Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 33, 2016
Previous Article Next Article

Electrical and electrochemical properties of graphene modulated through surface functionalization

Author affiliations

Abstract

The present work emphasizes a variety of electrical and electrochemical properties of graphite nano-materials (GNMs) with respect to their extent of functionalization. GNMs are prepared by chemical exfoliation of bulk graphite, where the surface chemical structure is tuned using different reaction conditions. EDS and X-ray diffraction showed variation in oxygen to carbon ratio (O : C), which suggests that GNM samples differed in the proportion of oxygenated functionalities. Raman characterization showed a decrease in IG/ID ratio for reduced GNMs due to reduction in sp2 domain size with enhancement in overall numbers of sp2 carbons. The results are also in line with IV characteristics that manifest the linear increase in the resistivity of GNMs with increase in O : C ratio. The electrochemical response of GNMs, investigated through cyclic voltammetry, suggests that the presence of surface oxygenated functionalities of GO and SGO maintains the reversible nature of the hydroquinone redox process and also electro-catalyzes the overall process. As RGO, RSGO and CGO do not exhibit redox behavior and only show capacitive behavior, the electrochemical impedance spectroscopic results showed that these materials are highly conductive in nature, therefore do not show redox behavior.

Graphical abstract: Electrical and electrochemical properties of graphene modulated through surface functionalization

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Dec 2015, accepted on 02 Mar 2016 and first published on 15 Mar 2016


Article type: Paper
DOI: 10.1039/C5RA26533A
Citation: RSC Adv., 2016,6, 27404-27415

  •   Request permissions

    Electrical and electrochemical properties of graphene modulated through surface functionalization

    R. Jain and S. Mishra, RSC Adv., 2016, 6, 27404
    DOI: 10.1039/C5RA26533A

Search articles by author

Spotlight

Advertisements