Decolorization of Methyl Orange Dye at IrO2‐SnO2‐Sb2O5 Coated Titanium Anodes |
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| Authors: | R. Chaiyont C. Badoe C. Ponce de León J. L. Nava F. J. Recio I. Sirés P. Herrasti F. C. Walsh |
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| Affiliation: | 1. Electrochemical Engineeering Laboratory, Energy Technology Research Group, University of Southampton, Southampton, UK;2. Departamento de Ingeniería Geomática e Hidráulica, Universidad de Guanajuato, Guanajuato, Mexico;3. Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química Física Aplicada, Cantoblanco, Madrid, Spain;4. Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, Barcelona, Spain |
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| Abstract: | ![]()
A film of iridium and tin dioxides doped with antimony oxide (IrO2‐SnO2‐Sb2O5) was deposited onto Ti mesh and plate substrates by the Pechini method. The electrode surface morphology and composition were characterized by SEM‐EDS. The ternary oxide coating was used for the anodic oxidation of methyl orange (MO) azo dye. Linear sweep voltammetry was used to identify the electrode potentials that favour MO degradation. Batch electrolyses were then carried out at a constant electrode potential of 1.5, 1.75 and 2.0 V vs. SHE using either a three‐electrode batch cell or a flow reactor. The dye solutions were totally decolorized via reactive oxygen species, such as ?OH, H2O2 and O3 formed in situ from water oxidation at the Ti/IrO2‐SnO2‐Sb2O5 surface. |
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| Keywords: | Dimensionally stable anodes Electrochemical degradation Methyl orange Pechini method Water treatment |
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