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

摘要

A glassy carbon electrode modified withamine functionalized silicate sol-gel supported core-shell titaniumdioxide–gold nanocomposite materials (EDAS/(TiO2-Au)nps) hasbeen prepared and used as an electrochemical sensor for nitric oxide detection.The aminosilicate supported core-shell nanomaterials have been synthesized by thechemical reduction of HAuCl4 and deposition of the formed Aunpson TiO2 nanoparticles in the presence of N-[3-(trimethoxysilyl)propyl]-ethylenediamine as a support matrix and as a reducing agent. The so-prepared EDAS/(TiO2-Au)npsnanomaterials and the corresponding films have been characterized by spectraland electrochemical methods. A set of experimental conditions has been optimizedfor the fabrication of sensor electrode. The electrochemical properties of the GC/EDAS(TiO2-Au)npsmodified electrode and the electrochemical detection of NO have been? studied. The Osteryoung square wavevoltammetric measurements reveals that the current response observed at the GC/EDAS(TiO2-Au)npsmodified electrode for different concentrations of NO is linear with the? lowest detection limit of 1 M.