Degradasi Zat Warna Methylene Blue dengan Katalis ZnO-CuO Menggunakan Metode Fotosonolisis

Abstract

Photosonolysis method has been investigate to degrade the Methylene blue in a sample solution using the catalyst of ZnO doped by variying concentrations of CuO. The purpose of the investigation is to determine the effects of radiation time and CuO concentrations used for ZnO doping. The UV-DRS was used to calculate the band gap of ZnO doped while UV-Vis spectrophotometer was used to calculate the absorbance of Methylene blue concentration before and after degradation processes. The results show band gap of ZnO doped was 3.30 eV. The highest percentage of Methylene blue degraded was 87,95% at room temperature for 120 minutes using ZnO undope. The number of Methylene blue degraded increased up to 90,33 % when ZnO doped by 20% of CuO.