Abstract

Pure and Ni-doped magnesium oxide (MgO) (1-5 mol %) nanoparticles (NPs) were synthesized by facile green
synthesis using Synadenium grantii plant extract. The formed NPs were characterized by powder X-ray diffraction
(PXRD), scanning electron microscopy, Fourier transform infrared, photocatalysis, and photoluminescence
techniques. PXRD results exhibit the presence of cubic structure for all the synthesized samples. The photocatalytic
activities of pure MgO and Ni-doped MgO photocatalysts were evaluated for the degradation of methylene blue
(MB) under ultraviolet light. The photocatalytic results clearly demonstrate that Ni-doped MgO (5 mol %) has
shown a good photocatalytic activity for degradation of MB for 60 min with a degradation rate of 94%. Therefore,
this work directs new possibilities to provide some new insights into the design of new green synthesized
photocatalysts with high photocatalytic activity for degradation of dyes.