Characterisation of reduced graphene oxides prepared from natural flaky, lump and amorphous graphites

Journal Article · Wed Jun 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.02.034· OSTI ID:22581561

Peng, Weijun; Li, Hongqiang; Hu, Yang; Liu, Yanyan; Song, Shaoxian

Highlights: • Natural flaky, lumpy and amorphous graphites were used to synthesis rGO. • Investigation the effect of the crystal morphology on the oxidation process of GrO and characteristics of prepared rGO. • Low graphitisation degree, big specific surface area and small lateral size were beneficial to the oxidation of graphite. - Abstract: The characterisation of reduced graphene oxides (rGOs) prepared from natural flaky, lumpy, and amorphous graphites using Hummers method was investigated. The prepared graphite oxides (GrOs) and rGOs were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, UV–vis spectroscopy, atomic force microscopy and electrochemical performance. The results showed that amorphous graphite was much easier to oxidise than lumpy and flaky graphites and was preferable for preparing single or double layer graphene because low graphitisation degree, high defect degree, high specific surface area and small crystal size were beneficial for (1) the oxidants to attack the exposed carbon atoms, (2) the intercalation of oxidants, and (3) the diffusion of oxidants between graphitic layers. In addition, rGO synthesised from amorphous graphite had the most defects and the smallest size of the in-plane sp{sup 2} domains compared to those obtained from the other two nature graphites.

• OSTI ID: 22581561
• Journal Information: Materials Research Bulletin, Vol. 78; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ATOMIC FORCE MICROSCOPY
CARBON OXIDES
CLATHRATES
COMPARATIVE EVALUATIONS
CRYSTALS
ELECTROCHEMISTRY
FOURIER TRANSFORMATION
GRAPHENE
GRAPHITE
LAYERS
MORPHOLOGY
NANOSTRUCTURES
OXIDATION
OXIDIZERS
RAMAN SPECTROSCOPY
SPECIFIC SURFACE AREA
SYNTHESIS
X-RAY DIFFRACTION