The photocatalysis has found many applications in the environmental field; it has first been developed for the
treatment of water where many studies have demonstrated the effectiveness of the method on the families of very
different organic compounds such as saturated or unsaturated hydrocarbons, oxygenated compounds, pesticides,
dyes, aliphatic acids, surfactants and various aromatic compounds. It is also used for the air cleaning, the recovery of
metals and more recently, obtaining self-cleaning materials such as glazed surfaces [4]. The most part of the work
was carried out at the laboratory and pilot reactors.