The photo catalytic
activity of MgAl2O4 product was studied by performing the decomposition of Reactive Red Me 4BL dye
under UV illumination or sunlight irradiation. The dye considerably photocatalytically degraded by
90.0% and 95.45% under UV and sunlight irradiation, respectively, within ca. 5 h with pseudo first order
rate constants of 5.85 _ 10_3 and 8.38 _ 10_3 min_1, respectively.