of ammonia. The yield of N-GQDs is about 8.7% in weight. A high quantum yield of maximum 24.6% at an excitation wavelength of 340 nm is achieved. They are applied for bioimaging of HeLa cells, and showed bright luminescence and excellent biocompatibility.

Journal of Materials Chemistry B

One-step preparation of nitrogen-doped graphenequantum dots from oxidized debris of graphene oxide†

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One-step preparation of nitrogen-doped graphene quantum dots from oxidized debris of graphene oxide

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