Abstract
This study examines the photocatalytic activity of coatings produced by atmospheric plasma spraying (APS). The spraying tool used is a water -stabilized plasma gun WSP. The TiO2 �Fe2O 3powder withand withoutNa 2SiO3additive was agglomerated to build p articles suitable for feeding into the plasma jet and spraying. The coatings are analyzed by scanning electron microscopy, X -ray fluorescence and Xray diffraction. Photocatalytic degradation of acetone as well as the growth kinetics of the products -carbon dioxide and carbon monoxide -is quantified for both coating types and compared with a pure TiO 2 coating. The coatings show a lamellar structure, as is typical for this technological process. Howe ver the porosity is rather high. Anatase titania from the feedstock powder is converted to rutile phase whereas a presence of FeTiO 3is detected in the coating without Na 2SiO3. The coating from powder withNa 2SiO3 admixture is amorphous. Both coatings aremore photocatalytically active than the reference TiO 2coating.
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