Silver nanoparticles embedded three dimensional silicate sol-gel matrix modified electrode for nitrite sensor application

Maduraiveeran, Govindhan ; Manivasakan, Palanisamy ; Ramaraj, Ramasamy (2011) Silver nanoparticles embedded three dimensional silicate sol-gel matrix modified electrode for nitrite sensor application International Journal of Nanotechnology, 8 (10-12). pp. 925-934. ISSN 1475-7435

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Official URL: http://www.inderscience.com/search/index.php?actio...

Related URL: http://dx.doi.org/10.1504/IJNT.2011.044437

Abstract

A simple amperometric sensor was fabricated by using silver nanoparticles (Agnps) embedded three dimensional silicate sol-gel (SG) matrix (SG-Agnps). The silver nanoparticles stabilised by SH functionalised 3-D silicate sol-gel network was coated on the glassy carbon electrode and used for the determination of nitrite ion in 0.1 M PBS (pH 7.2). The prepared silver nanoparticles-silicate sol-gel (SG-Agnps) modified electrode was characterised by UV-visible absorption spectroscopy, scanning electron microscopy (SEM) and electrochemical method. The electrochemical behaviour of SG-Agnps modified electrode was studied by using potassium ferricyanide as a redox marker to probe the tunable kinetic barrier of the dispersed silver nanoparticles in silicate sol-gel matrix. The SG-Agnps film was used as nanomaterials comprised electrochemical device for direct electrocatalysis and amperometric sensing of nitrite ion. The silver nanoparticles embedded silicate sol-gel film showed good stability and sensitivity with an experimental amperometric detection limit of 4 M. The fabrication of SG-Agnps modified electrode was very simple and it showed fast amperometric response and reproducible results for nitrite sensing.

Item Type:Article
Source:Copyright of this article belongs to Inderscience Publishers.
Keywords:Silver Nanoparticles; Silicate Sol-gel; Modified Electrodes; Amperometric Sensing; Nitrite Detection; Nitrite Sensors; Nanotechnology; Nanomaterials; Electrocatalysis
ID Code:88799
Deposited On:29 Mar 2012 15:13
Last Modified:29 Mar 2012 15:13

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