Production of few-layer graphene structures in different modes of electrochemical exfoliation of graphite by voltage pulses

• Published in: Instrumentation science & technology Vol. 47; no. 5; pp. 535 - 544
• Main Authors: Krivenko, A. G., Manzhos, R. A., Kotkin, A. S., Kochergin, V. K., Piven, N. P., Manzhos, A. P.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 03-09-2019; Taylor & Francis Ltd
• Subjects: Electric potential; Electrochemical exfoliation; Electrochemistry; Electron paramagnetic resonance; electron paramagnetic resonance spectroscopy; Exfoliation; few-layer graphene structures; Functional groups; Graphene; Graphite; infrared spectroscopy; Organic chemistry; Oxygen; Photoelectrons; Scanning electron microscopy; solution plasma; Spectroscopy; Synthesis; Voltage; Voltage pulses; X-ray photoelectron spectroscopy
• ISSN: 1073-9149; 1525-6030
• DOI: 10.1080/10739149.2019.1607750

Physical and chemical characteristics of few-layer graphene structures (FLGS) obtained in various modes of electrochemical exfoliation of graphite have been studied. The FLGS synthesis was performed by the application of voltage pulses from a high current generator to the graphite electrodes immersed in an electrolyte solution. FLGS were characterized with scanning electron microscopy, infrared, X-ray photoelectron, and electron paramagnetic resonance spectroscopy. The suggested one-step synthesis allows a controlled variation of typical size of FLGS and the content of oxygen functional groups on the FLGS surface in the range from 7 to 26 at. %, with the highest degree of functionalization by oxygen functional groups such as OH/C-O-C and C = O achieved in the case of the anode plasma-assisted electrochemical exfoliation of graphite.