nay zeolite and tio2 impregnated nay zeolite for the adsorption and photocatalytic degradation of methylene blue under sunlight

Nay zeolite was impregnated by tio2 to prepare a novel catalyst for the adsorption and photocatalytic degradation of methylene blue (mb). the samples were characterized by xrd, sem, eds, and ft-ir techniques. the percentage adsorption of mb on nay reaches 88% and an 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.