Evaluation of Photocatalytic Efficacy of Biosynthesized Cubic Nife₂O₄ Nanoparticles

In this study, we report the biosynthesis of Nickel ferrite using Ocimum sanctum leaf extract (OSLE@NiFe 2 O[Formula: see text]. The single-phase cubic spinel structure of the synthesized nickel ferrite was confirmed by powder X-ray diffraction (PXRD) analysis. Structural characteristics were further examined using FTIR analysis. Optical and morphological properties were investigated through UV–DRS and FESEM studies. The magnetic hysteresis loop (M-H loop) confirmed the superparamagnetic nature of OSLE@NiFe 2 O 4 nanoparticles. The photocatalytic degradation of Congo Red (CR) dye by the synthesized OSLE@NiFe 2 O 4 nanoparticles was explored, revealing a pseudo-first-order kinetic behavior with a degradation efficiency of 99.9% and a rate constant of 0.06[Formula: see text]min[Formula: see text]. These findings demonstrate the superior photocatalytic activity of the biosynthesized nickel ferrite nanoparticles, highlighting their significant potential for efficient dye removal.