Authors : Amer Muosa Juda, Douaa Raheem Hady and Ayad F. Alkaim
Abstract: This study involves the photocatalytic degradation of Carmine dye, employing heterogeneous photocatalytic process. Photocatalytic activity of different catalysts such as Zinc Oxide (ZnO) and nano ZnO has been investigated. An attempt has been made to study the effect of process parameters through amount of catalysts, concentration of dye, pH of dye solution and temperature on photocatalytic degradation of dye solutions. The optimum catalyst dose was found to be (0.75 g and 1) g\L for nano ZnO, ZnO, respectively. In the case of for nano ZnO, ZnO, maximum rate of photoreaction of dye solutions was observed in acidic medium at pH 4 for ZnO whereas the degradation of dye reached maximum at pH 2 when using nano ZnO catalyst. The performance of photocatalytic system employing nano ZnO/UV light was observed to be better than ZnO/UV system. Photocatalytic degradation was found to increase with increasing temperature. Arrhenius plot shows that the activation energy is equal to 8.07 kJ/mol-1 with ZnO and 1.2389 kJ/mol-1 with nano ZnO catalyst. The results display that the action of dissimilar kinds of catalyst used in this research is of the sequence.
Amer Muosa Juda, Douaa Raheem Hady and Ayad F. Alkaim, 2018. Comparison Activity of ZnO and ZnO Nanoparticle as Photodegradation Catalysts. Journal of Engineering and Applied Sciences, 13: 10013-10018.