A facile electrochemical sensor designed from gold nanoparticles embedded in three-dimensional sol-gel network for concurrent detection of toxic chemicals

Maduraiveeran, Govindhan ; Ramaraj, Ramasamy (2007) A facile electrochemical sensor designed from gold nanoparticles embedded in three-dimensional sol-gel network for concurrent detection of toxic chemicals Electrochemistry Communications, 9 (8). pp. 2051-2055. ISSN 1388-2481

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.elecom.2007.05.021

Abstract

An electrochemical sensor was prepared using gold nanoparticles (Aunps) embedded in (3-aminopropyl)triethoxysilane (APS) derived silicate sol-gel three-dimensional network (APS-Aunps). The APS-Aunps modified electrode was found to efficiently electrocatalyze the oxidations of N2H4, SO32-and NO2- in the absence of any other electron transfer mediators/enzyme immobilized in the APS-Aunps modified electrode. The electrooxidation peaks appeared at 0.05, 0.2 and 0.55 V for N2H4, SO32- and NO2- in pH 7.2 at the APS-Aunps modified glassy carbon electrode (GC/APS-Aunps) with a large decrease in the over potentials to the extent of ~750 mV, ~600 mV and ~250 mV, respectively. The electrochemical sensors designed using the APS-Aunps modified electrode was also used for the concurrent detection of N2H4, SO32-and NO2- in a mixture. The electrochemical sensor prepared using APS-Aunps modified electrode was very stable and highly sensitive, and showed fast response.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Gold Nanoparticles; (3-aminopropyl)triethoxysilane Sol-gel; Modified Electrode; Concurrent Detection; Electrochemical Sensor
ID Code:88794
Deposited On:29 Mar 2012 15:13
Last Modified:29 Mar 2012 15:13

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