The ecologically safe synthesis of manganese oxide nanoparticles from sodium hydroxide solution was achieved by using Ziziphus oenoplia fruit extract as a bio-reductant. The synthesis of manganese oxide nanoparticles was confirmed by the characteristic SPR bands observed in the bio-fabricated nanostructures. Powder X-ray diffraction studies reveal the tetragonal phase. The distinct spherical shapes of manganese oxide nanoparticles was demonstrated by scanning electron microscopy. With oxygen and manganese peaks, the corresponding Energy Dispersive X-ray spectra confirm the elemental composition. Manganese oxide nanoparticles were also used to perform the Methylene blue dye breakdown by photo-catalysis. The effects of concentration, time, pH, and catalyst dosage was investigated in this study. Degradation slows down as dye concentration rises. The dye began to deteriorate at 10ppm as a result of concentration. Within sixty minutes, the dye colour deteriorated. At pH 9, the degradation percentage was 90, indicating a successful outcome. When the catalyst dosage was increased from 0.005 to 0.013, the percentage of degradation also increased from 49% to 93%. Consequently, the generated Manganese Oxide nanoparticles functioned as a photo-catalyst in the purification of polluted wastewater.
Sathasivam et al. (Wed,) studied this question.