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Type: Artigo de periódico
Title: Synthesis, characterization and electroanalytical application of a new SiO2/SnO2 carbon ceramic electrode
Author: Arguello, J
Magosso, HA
Landers, R
Pimentel, VL
Gushikem, Y
Abstract: A new SiO2/SnO2 carbon ceramic composite was prepared by the sol-gel method, and its potential application in electrochemistry as a novel electrode material has been studied. The prepared xerogel was structurally and electrochemically characterized by scanning electron microscopy coupled to energy dispersive spectroscopy, X-ray photoelectron spectroscopy. X-ray diffraction and cyclic voltammetry. The composite was pressed in a rigid disk-shape and used as a conductive substrate to immobilize a water-soluble organic-inorganic hybrid polymer, 3-n-propyl-4-picolinium chloride silsesquioxane. The oxidation of nitrite was studied on this polymer film coated electrode in aqueous solution using cyclic voltammetry and differential pulse voltammetry. This modified electrode exhibited a better defined voltammetric peak shifted negatively about 60 mV. The linear detection limit found for nitrite was from 1.3 x 10(-5) to 1.3 x 10(-3) moll(-1) and the detection limit was 3.3 x 10(-6) moll(-1). (C) 2010 Elsevier Ltd. All rights reserved.
Subject: Carbon ceramic composite
Nitrite electrooxidation
3-n-Propyl-4-picolinium chloride silsesquioxane
Country: Inglaterra
Editor: Pergamon-elsevier Science Ltd
Citation: Electrochimica Acta. Pergamon-elsevier Science Ltd, v. 56, n. 1, n. 340, n. 345, 2010.
Rights: fechado
Identifier DOI: 10.1016/j.electacta.2010.08.073
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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