A green, simple and cost-effective approach to synthesize high quality graphene by electrochemical exfoliation via process optimization

作者：Chuang Chung Hsien; Su Ching Yuan; Hsu Kuei Ting; Chen Chia Hsuan; Huang Chia Hung; Chu Chi Wen; Liu Wei Ren^*

来源：RSC Advances, 2015, 5(67): 54762-54768.

DOI：10.1039/c5ra07710a

This research focuses on manufacturing graphene nanosheets (GNSs) using an electrochemical exfoliation method. Through tuning the synthetic parameters, such as the composition of electrolytes, concentration of the electrolyte, KOH/H2SO4 ratio, and applied voltage and current density, the relationships between the material's characteristics and synthetic parameters were studied. The physical and chemical properties of as-synthesized GNSs were systematically studied using scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), atomic force microscopy (AFM), Raman spectroscopy (Raman), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Among the synthetic parameters, current density plays a very important role in this exfoliation process. Under the optimal current density of 0.11 A cm(-2), we successfully synthesized high quality GNSs with a D/G ratio of 0.061, which is far superior to the reported values of other groups. The results indicate that a green, simple and cost-effective exfoliation process has been successfully developed in this study.

• 出版日期2015
• 单位中央民族大学