Semiconductor photocatalysis has proved to be an efficient method for decolorization and degradation of pollutants. The potential of the prepared photocatalyst in degradation of methylene blue (MB) dye under sunlight irradiation was studied. Characterization of LaMnO3 nanorods of prepared sample was studied using X-ray powder diffraction (XRD), TG/DTA, SEM, TEM and BET methods. The influence of experimental parameters on the dye photodegradation process was studied and it was observed that photo reactivity of photocatalyst (LaMnO3) varied with the amount of catalyst, initial dye concentration, pH of the dye solution, H2O2 oxidant. The optimal experimental conditions were determined as follow: catalyst amount; 0.16gm/L, concentration of the dye solution; 10 ppm, pH of solution; 9.3 and 6% H2O2 solution under these optimum conditions, the obtained degradation efficiency for MB dye was 100 %. The reusability of the intended catalyst was also investigated.
