Issue 26, 2012

Facile synthesis of well-dispersed graphene by γ-ray induced reduction of graphene oxide

Abstract

We demonstrate a facile and environmentally friendly approach to prepare well-dispersed graphene sheets by γ-ray induced reduction of a graphene oxide (GO) suspension in N,N-dimethyl formamide (DMF) at room temperature. GO is reduced by the electrons generated from the radiolysis of DMF under γ-ray irradiation. The reduced GO by γ-ray irradiation (G-RGO) can be re-dispersed in many organic solvents, and the resulting suspensions are stable for two weeks due to the stabilization of N(CH3)2+ groups on G-RGO. Additionally, G-RGO is efficient in improving the conductivity of polystyrene (PS). Its PS nanocomposites exhibit a sharp transition from electrically insulating to conducting with a low percolation threshold of 0.24 vol% and a high electrical conductivity of 45 S m−1 is obtained with only 2.3 vol% of G-RGO. The superior electrical conductivity is attributed to the uniform dispersion of the G-RGO sheets in the PS matrix.

Graphical abstract: Facile synthesis of well-dispersed graphene by γ-ray induced reduction of graphene oxide

Supplementary files

Article information

Article type
Paper
Submitted
10 Apr 2012
Accepted
10 May 2012
First published
10 May 2012

J. Mater. Chem., 2012,22, 13064-13069

Facile synthesis of well-dispersed graphene by γ-ray induced reduction of graphene oxide

Y. Zhang, H. Ma, Q. Zhang, J. Peng, J. Li, M. Zhai and Z. Yu, J. Mater. Chem., 2012, 22, 13064 DOI: 10.1039/C2JM32231E

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