Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/95873
Title: Thermally reduced graphenes exhibiting a close relationship to amorphous carbon
Authors: Wong, Colin Hong An
Ambrosi, Adriano
Pumera, Martin
Keywords: DRNTU::Engineering::Materials::Nanostructured materials
Issue Date: 2012
Source: Wong, C. H. A., Ambrosi, A., & Pumera, M. (2012). Thermally Reduced Graphenes Exhibiting a Close Relationship to Amorphous Carbon. Nanoscale, 4(16), 4972-4977.
Series/Report no.: Nanoscale
Abstract: Graphene is an important material for sensing and energy storage applications. Since the vast majority of sensing and energy storage chemical and electrochemical systems require bulk quantities of graphene, thermally reduced graphene oxide (TRGO) is commonly employed instead of pristine graphene. The sp2 planar structure of TRGO is heavily damaged, consisting of a very short sp2 crystallite size of nanometre length and with areas of sp3 hybridized carbon. Such a structure of TRGO is reminiscent of the key characteristic of the structure of amorphous carbon, which is defined as a material without long-range crystalline order consisting of both sp2 and sp3 hybridized carbons. Herein, we describe the characterization of TRGO, its parent graphite material and carbon black (a form of amorphous carbon) via transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry experiments. We used the data obtained as well as consideration of practical factors to perform a comparative assessment of the relative electrochemical performances of TRGO against amorphous carbon. We found out that TRGO and amorphous carbon exhibit almost identical characteristics in terms of density of defects in the sp2 lattice and a similar crystallite size as determined by Raman spectroscopy. These two materials also exhibit similar amounts of oxygen containing groups as determined by XPS and nearly indistinguishable cyclic voltammetric response providing almost identical heterogeneous electron transfer constants. This leads us to conclude that for some sensing and energy storage electrochemical applications, the use of amorphous carbon might be a much more economical solution than the one requiring digestion of highly crystalline graphite with strong oxidants to graphite oxide and then thermally exfoliating it to thermally reduced graphene oxide.
URI: https://hdl.handle.net/10356/95873
http://hdl.handle.net/10220/10045
DOI: 10.1039/C2NR30989K
Rights: © 2012 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1039/C2NR30989K].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
Thermally Reduced Graphenes Exhibiting a Close Relationship to Amorphous Carbon.pdf538.85 kBAdobe PDFThumbnail
View/Open

SCOPUSTM   
Citations 5

57
Updated on Sep 2, 2020

PublonsTM
Citations 5

55
Updated on Mar 6, 2021

Page view(s) 20

473
Updated on Apr 16, 2021

Download(s) 10

334
Updated on Apr 16, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.