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Photoelectrocatalytic oxidation of methyl orange on TiO2 nanotubular anode using a flow-cell

Photoelectrocatalytic oxidation of methyl orange on TiO2 nanotubular anode using a flow-cell
Photoelectrocatalytic oxidation of methyl orange on TiO2 nanotubular anode using a flow-cell
Methyl orange from water was removed by photocatalytic anodic oxidation method using a titanium dioxide array surface. The coating was prepared by anodising a titanium plate using NH4F as electrolyte followed by heat treatment to render a photocatalytic surface under UV light. SEM imaging showed that the array coating consisted of closely spaced 1 micro?m long, 0.1 mico?m internal diameter tubes perpendicular to the titanium plate. The aqueous solution of methyl orange was circulated through a rectangular channel flow cell containing the coated anode and the effect 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 resulted in lower oxidation efficiency
flow cell, methyl orange, photoelectrocatalytic oxidation, TiO2 nanotubes, wastewater
0930-7516
1-18
Martín de Vidales, María José
1b069015-e18a-414d-9387-797df0c47528
Mais, Laura
a4d3c218-b6dc-4455-9522-214464defebe
Sáez, Cristina
a68629c7-e556-4743-aa7a-e3b115b54898
Cañizares, Pablo
586ce278-f529-43b3-a9d0-ffef7b94dbe1
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Rodrigo, Manuel A.
60f5b735-d515-487e-b3b1-19f0e6f85002
Arruda Rodrigues, Christiane
7d336be7-6dec-4fc5-8fcf-3eae0bb73631
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Martín de Vidales, María José
1b069015-e18a-414d-9387-797df0c47528
Mais, Laura
a4d3c218-b6dc-4455-9522-214464defebe
Sáez, Cristina
a68629c7-e556-4743-aa7a-e3b115b54898
Cañizares, Pablo
586ce278-f529-43b3-a9d0-ffef7b94dbe1
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Rodrigo, Manuel A.
60f5b735-d515-487e-b3b1-19f0e6f85002
Arruda Rodrigues, Christiane
7d336be7-6dec-4fc5-8fcf-3eae0bb73631
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c

Martín de Vidales, María José, Mais, Laura, Sáez, Cristina, Cañizares, Pablo, Walsh, F.C., Rodrigo, Manuel A., Arruda Rodrigues, Christiane and Ponce de León, C. (2015) Photoelectrocatalytic oxidation of methyl orange on TiO2 nanotubular anode using a flow-cell. Chemical Engineering & Technology, 1-18. (doi:10.1002/ceat.201500085).

Record type: Article

Abstract

Methyl orange from water was removed by photocatalytic anodic oxidation method using a titanium dioxide array surface. The coating was prepared by anodising a titanium plate using NH4F as electrolyte followed by heat treatment to render a photocatalytic surface under UV light. SEM imaging showed that the array coating consisted of closely spaced 1 micro?m long, 0.1 mico?m internal diameter tubes perpendicular to the titanium plate. The aqueous solution of methyl orange was circulated through a rectangular channel flow cell containing the coated anode and the effect 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 resulted in lower oxidation efficiency

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e-pub ahead of print date: 3 July 2015
Keywords: flow cell, methyl orange, photoelectrocatalytic oxidation, TiO2 nanotubes, wastewater
Organisations: Energy Technology Group

Identifiers

Local EPrints ID: 380671
URI: http://eprints.soton.ac.uk/id/eprint/380671
ISSN: 0930-7516
PURE UUID: ce5964af-9e56-45e3-aead-7078297b7d87
ORCID for C. Ponce de León: ORCID iD orcid.org/0000-0002-1907-5913

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Date deposited: 14 Sep 2015 10:22
Last modified: 17 Dec 2019 01:46

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