Gram-scale synthesis of high-purity graphene quantum dots with multicolor photoluminescence

Fuchi Liu; Yuanyuan Sun; Yongping Zheng; Nujiang Tang; Ming Li; Wei Zhong; Youwei Du

doi:10.1039/C5RA19219F

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Gram-scale synthesis of high-purity graphene quantum dots with multicolor photoluminescence†

Fuchi Liu,^ab Yuanyuan Sun,^a Yongping Zheng,^a Nujiang Tang,*^a Ming Li,^a Wei Zhong^a and Youwei Du^a

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* Corresponding authors

^a Nanjing National Laboratory of Microstructures & Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People’s Republic of China
E-mail: tangnujiang@nju.edu.cn

^b College of Physics and Technology, Guangxi Normal University, Guilin 541004, People’s Republic of China

Abstract

A gram-scale approach has been developed to prepare highly pure graphene quantum dots (GQDs) from Vulcan XC-72 carbon black refluxed with concentrated nitric acid using a home-built experimental system. The weight of the GQDs is high, up to 1.2 g in each run with a yield of 75 wt%, and the purity is 99.96 wt%. The results show that the GQDs exhibit multicolor photoluminescence from green to light red under different excitation wavelengths.

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Article information

DOI: https://doi.org/10.1039/C5RA19219F
Article type: Communication
Submitted: 18 Sep 2015
Accepted: 23 Nov 2015
First published: 24 Nov 2015

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RSC Adv., 2015,5, 103428-103432

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Gram-scale synthesis of high-purity graphene quantum dots with multicolor photoluminescence

F. Liu, Y. Sun, Y. Zheng, N. Tang, M. Li, W. Zhong and Y. Du, RSC Adv., 2015, 5, 103428 DOI: 10.1039/C5RA19219F

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Gram-scale synthesis of high-purity graphene quantum dots with multicolor photoluminescence†

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