Paper Title:
Environmental Applications of the Reactive Titania Coatings Elaborated by Suspension Plasma Spraying
  Abstract

This paper deals with the elaboration of titanium dioxide coatings, designed for photocatalytic applications, obtained by a non-conventional method of deposition: suspension plasma spraying (SPS). SPS is an alternative of the atmospheric plasma spraying (APS) in which the feedstock material is a suspension of the powder to be sprayed. The method consists in injection and atomization of a slurry (suspension of fine particles in a solvent) in an enthalpic source (plasma). TiO2 P25 powder (Degussa AG) was mechanically dispersed in distilled water and ethanol and injected in Ar-H2 or Ar-H2-He plasma under atmospheric conditions. SEM and XRD were performed to study the microstructure and the crystalline phases of the titania coatings. Photocatalytic efficiency of the elaborated samples was evaluated from the conversion rate of nitrogen oxides. The present results showed that the suspension plasma spraying allows to produce reactive surfaces for the removal of air pollutants, that in the same working conditions, present a higher photocatalytic activity compared to that of the initial raw powders.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
2182-2187
DOI
10.4028/www.scientific.net/AST.45.2182
Citation
F. L. Toma, G. Bertrand, C. Meunier, S. Begin, D. Klein, C. Coddet, "Environmental Applications of the Reactive Titania Coatings Elaborated by Suspension Plasma Spraying", Advances in Science and Technology, Vol. 45, pp. 2182-2187, 2006
Online since
October 2006
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