Photocatalytic activity of TiO-P@n-TiO@HAP composite films for air depollution.

We report on an elaboration of new composite photocatalysts (TiO-P@ n-TiO@HAP) based on grafted size-selected 5-nm titanium-oxo-alkoxo nanoparticles on P25-TiO nanoparticles and HAP obtained by co-precipitation of salts. The 5-nm oxo-TiO particles were prepared in a sol-gel reactor with rapid reagents micromixing. The photocatalytic test of ethylene degradation, in a continuous-flow fixed-bed reactor, showed an increase of the photocatalytic yield for the composite photocatalysts with an addition of HAP.