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


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), 70-74. (doi:10.1016/j.elecom.2009.10.038).

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Description/Abstract

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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.elecom.2009.10.038
ISSNs: 1388-2481 (print)
Keywords: electrochemical advanced oxidation processes, electrodeposition, lead dioxide, nanostructured coatings, methanesulfonic acid, water treatment
Subjects: T Technology > TD Environmental technology. Sanitary engineering
T Technology > TP Chemical technology
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 69891
Accepted Date and Publication Date:
Status
January 2009Published
Date Deposited: 09 Dec 2009
Last Modified: 31 Mar 2016 12:58
URI: http://eprints.soton.ac.uk/id/eprint/69891

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