Efficient photocatalytic degradation of multiple organic dyes by <scp> ZnFe ₂ O ₄ </scp> magnetic nanoparticles synthesized by using Indian rosewood plant leaves extract

Abstract The present study introduces an expedited, economical, and ecofriendly synthetic approach toward ZnFe 2 O 4 MNPs using Dalbergia sissoo plant leaves extract under microwave irradiation. The extract is a multifunctional agent that reduces, stabilizes, and control the size. ZnFe 2 O 4 NPs were duly characterized by various advanced physiological characterization techniques, viz . FTIR, UV–Vis, TGA, FE‐SEM, and XRD. These nanoparticles exhibited remarkable photocatalytic degradation capabilities for various organic dyes, namely Methylene Blue, Rhodamine B, Hydroxy Naphthol Blue, and Brilliant Green. The catalytic activity may be attributed to the optical band gap estimated at 1.9, 2.14, and 2.43 eV. The percentage degradation of the above dyes ranges from 99% to 54% in just 20 minutes. The same catalyst was reverted and reused at least 5 times without appreciable loss in efficacy. Thermal stability up to 600°C supports its robust nature and applicability at high temperatures.