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Title: Aminosilicate sol-gel embedded core-shell (TiO2-Au)nps nanomaterials modified electrode for the electrochemical detection of nitric oxide
Authors: Pandikumar, Alagarsamy
Ramaraj, Ramasamy
Keywords: Electrocatalysis;Sol-gel process;Modified electrodes;Sensors;Aminosilicate;Nitric oxide;Titania;Gold
Issue Date: Sep-2011
Publisher: NISCAIR-CSIR, India
Abstract: A glassy carbon electrode modified with amine functionalized silicate sol-gel supported core-shell titanium dioxide–gold nanocomposite materials (EDAS/(TiO2-Au)nps) has been prepared and used as an electrochemical sensor for nitric oxide detection. The aminosilicate supported core-shell nanomaterials have been synthesized by the chemical reduction of HAuCl4 and deposition of the formed Aunps on TiO2 nanoparticles in the presence of N-[3-(trimethoxysilyl)propyl]-ethylene diamine as a support matrix and as a reducing agent. The so-prepared EDAS/(TiO2-Au)nps nanomaterials and the corresponding films have been characterized by spectral and electrochemical methods. A set of experimental conditions has been optimized for the fabrication of sensor electrode. The electrochemical properties of the GC/EDAS(TiO2-Au)nps modified electrode and the electrochemical detection of NO have been  studied. The Osteryoung square wave voltammetric measurements reveals that the current response observed at the GC/EDAS(TiO2-Au)nps modified electrode for different concentrations of NO is linear with the  lowest detection limit of 1 M.
Page(s): 1388-1393
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.50A(09-10) [September-October 2011]

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