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Background: Dye pollutants are hazardous to environment and community health.ZnO nanoparticles synthesized by leaf extract of Plumeria alba L. were tested to degrade pollutants through photocatalysis.The pollutants used in this study are organic dyes-Methylene Blue (MB), Bromophenol Blue (BB), Malachite Green (MG) and Crystal Violet (CV).These dye pollutants are commonly used in various industries, washed away, and mixed up in the water bodies.Methods: The present work presents a green production technique for ZnO nanoparticles (ZnO NPs) that is easy, cost-effective, eco-friendly, and uses P. alba L. aqueous leaf extract and 0.5 M dehydrated zinc acetate.Fourier transform infrared spectroscopy (FT-IR) and UV-visible spectroscopy (absorption band at 355 nm) were used to characterize the synthesized ZnO NPs.Results: FT-IR spectra revealed that polyols, terpenoids, and proteins with functional groups of amines, alcohols, ketones, and carboxylic acids were involved in the steps leading to the production of ZnO NP.TEM results confirmed the average size of NPs is 19.4 nm.Spectrophotometric results showed that MB, BB, MG and CV dyes (with absorption maxima at 656 nm, 590 nm, 616nm and 582 nm, respectively) were degraded gradually with increased irradiation time. Conclusion:It was thus demonstrated that green synthesized ZnO NPs are a potent photocatalyst that may be effectively used to degrade hazardous and toxic contaminants in aquatic environments.
Mathur et al. (Fri,) studied this question.