Aminosilicate sol-gel embedded core-shell (TiO2-Au)(nps) nanomaterials modified electrode for the electrochemical detection of nitric oxide

作者：Pandikumar Alagarsamy; Ramaraj Ramasamy^*

来源：Indian Journal of Chemistry - Section A: Inorganic, Physical, Theoretical and Analytical Chemistry , 2011, 50(9-10): 1388-1393.

• Electrocatalysis
• Sol-gel process
• Modified electrodes
• Sensors
• Aminosilicate
• Nitric oxide
• Titania
• Gold

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 Au-nps 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 mu M.

• 出版日期2011-10