Photoelectrocatalytic oxidation of methyl orange on a tio2 nanotubular anode using a flow cell

Photoelectrocatalytic oxidation of methyl orange on a tio2 nanotubular anode using a flow cell

Author Jose Martin de Vidales, Maria Google Scholar
Mais, Laura Google Scholar
Saez, Cristina Google Scholar
Canizares, Pablo Google Scholar
Walsh, Frank C. Google Scholar
Rodrigo, Manuel A. Google Scholar
Rodrigues, Christiane de Arruda Autor UNIFESP Google Scholar
de Leon, Carlos Ponce Google Scholar
Abstract Methyl orange from water was removed by photocatalytic anodic oxidation using a titanium dioxide array surface. The coating was prepared by anodizing a titanium plate in an ethylene glycol electrolyte-containing NH4F followed by heat treatment to realize a photocatalytic surface under UV light. Scanning electron microscopy imaging showed that the array coating consisted of closely spaced nanotubes perpendicular to the titanium plate. The aqueous solution of methyl orange was circulated through a rectangular channel flow cell containing the coated anode. The effects of electrolyte flow rate and applied potential on the oxidation rate and efficiency were evaluated. At higher mean linear flow rates, the efficiency of the oxidation process improved, indicating a mass transport-controlled process. At more positive applied potentials, the TiO2 structure deteriorated resulting in a lower oxidation efficiency.
Keywords Flow Cell
Methyl Orange
Photoelectrocatalytic Oxidation
Tio2 Nanotubes
WastewaterBoron-Doped Diamond
Electrochemical Oxidation
Waste-Water
Degradation
Removal
Arrays
Dye
Acid
Electrolysis
Wastewaters
Language English
Sponsor National Spanish Ministry of Economy and Competition [CTM2010-18833/TECNO]
Formacion de Profesorado Universitario grant (Spanish Government)
CYTEMA-Puente grant (University of Castilla-La Mancha)
Sao Paulo Research foundation (FAPESP) [2011/51226-3]
Federal University of Sao Paulo (UNIFESP) from the Brazilian Government
University of Southampton
Grant number National Spanish Ministry of Economy and Competition: Project CTM2010-18833/TECNO
FAPESP: 2011/51226-3
Date 2016
Published in Chemical Engineering & Technology. Weinheim, v. 39, n. 1 SI, p. 135-141, 2016.
ISSN 0930-7516 (Sherpa/Romeo, impact factor)
Publisher Wiley-v c h verlag gmbh
Extent 135-141
Origin https://doi.org/10.1002/ceat.201500085
Access rights Closed access
Type Article
Web of Science ID WOS:000368035100014
URI http://repositorio.unifesp.br/handle/11600/49654

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