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Nanomaterials 2018, 8(10), 844;

Green Preparation of High Yield Fluorescent Graphene Quantum Dots from Coal-Tar-Pitch by Mild Oxidation

College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
Collaborative Innovation Center of Coal Work Safety of Henan Province, Jiaozuo 454003, China
Henan Key Laboratory of Coal Green Conversion, Jiaozuo 454003, China
Authors to whom correspondence should be addressed.
Received: 15 September 2018 / Revised: 12 October 2018 / Accepted: 13 October 2018 / Published: 17 October 2018
PDF [3170 KB, uploaded 17 October 2018]


Coal tar pitch (CTP), a by-product of coking industry, has a unique molecule structure comprising an aromatic nucleus and several side chains bonding on this graphene-like nucleus, which is very similar to the structure of graphene quantum dots (GQDs). Based on this perception, we develop a facile approach to convert CTP to GQDs only by oxidation with hydrogen peroxide under mild conditions. One to three graphene layers, monodisperse GQDs with a narrow size distribution of 1.7 ± 0.4 nm, are obtained at high yield (more than 80 wt. %) from CTP. The as-produced GQDs are highly soluble and strongly fluorescent in aqueous solution. This simple strategy provides a feasible route towards the commercial synthesis of GQDs for its cheap material source, green reagent, mild condition, and high yield. View Full-Text
Keywords: graphene quantum dots; coal tar pitch; luminescence; green graphene quantum dots; coal tar pitch; luminescence; green

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liu, Q.; Zhang, J.; He, H.; Huang, G.; Xing, B.; Jia, J.; Zhang, C. Green Preparation of High Yield Fluorescent Graphene Quantum Dots from Coal-Tar-Pitch by Mild Oxidation. Nanomaterials 2018, 8, 844.

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