Photo Degradation of Direct Red 81 (5-Solamine) by Using Zinc Oxide Nanoparticles on Glass Granule Substrate in Acidic pH and Various Atmospheres

We report photocatalytic decolorization of direct red 81 (5-Solamine) in water at acidic pH and in presence of external UV light irradiation of zinc oxide (ZnO) nanparticle catalysts on granule glass as a semiconductor photocatalysts. In our study the weight of photocatalyst was constant. The photodecomposition rates have been found to be different by applying the different atmospheres through degradation process. For this purpose we used four type atmospheres: air, nitrogen, oxygen and argon. Among these atmospheres air, oxygen, nitrogen and argon respectively have the best yield. Hence, these ZnO nanoparticles would provide a new alternative route as a highly efficient photocatalyst for wastewater treatment.