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Decolorization of methyl orange dye at IrO2-SnO2-Sb2O5 coated titanium anodes

Decolorization of methyl orange dye at IrO2-SnO2-Sb2O5 coated titanium anodes
Decolorization of methyl orange dye at IrO2-SnO2-Sb2O5 coated titanium anodes
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 2.0V 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.
0930-7516
123-129
Chaiyont, R.
97cc42a9-8cac-4984-b2cb-023666485e01
Badoe, C.
d3961c00-c6ca-4c5d-8b33-5c2e751bac10
Ponce de León Albarran, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Nava, J.L.
d47b3a56-4986-444d-bbda-57ecbc03b07a
Recio, F.J.
c1569d6a-c8ca-4987-8313-01ef4c6cf776
Sirés, I.
85e095d9-c3fa-48e2-aff3-65f0f4b2e4b4
Herrasti Gonzalez, P.
4b72d0e4-f391-421a-ae54-a9ba3f5632fc
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Chaiyont, R.
97cc42a9-8cac-4984-b2cb-023666485e01
Badoe, C.
d3961c00-c6ca-4c5d-8b33-5c2e751bac10
Ponce de León Albarran, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Nava, J.L.
d47b3a56-4986-444d-bbda-57ecbc03b07a
Recio, F.J.
c1569d6a-c8ca-4987-8313-01ef4c6cf776
Sirés, I.
85e095d9-c3fa-48e2-aff3-65f0f4b2e4b4
Herrasti Gonzalez, P.
4b72d0e4-f391-421a-ae54-a9ba3f5632fc
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2

Chaiyont, R., Badoe, C., Ponce de León Albarran, Carlos, Nava, J.L., Recio, F.J., Sirés, I., Herrasti Gonzalez, P. and Walsh, F.C. (2012) Decolorization of methyl orange dye at IrO2-SnO2-Sb2O5 coated titanium anodes. Chemical Engineering & Technology, 36 (1), 123-129. (doi:10.1002/ceat.201200231).

Record type: Article

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 2.0V 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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e-pub ahead of print date: 12 December 2012
Organisations: Engineering Science Unit

Identifiers

Local EPrints ID: 348259
URI: https://eprints.soton.ac.uk/id/eprint/348259
ISSN: 0930-7516
PURE UUID: b31a9935-f72d-41a2-b7c9-7b665f32d29b
ORCID for Carlos Ponce de León Albarran: ORCID iD orcid.org/0000-0002-1907-5913

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Date deposited: 11 Feb 2013 11:39
Last modified: 06 Jun 2018 12:42

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