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Abstract

This paper describes the application of electrophoretic deposition for air pollution removal using anatase as a photoactive coating. In this study the anatase form of TiO2 has been applied to (i) fluorine-doped tin oxide coated glass; (ii) 304L stainless steel; and (iii) titanium substrates using isopropanol and acetylacetone based solutions at 20, 40, 60 and 80V. In order to increase the strength of the substrate-anatase interface without transforming the phase into rutile, samples were calcined at 450ºC for 2 hours. The resulting coatings were characterised by Raman spectroscopy, X-ray diffraction (XRD), non-contact optical profilometry and scanning electron microscopy (SEM). The photocatalytic activity of the deposited coatings were evaluated in the gas-phase for nitrogen dioxide (NO2) removal by electron ionisation mass spectrometry whilst irradiated by light of wavelength 376-387nm for 100 minutes. Anatase phase titania supported on a fluorine-doped tin oxide coated glass substrate showed the highest photoactivity for NO2 remediation. This was attributed to the formation of a three-dimensional nanostructure with properties determined by the deposition conditions. The work provides routes for the development of low-cost and large area photoactive coatings for pollution control.
Original languageEnglish
Pages (from-to)4822-4835
Number of pages14
JournalJournal of Materials Science
Volume50
Issue number14
Early online date5 May 2015
DOIs
Publication statusPublished - 1 Jul 2015

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Keywords

  • electrophoretic deposition
  • photocatalysis
  • TiO2
  • anatase
  • NO2
  • mass quadrupole

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