Simple and cost-effective synthesis of graphene by electrochemical exfoliation of graphite rods. Issue 4 (4th January 2016)

• Record Type: Journal Article
• Authors: Coroş, Maria; Pogăcean, Florina; Roşu, Marcela-Corina; Socaci, Crina; Borodi, Gheorghe; Mageruşan, Lidia; Biriş, Alexandru R.; Pruneanu, Stela
• Is Part Of: RSC advances. Volume 6:Issue 4(2016)
• Page Start: 2651
• Page End: 2661
• Publication Date: 2016-01-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra19277c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A simple and efficient approach for graphene production by electrochemical exfoliation of graphite rods in acidic solutions. Abstract : We report a simple and efficient approach for graphene production, by electrochemical exfoliation of graphite rods, in acidic solutions. The applied bias and electrolyte concentration were optimized. The X-ray powder diffraction (XRD) patterns of nanosheets reveal the decreasing, or even the disappearance, of the graphene oxide peak by reducing the electrochemical exfoliation bias from +6 to +2.5 V. Thus, graphene with different oxidation degrees can be obtained by controlling the applied bias. An optimal graphene sample was prepared in a mixture of H2 SO4 : HNO3 (3 : 1 ratio; 1 M each) at a bias of +3 V. The interlayer spacing, crystallite size and the average number of layers were determined by XRD. The structural and morphological characteristics of the prepared samples were also investigated by Raman Spectroscopy, FTIR Spectroscopy, X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), and Atomic Force Microscopy (AFM).