Photocatalytic degradation of methylene blue and antibacterial activity of silver nanoparticles synthesized from <i>Camellia sinensis</i> leaf extract

Green synthesis of silver nanoparticles (AgNPs) has attracted substantial interest and achievement due to their environmental friendliness, ease manipulation, potential for large-scale production. By using aqueous Camellia sinensis leaf extract, suspensions AgNPs, which possess photocatalytic biological activity, were successfully synthesized in this study. The reduction ions AgNPs was visually inspected via the colour reaction mixture, altered from pale yellow reddish brown. methods characterization as-synthesized performed Ultraviolet-Visible spectroscopy (UV-Vis), dynamic light scattering technique (DLS), X-ray diffraction analysis (XRD). surface plasmon resonance bands at 420-430 nm UV-Vis spectra indicated presence particles nanoscale. size determined by DLS, ranging 25 40 nm. XRD showed that highly pure crystalline. antibacterial activity against Gram-positive Gram-negative bacterial strains, including Staphylococcus aureus Escherichia coli, respectively, demonstrated disc diffusion method. examination conducted through methylene blue (MB) degrading experiments, MB performance approximately 95% within 72 h under sunlight.