Deposition and characterisation of TiO 2 coatings on various supports for structured (photo)catalytic reactors

Different types of aqueous TiO 2–P25 suspensions were prepared and their properties were studied. Then, TiO 2 suspensions were used to elaborate TiO 2 coatings on various substrates (cordierite monolith, stainless steel plates and β -SiC foam) using a dip-coating method. Finally, the photocatalytic properties of the materials have been determined by studying the photooxidation of aqueous ammonia. Different types of aqueous TiO 2–P25 suspensions were prepared and their properties, including rheological behaviour and zeta potential, were studied. Then, TiO 2 suspensions were used to elaborate TiO 2 coatings on various substrates (cordierite monolith, stainless steel plates and β -SiC foam) using a dip-coating method. The relationship between the suspension stability and the coating adhesion has been considered. The structural and morphological characterisation of TiO 2 coatings has been performed using scanning electron microscopy, X-ray diffraction and other methods. Finally, the photocatalytic properties of the materials have been determined by studying the photooxidation of aqueous ammonia.