Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1242399 | Talanta | 2011 | 4 Pages |
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 × 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 O2 was reduced at −0.31 V with a limit of detection (LOD) equal to 7.0 × 10−4 mmol L−1. A mechanism involving four electrons in O2 reduction was determined by the rotating disk electrode technique.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Lucas S.S. Santos, Richard Landers, Yoshitaka Gushikem,