Electrical Conductivity of Alkaline-reduced Graphene Oxide

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (5): 857-861.

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Electrical Conductivity of Alkaline-reduced Graphene Oxide

WANG Huan¹, TIAN Hong-wei¹, WANG Xin-wei¹, QIAO Liang¹, WANG Shu-min¹, WANG Xing-li¹, ZHENG Wei-tao^1* and LIU Yi-chun²

1. Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science, Jilin University, Changchun 130012, P. R. China;
2. Key Laboratory for UV-Emitting Materials and Technology, Ministry of Education, Center for Advanced Optoelectronic Functional Materials Research, Northeast Normal University, Changchun 130024, P. R. China

Received:2011-04-06 Revised:2011-05-01 Online:2011-09-25 Published:2011-09-06
Contact: ZHENG Wei-tao E-mail:wtzheng@jlu.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.50525204, 50832001), the Special PhD Program of Ministry of Education, China(No.200801830025), the Program for Changjiang Scholars and Innovative Research Team in University of China and the “211” and “985” Project of Jilin University, China.

Abstract

Abstract: A green route using a very simple and straightforward ultrasonic process under alkaline conditions, rather than a general chemical reduction process using hydrazine, was utilized to obtain the hydrophilic reduced graphene oxide(RGO) sheets, via removing oxygen functional groups from graphene oxide(GO) and repairing the aromatic structure. It is found that the conductivity of the obtained RGO could be tuned by changing pH value in alkaline solution, and the current-voltage(I-V) curves of both GO and RGO are nonlinear and slightly asymmetric. Under the same applied voltage, the current of RGO is much larger than that of GO, indicating a pronounced increase in the electrical conductivity of RGO, compared to that of GO.

Key words: Graphene, Reduction, Conductivity

WANG Huan, TIAN Hong-wei, WANG Xin-wei, QIAO Liang, WANG Shu-min, WANG Xing-li, ZHENG Wei-tao* and LIU Yi-chun. Electrical Conductivity of Alkaline-reduced Graphene Oxide[J]. Chemical Research in Chinese Universities, 2011, 27(5): 857-861.

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Electrical Conductivity of Alkaline-reduced Graphene Oxide

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