NaY zeolite and TiO2 impregnated NaY zeolite for the adsorption and photocatalytic degradation of Methylene blue under Sunlight

Abstract

NaY zeolite was impregnated by TiO2 to prepare novel catalyst for the adsorption and photocatalytic degradation of methylene blue (MB). The samples were characterized by XRD, SEM, EDS and FTIR techniques. The percentage adsorption of MB on NaY reaches 88% and adsorption capacity of 6.55 mg/g under optimized parameters ([MB] = 10 mg/L, pH = 6, S/L = 2 mg/L and T = 25°C). The MB adsorption process follows Langmuir isotherm. The thermodynamic parameters were investigated and showed an endothermic and physical process. The MB adsorption also follows a pseudo second-order kinetic. The photo-degradation of the MB dye was successfully carried out on the TiO2/NaY catalyst under sunlight. The MB photo-degradation also follows a Langmuir-Hinshelwood first-order kinetic.