▎ 摘　　要

In this work, the kinetic modeling of methylene blue (MB) photocatalytic degradation was performed using graphene/CoZnAl-MMO/TiO2 as a new photocatalyst. First, CoZnAl-LDH/GO was synthesized. It was calcined and dispersed in dimethylformamide (DMF) and was then mixed with a dispersion of TiO2 in water, resulting in an active visible light photocatalyst with a band gap of 2.7 eV. The effect of the operating parameters such as pH, initial concentration of the dye solution, and the amount of the photocatalyst was investigated. The new kinetic model was written based on the basic photocatalytic degradation reaction equations. Finally, the model-predicted results were compared with the experimental ones. The validity of the proposed model was confirmed by the correlation coefficient (R-2 = 0.9907), the sum of squared error (SSE = 2.36 x 10(-5)), and root mean square error (RMSE = 1.086 x 10(-3)).