Artículos de revistas
Application of manganese (II) phthalocyanine synthesized in situ in the SiO2/SnO2 mixed oxide matrix for determination of dissolved oxygen by electrochemical techniques
Registro en:
Talanta. Elsevier Science Bv, v. 85, n. 2, n. 1213, n. 1216, 2011.
0039-9140
WOS:000293116600054
10.1016/j.talanta.2011.06.003
Autor
Santos, LSS
Landers, R
Gushikem, Y
Institución
Resumen
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) 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. 85 2 1213 1216 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)