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The deposition of nanostructured ?-PbO2 coatings from aqueous methanesulfonic acid for the electrochemical oxidation of organic pollutants

Record type: Article

Highly crystalline, nanostructured, three-dimensional ?-PbO2 coatings were successfully obtained by galvanostatic deposition from baths containing aqueous lead(II) and methanesulfonic acid (CH3SO3H). This constitutes a much more environmentally friendly methodology compared to plating of ?-PbO2 in HNO3. The deposits exhibited high quality and good adherence. The crystallite size was in the range 20–30 nm and AFM imaging revealed very uniform, rough deposits (i.e., 255–275 nm rms). The oxidative destruction of Methyl Orange azo dye was studied by electrochemical advanced oxidation processes (EAOPs). An electro-Fenton process with a high surface area carbon-felt cathode performed better than the single anodic oxidation. Rapid and complete decolorisation was achieved following pseudo first-order kinetics. The stability of the ?-PbO2 electrodes during the electrolyses was also demonstrated.

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Citation

Sirés, I., Low, C.T.J., Ponce de Leon, C. and Walsh, F.C. (2009) The deposition of nanostructured ?-PbO2 coatings from aqueous methanesulfonic acid for the electrochemical oxidation of organic pollutants Electrochemistry Communications, 12, (1), pp. 70-74. (doi:10.1016/j.elecom.2009.10.038).

More information

Published date: January 2009
Keywords: electrochemical advanced oxidation processes, electrodeposition, lead dioxide, nanostructured coatings, methanesulfonic acid, water treatment
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 69891
URI: http://eprints.soton.ac.uk/id/eprint/69891
ISSN: 1388-2481
PURE UUID: 239ee186-14dd-495a-8965-7ca98daaf83c

Catalogue record

Date deposited: 09 Dec 2009
Last modified: 19 Jul 2017 00:05

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Contributors

Author: I. Sirés
Author: C.T.J. Low
Author: F.C. Walsh

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