Mineralization of dichlorvos pesticide by copper nanoparticles: optical absorption and energy band gap analysis
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Date
2020-12
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Nanoparticles are getting great attention globally due to their unique physical and chemical properties, high surface area and nanoscale size etc. In the present work, the suspension of copper nanoparticles was prepared and studied the application of Cu NP’s in the degradation of dichlorvos pesticide. To obtain stable suspension of Cu NP’s, a specific amount of isopropanol solvent and surfactant i.e. oleic acid were chosen. XRD technique was used to estimate particle size and phase analysis of Cu nanopowder. UVVIS and FTIR spectroscopy were used for characterization of prepared Cu nanosuspension. It inferred that the oleic acid efficiently stabilized the nanosuspension but it was not sufficient to prevent the oxidation of Cu NP’s. To study the application of Cu NP’s in pesticide degradation, solution of different concentrations of dichlorvos pesticide were prepared. A specific amount of Cu nanosuspension was added to prepared pesticide solutions and observed with time. The effect of Cu NP’s on dichlorvos pesticide was observed by observing the change in colour of samples with time. UV-VIS and FTIR spectroscopy were used to characterize the reaction products. The UV-VIS plasmon of nanosuspension showed a red shift. The FTIR spectra confirmed the degradation of organic bonds of the dichlorvos. As a result of the interaction between dichlorvos and Cu NP’s, the pesticides have been successfully degraded.