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Graphene oxide; electrochemical reduction; voltage; temperature.

In this paper, the influence of temperature and voltage on direct electrochemical reduction were discussed in detail. Reduced graphene oxide is characterized with X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT–IR) and field emission scanning electron microscopy (FE–SEM). It is found that the reduction degree of graphene oxide (GO) decreases gradually with the increase of applied temperature. The optimal applied temperature found in our experiment is 20 °C; Meanwhile, as the applied voltage increases from 0.1 to 12.5 V, the reduction degree of graphene oxide increases gradually. However, above 2.5 V, increasing voltage has little effect on the reduction degree of graphene oxide.

Xiuqiang Li¹ Dong Zhang¹ Peiying Zhu¹ Chao Yang¹

1. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, College of Materials Science and Engineering, Tongji University, 4800 CaoAn Road, Shanghai 200092, China

Manuscript received

24 March 2013

Manuscript revised

7 May 2013