Peltophorum pterocarpum flower mediated synthesis of silver nanoparticles and its catalytic degradation of Acid Blue 113 dye

In this study, silver nanoparticles (AgNPs) were synthesized using a green method involving Peltophorum pterocarpum flower extract. Successful formation of AgNPs was confirmed by a characteristic surface plasmon resonance peak at 416 nm in the UV–Vis spectrum. SEM and TEM analyses revealed uniformly spheroidal nanoparticles with an average size of 25.77 nm, while EDX confirmed the presence of silver. SAED patterns showed bright spots, indicating a polycrystalline nature, which was further supported by XRD, revealing a crystallite size of 15.58 nm and a lattice parameter of 0.4007 nm. FTIR spectra identified hydroxyl and carboxyl groups as key agents in nanoparticle reduction and stabilization. DLS analysis reported a hydrodynamic diameter of 99.41 nm and a PDI of 0.326, suggesting good monodispersity. The nanoparticles exhibited good stability with a zeta potential of − 14.7 mV. Catalytic studies showed rapid degradation of Acid Blue 113 dye in the presence of NaBH₄, achieving a rate constant of 0.247 min⁻¹ at 30 mg/L. These results demonstrate the environmental remediation potential of biogenically synthesized AgNPs and underscore the benefits of sustainable green synthesis approaches for industrial wastewater treatment.