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Type: Artigo de periódico
Title: Application of manganese (II) phthalocyanine synthesized in situ in the SiO2/SnO2 mixed oxide matrix for determination of dissolved oxygen by electrochemical techniques
Author: Santos, LSS
Landers, R
Gushikem, Y
Abstract: This work describes the in situ immobilization of Mn(II) phthalocyanine (MnPc) in a porous SiO2/SnO2 mixed oxide matrix obtained by the sol gel processing method. The chemically modified matrix SiO2/SnO2/MnPc, possessing an estimated amount of 8 x 10(-10) mol cm(-2) of MnPc on the surface, was used to prepare an electrode to analyze dissolved oxygen in water by an electrochemical technique. The electrode was prepared by mixing the material with ultrapure graphite and evaluated using differential pulse voltammetry. Dissolved O-2 was reduced at -0.31 V with a limit of detection (LOD) equal to 7.0 x 10(-4) mmol L-1. A mechanism involving four electrons in O-2 reduction was determined by the rotating disk electrode technique. (C) 2011 Published by Elsevier B.V.
Subject: SiO2/SnO2
Mixed oxide
Manganese phthalocyanine
Dissolved oxygen sensor
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.talanta.2011.06.003
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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