ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Preparation and physicochemical and electrochemical characterization of exfoliated graphite oxide

Ramesh, P and Bhagyalakshmi, S and Sampath, S (2004) Preparation and physicochemical and electrochemical characterization of exfoliated graphite oxide. In: Journal of Colloid and Interface Science, 274 (1). pp. 95-102.

[img] PDF
Preparation-428-pdf.pdf
Restricted to Registered users only

Download (291Kb) | Request a copy

Abstract

Exfoliated graphite oxide (EGO) is prepared by oxidizing exfoliated graphite (EG) using a mixture of $KMnO_4/H_2SO_4.$ The physicochemical characterization of the EGO has been carried out using FT-Raman, FT-IR, XPS, NMR, and diffraction techniques. Colloidal form of EGO is subsequently prepared by ultrasonicating EGO in water. Thin films of EGO on a glassy carbon/gold surface are formed and the electrochemical and ion exchange properties have been studied using various redox systems such as $K_4[Fe(CN)_6],$ ascorbic acid, and dopamine. The charge-based adsorption properties can be made use of, to either suppress or catalyze ascorbic acid oxidation. Adsorption and preconcentration of dopamine on the EGO film has been shown to electrocatalyze the oxidation of NADH.

Item Type: Journal Article
Additional Information: The copyright belongs to Elsevier.
Keywords: Exfoliated graphite oxide;Colloid;Ion exchange;Adsorption;Electroanalysis;Modified electrode and electrostatic assembly
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 11 May 2006
Last Modified: 19 Sep 2010 04:26
URI: http://eprints.iisc.ernet.in/id/eprint/6666

Actions (login required)

View Item View Item