Mechanism of a green graphene oxide reduction with reusable potassium carbonate

He, Dongning, Peng, Zheng, Gong, Wei, Luo, Yongyue, Zhao, Pengfei and Kong, Lingxue 2015, Mechanism of a green graphene oxide reduction with reusable potassium carbonate, RSC advances, vol. 5, no. 16, pp. 11966-11972, doi: 10.1039/c4ra14511a.

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Title Mechanism of a green graphene oxide reduction with reusable potassium carbonate
Author(s) He, Dongning
Peng, Zheng
Gong, Wei
Luo, Yongyue
Zhao, Pengfei
Kong, LingxueORCID iD for Kong, Lingxue
Journal name RSC advances
Volume number 5
Issue number 16
Start page 11966
End page 11972
Total pages 7
Publisher Royal Society of Chemistry
Place of publication Cambridge, Eng.
Publication date 2015
ISSN 2046-2069
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Summary  A green method for the deoxygenation of graphene oxide (GO) was developed using K2CO3 as a reusable reduction agent. The size and thickness of the reduced GO are less than 1 μm and around 0.85 nm, respectively. Carbon dioxide is the only byproduct during this process. The reduction mechanism of the graphene oxide includes two reduction steps. On the one hand, ionic oxygen generated from the electrochemical reaction between hydroxyl ions and oxygen in the presence of K2CO3 reacts with carbonyl groups attached to the GO layers at 50°C. On the other hand, ionic oxygen attacks hydroxyl and epoxide groups, which become carbonyl groups and then are converted to carbon dioxide by K2CO3 at 90°C. These oxygenous groups are finally converted to CO2 from graphene layers, leading to the formation of graphene sheets. Headspace solid-phase microextraction and gas chromatography-mass spectrometry detected the existence of n-dodecanal and 4-ethylbenzoic acid cyclopentyl ester during the reduction, suggesting that oxygen functional groups on the GO layers are not only aligned, but randomly dispersed in some areas based on the proposed mechanism.
Language eng
DOI 10.1039/c4ra14511a
Field of Research 030302 Nanochemistry and Supramolecular Chemistry
030304 Physical Chemistry of Materials
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, Royal Society of Chemistry
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