Jump to main content
Jump to site search

Issue 37, 2012
Previous Article Next Article

Influence of parent graphite particle size on the electrochemistry of thermally reduced graphene oxide

Author affiliations

Abstract

Electrochemical applications of graphene are of very high importance. For electrochemistry, bulk quantities of materials are needed. The most common preparation of bulk quantities of graphene materials is based on oxidation of graphite to graphite oxide and subsequent thermal exfoliation of graphite oxide to thermally reduced graphene oxide (TR-GO). It is important to investigate to which extent a reaction condition, that is, composition of the oxidation mixture and size of graphite materials, influences the properties of the resulting materials. We characterised six graphite materials with a range of particle sizes (0.05, 11, 20, 32, 35 and 41 μm) and the TR-GO products prepared from them by use of scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. Cyclic voltammetric performance of the TR-GO samples was compared using ferro/ferricyanide and ascorbic acid. We observed no correlation between size of initial graphite and properties of the resultant TR-GO such as density of surface defects, amount of oxygen-containing groups, or rate of heterogeneous electron transfer (HET). A positive correspondence between HET rate and high defect density as well as low amounts of oxygen functionalities was noted. Our findings will have profound influence upon practical fabrication of graphene for applications in sensing and energy storage devices.

Graphical abstract: Influence of parent graphite particle size on the electrochemistry of thermally reduced graphene oxide

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 May 2012, accepted on 19 Jul 2012 and first published on 08 Aug 2012


Article type: Paper
DOI: 10.1039/C2CP41462G
Citation: Phys. Chem. Chem. Phys., 2012,14, 12794-12799
  •   Request permissions

    Influence of parent graphite particle size on the electrochemistry of thermally reduced graphene oxide

    S. Y. Chee, H. L. Poh, C. K. Chua, F. Šaněk, Z. Sofer and M. Pumera, Phys. Chem. Chem. Phys., 2012, 14, 12794
    DOI: 10.1039/C2CP41462G

Search articles by author

Spotlight

Advertisements