Titanium dioxide has promising photocatalytic properties that can be used in the treatment and purification of air and water. The aim of this study is to determine how process parameters and oxides added to generate anastasis affect the microstructure and surface properties of plasma sprayed TiO2. The photocatalytic effect of the layers and the influence of microstructure are investigated with the help of acetaldehyde degradation. The results show that the layers produced consist of anatase (3-15%) and rutile components. It has been proven that TiO2 is capable of decomposing acetaldehyde under UV radiation in proportion to the amount of anatase present. Paper includes a German-language abstract.

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