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Nanomaterials 2018, 8(10), 844; https://doi.org/10.3390/nano8100844

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

1
College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454003, China
2
Collaborative Innovation Center of Coal Work Safety of Henan Province, Jiaozuo 454003, China
3
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
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Abstract

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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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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