In-situ formation of graphene-lead oxide composite and its use in trace arsenic detection

Ramesha, GK and Sampath, S (2011) In-situ formation of graphene-lead oxide composite and its use in trace arsenic detection. In: Sensors and Actuators B: Chemical, 160 (1). pp. 306-311.

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Abstract

Reduced graphene oxide-lead dioxide composite is formed when EGO coated surface is electrochemically reduced along with lead ions in the solution. This composite has been shown to be an excellent material for low level detection of arsenic. Various functional groups present on EGO, in a wide pH range of 2-11, are responsible for the favorable interaction between metal ion and the modified electrode surface and subsequent trace level detection. X-ray photoelectron spectroscopy and Raman spectroscopic techniques confirm the formation of composite and its composition. Thin layer of lead dioxide along with reduced exfoliated graphene oxide has been shown to be responsible for the enhanced activity of the surface. The detection limit of arsenic is found to be 10 nM. This study opens up the possibility of using the composites for sensing applications and possibly simultaneous detection of arsenic and lead. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Sensors and Actuators B: Chemical
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Exfoliated graphene oxide;Lead oxide;Arsenic detection; Stripping voltammetry
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	15 Feb 2012 09:31
Last Modified:	15 Feb 2012 09:31
URI:	http://eprints.iisc.ac.in/id/eprint/43444

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