Fabrication of ZnO thin film by dip-coating technique and study of photocatalytic activity in Rhodamine B degradation reaction

Abstract

In this study, ZnO thin films were fabricated by dip-coating technique used solution synthesized by sol-gel method. The influence of film area and RhB concentration on the photocatalytic activity of ZnO films was determined. Accordingly, the survey results irradiation with a UV lamp 5W showed that both the efficiency and the rate constant increased when the film’s area used increased, but the mass of RhB decomposed in 1 hour calculated according to 1 m2 films again decreased. In the case of increased RhB concentration, the results show that the efficiency and the reaction rate constant decrease in value. Finally, an important point to mention is the film samples can be reused many times showing high potential for practical applications.