Utilisation de divers semi-conducteurs pour la dégradation photocatalytique en milieu hétérogène d'un colorant textiles

Abstract

This study concerns the application of photocatalysis in the treatment of a water polluted by textile azoic dye: the cybacron brilliant yellow 3G-P. The particularity of this process holds in the generation in the medium of very reactive and very oxidizing entity: hydroxyl radicals OH^?. These radicals are able to oxidize any organic molecule up to the ultimate stage of oxidation. Three various catalysts are tested: two varieties of titanium dioxide (anatase and P-25 Degussa) and a zinc oxide. Degradation tests are led in a mechanically stirred reactor in which the catalyst is maintained in suspension