Highly Effective Degradation of Nitrophenols by Biometal Nanoparticles Synthesized using Caulis Spatholobi Extract

The green biosynthesis of metal nanoparticles (MNPs) has been proved to have many advantages over other methods due its simplicity, large-scale production, ecofriendly approach, and high catalytic efficiency. This work describes a single-step technique for synthesis colloidal silver (AgNPs) gold (AuNPs) using the extract from Caulis Spatholobi stems. Ultraviolet-visible spectroscopy measurements were used optimize main factors, including ion concentration, reaction time, temperature via surface plasmon resonance phenomenon. Fourier-transform infrared showed possible functional groups responsible reducing stabilizing synthesized MNPs. powder X-ray diffraction selected area electron analysis confirmed crystalline nature biosynthesized High-resolution transmission microscopy revealed spherical shape MNPs with an average size 10-20 nm. obtained also exhibited enhanced activity in reduction 2-nitrophenol 3-nitrophenol.