Green synthesis of metal nanoparticles and their applications in degradation of azo dye

Metal nanoparticles have recently attracted the attention of environmental remediation researchers.We present the green production of iron nanoparticles (FeNPs) using Azadirachta indica (neem) leaf extract.Green-generated FeNPs were characterized using several experimental techniques.The findings indicate that the most significant UV absorbance peak was obtained at 248 nm wavelength and the FT-IR peak was obtained at 594 cm -1 .Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results show the NPs are spherical and 48 nm in size, confirming the creation of zero-valent FeNPs.The nanoparticles were then used as a catalyst in methyl orange (MO) degradation in the presence of peroxodisulfate (PDS).The corresponding experiments evaluated the elimination kinetics and the effect of reactant concentrations.The loading experiment demonstrated that the dye was almost completely (83%) removed in 48 minutes.Liquid chromatography-mass spectrometry analysis was used to determine the structure of intermediates produced by MO degradation by FeNPs/PDS.Since synthesized FeNPs don't require costly reagents, they are an innovative, effective, promising, and environmentally friendly approach for improving PDS oxidation potential for MO degradation.