Graphene–platinum Nanocomposite as a Sensitive and Selective Voltammetric Sensor for Trace Level Arsenic Quantification

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Kempegowda, R. and Antony, D. and Malingappa, P. (2014) Graphene–platinum Nanocomposite as a Sensitive and Selective Voltammetric Sensor for Trace Level Arsenic Quantification. International Journal of Smart and Nano Materials, 5 (1). pp. 17-32. ISSN 1947-542X

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Official URL: http://dxdoi.org/10.1080/19475411.2014.898710

Abstract

A simple protocol for the chemical modification of graphene with platinum nanoparticles and its subsequent electroanalytical application toward sensitive and selective determination of arsenic has been described. Chemical modification was carried out by the simultaneous and sequential chemical reduction of graphene oxide and hexachloroplatinic acid in the presence of ethylene glycol as a mild reducing agent. The synthesized graphene–platinum nanocomposite (Gr–nPt) has been characterized through infrared spectroscopy, x-ray diffraction study, field emission scanning electron microscopy and cyclic voltammetry (CV) techniques. CV and square-wave anodic stripping voltammetry have been used to quantify arsenic. The proposed nanostructure showed linearity in the concentration range 10–100 nM with a detection limit of 1.1 nM. The proposed sensor has been successfully applied to measure trace levels of arsenic present in natural sample matrices like borewell water, polluted lake water, agricultural soil, tomato and spinach leaves.

Item Type: Article
Uncontrolled Keywords: Arsenic; Graphene–; Platinum Nanocomposite; Chemical Modification; Square-Wave Anodic Stripping Voltammetry; Spinach Leaves
Subjects: Faculty of Science > Pure Sciences > Chemistry
Divisions: Jnana Bharathi / Central College Campus > Department of Chemistry
Depositing User: Ms. Rekha Jadhav
Date Deposited: 08 Aug 2016 06:20
Last Modified: 08 Aug 2016 06:20
URI: http://eprints-bangaloreuniversity.in/id/eprint/4308

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