Abstract
This work reports the green synthesis of a Cu/MgO nanocomposite using Cassytha filiformis L. extract as a reducing agent without stabilizers or surfactants. The immobilization of Cu NPs was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), field emission scanning electron microscopy (FESEM) and energy dispersive X-ray spectroscopy (EDS). The Cu/MgO nanocomposite acts as a heterogeneous and recyclable catalyst for the reduction of 4-nitrophenol (4-NP), 2,4-dinitrophenylhydrazine (2,4-DNPH), methylene blue (MB) and congo red (CR) using sodium borohydride in aqueous media at room temperature. The catalyst was recycled multiple times without any significant loss of its catalytic activity.
Highlights
The presence of azo dyes and nitroarene compounds in waste waters is of great concern for researchers
Among MNPs, copper nanoparticles (Cu NPs) have attained a particular attention because its cheapness and availability compared to other metal nanoparticles.[13,14,15]
We reported the preparation of Cu/MgO nanocomposite via a new, fast, simple, green, cost effective and ecofriendly process by using Cassytha liformis L. extract as stabilizing and reducing agent for the reduction of Cu2+ ion to Cu0
Summary
The presence of azo dyes and nitroarene compounds in waste waters is of great concern for researchers. It is arduous to remove them by natural degradation processes.[1,2] Degradation of the dyes to nondangerous products[3,4,5] and nitroarenes to useful compounds[6,7] are very important reactions. Scientists have introduced a reduction process in the presence of metal nanoparticles (MNPs) with NaBH4 as a reducing agent for the removal of pollutants from water.[8,9,10,11,12]. The synthesis of heterogeneous catalysts is one of the best ways to overcome the agglomeration of MNPs.[16,17,18,19,20] Recently, various research groups reported the green synthesis of MNPs
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