Facile green synthesis of magnesium oxide nanoparticles using tea (Camellia sinensis) extract for efficient photocatalytic degradation of methylene blue dye

Herein, we report, for the first time, synthesis, characterization, and photocatalytic methyl blue dye degradation performance of magnesium oxide (MgO) nanoparticles (NPs) synthesized by a facile green approach using Camellia sinensis (tea leaves) extract as reducing agent. The as-prepared materials were characterized X-ray diffraction (XRD), which confirmed large-scale synthesis well crystalline cubic phase MgO NPs. Rietveld refinement analysis XRD pattern was done to determine crystallographic parameters NPs investigate lattice defects. Microstrain, stress, energy density calculated Williamson–Hall exhibited over 97% efficiency methylene (MB) dye. Complementary functional theory (DFT) calculations revealed favorable formation O 2 − radicals on (001) surface drivers MB degradation. • Facile Synthesis Almost complete nanoparticles. Confirmation - first-principles DFT calculations.