Abstract
The sol-gel method was used to prepare La2NiO4, La2CuO4, and La2NiO4/g-C3N4 and La2CuO4/g-C3N4 nanoparticles. The structural and surface morphology of prepared nanoparticles were evaluated by scanning electron microscopy (SEM) and x-ray diffraction (XRD) techniques. FT-IR analysis confirmed the presence of metal-oxygen bonds (M-O). The bandgap from the Tauc plot was studied by UV-Vis spectroscopy. Synthesized materials were used as photocatalysts for the degradation of methylene blue dye as a function of medium pH (2-12). The photocatalyst potential was compared for La2NiO4/g-C3N4 and La2CuO4/g-C3N4 and maximum photocatalytic activity was observed in basic medium. The enhanced photocatalytic activity is due to effective charge transfer between VB and CB in the presence of g-C3N4 which resultantly enhanced the formation of reactive species (•OH and -•O2) that are responsible for the degradation of methylene blue dye. Hence, it is concluded that fabricated nanoparticles could be employed for the removal of toxic pollutants from industrial effluents.
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