Microstructure and photocatalytic activity of suspension plasma sprayed TiO2 coatings on steel and glass substrates

► TiO2 coatings were deposited by SPS on stainless steel and Pyrex glass. ► Large amounts of anatase were obtained in all coatings. ► A bimodal microstructure was observed, anatase is mainly found in non-molten areas. ► Coatings present high photocatalytic activity compared to commercial sol-gel layer.