Induction Heating Consolidation of TiO2 Sol-Gel Coating on Stainless Steel Support for Photocatalysis Applications

Authors

  • Dreidy Vásquez
    Affiliation
    Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química, Av. Brasil 2950, Valparaíso 2340025, Chile; Tel.: +56-32-2273739
  • Oscar Jerez
    Affiliation
    Universidad de Concepción, Instituto de Geología Económica Aplicada, GEA, Concepción, Chile.
  • Rodrigo Schrebler
    Affiliation
    Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química, Av. Brasil 2950, Valparaíso 2340025, Chile; Tel.: +56-32-2273739
  • Carlos Carlesi
    Affiliation
    Pontificia Universidad Católica de Valparaíso, Escuela de Ingeniería Química, Av. Brasil 2950, Valparaíso 2340025, Chile; Tel.: +56-32-2273739
  • Danilo Carvajal
    Affiliation
    Centro de Investigación Tecnológica del Agua en el Desierto (CEITSAZA) Universidad Católica del Norte Av. Angamos 0610 Antofagasta 1270709 Chile International Organization for Dew Utilization (OPUR) 60 rue Emeriau Paris 75015 France
  • Nelson Cáceres
    Affiliation
    Pontificia Universidad Católica de Valparaíso, Facultad de Ciencias, Avda. Universidad 330, Valparaíso, Chile
  • Ricardo Schrebler
    Affiliation
    Pontificia Universidad Católica de Valparaíso, Facultad de Ciencias, Avda. Universidad 330, Valparaíso, Chile
https://doi.org/10.3311/PPch.8879

Abstract

A high-frequency induction heater was used to sinter titanium dioxide thin film on stainless steel plates with the aim of being used as photo-electrodes in wastewaters treatment. To validate the use of this sintering technique, the electrodes were prepared using sol-gel and dip-coating, followed by two different annealing processes for comparison: a conventional furnace and a high-frequency induction heating. To characterize the electrodes, X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical and photocatalysis tests were performed. Anatase and rutile phases were obtained for both annealing techniques. A more regular surface morphology was achieved via the induction heating (IH) treatment at 300 ºC. The impedance study showed a lower resistance of IH samples, representing an improvement in the charge carrier separation and its fast transfer to the surface of the electrode. The photo-oxidation of methylene blue exhibited a higher degradation compared with the conventional furnace samples prepared in this study.

Keywords:

Induction heating sintering, Electrochemical techniques, Coatings, Titanium dioxide, Photocatalysis, Azo dye

Citation data from Crossref and Scopus

Published Online

2016-05-05

How to Cite

Vásquez, D., Jerez, O., Schrebler, R., Carlesi, C., Carvajal, D., Cáceres, N. “Induction Heating Consolidation of TiO2 Sol-Gel Coating on Stainless Steel Support for Photocatalysis Applications”, Periodica Polytechnica Chemical Engineering, 60(3), pp. 141–151, 2016. https://doi.org/10.3311/PPch.8879

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Articles