Jump to main content
Jump to site search

Issue 2, 2010
Previous Article Next Article

Photo-electrochemical sensor for dissolved oxygen, based on a poly(3,4-ethylenedioxythiophene)/iron oxalate hybrid electrode

Author affiliations

Abstract

In this work a poly(3,4-ethylenedioxythiophene) (PEDOT)/iron oxalate composite was synthesized by electrochemical polymerization. The layer was deposited potentiostatically from the monomer-containing solution in the presence of iron(II) oxalate. Similarly to the polypyrrole/iron oxalate electrode – presented in a recent paper – the layer gave a negative photocurrent, which depended on the oxygen concentration of the electrolyte. This cathodic photocurrent – taken as the differences between the values registered under illumination and in the dark at −750 mV potential on the cathodic part of the voltammetric cycles – confirmed the sensitivity of the PEDOT/iron oxalate electrode for dissolved oxygen. Stationary photocurrents were determined also from chronoamperometric measurements, and they exhibited a linear behaviour with the dissolved oxygen concentration to below 1 ppm. The photo-effect of the PEDOT/iron oxalate layer can be attributed to the excitation of the neutral form of the film.

Graphical abstract: Photo-electrochemical sensor for dissolved oxygen, based on a poly(3,4-ethylenedioxythiophene)/iron oxalate hybrid electrode

Back to tab navigation

Article information


Submitted
22 Jun 2009
Accepted
26 Nov 2009
First published
08 Dec 2009

Analyst, 2010,135, 375-380
Article type
Paper

Photo-electrochemical sensor for dissolved oxygen, based on a poly(3,4-ethylenedioxythiophene)/iron oxalate hybrid electrode

G. Bencsik, Z. Lukács and C. Visy, Analyst, 2010, 135, 375
DOI: 10.1039/B912152H

Social activity

Search articles by author

Spotlight

Advertisements