期刊
ELECTROCHIMICA ACTA
卷 55, 期 17, 页码 4876-4882出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.03.080
关键词
Functionalized polypyrrole; Electrocatalysis; Polymer-metal nanocomposite; Arsenic removal
资金
- ECOS-CONICYT [C07E06]
- FONDECYT [FONDECYT (Grant No 1070542]
- CIPA
- CONICYT
- Colegio Franco Chileno
Nanocomposite materials synthesized by incorporation of Pt-0 and Pd-0 nanoparticles into a poly(pyrrole-alkylammonium) matrix have been characterized by transmission electron microscopy. These nanocomposites coated onto carbon electrodes present strong electrocatalytic properties towards the oxidation of arsenite to arsenate. Nanocomposite films modified electrodes have been used for As(III) analysis, with a detection limit reaching 2.4 mu M (0.17 ppm). The interest of these nanocomposite electrode materials deposited onto carbon felt macroelectrodes for the exhaustive electrocatalytic oxidation of As(III) to As(V) solutions was also demonstrated. The use of a water-soluble poly(quaternary ammonium) salt acting both as supporting electrolyte and as extracting agent allowed us to efficiently remove the electrocatalytically generated arsenic(V) species by liquid phase polymer-assisted retention (LPR) technique. (C) 2010 Elsevier Ltd. All rights reserved.
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