Decorated gold nanoparticles over magnetic carboxymethyl lignin composite as a novel catalyst in the reduction of aromatic nitro compounds

In the past few years, bio-functionalized advanced nanomaterials containing magnetic core has been materialized as potential future catalysts in diverse applications. In this connection, we report herein a novel Au nanoparticle immobilized on carboxymethyl lignin (CML) modified Fe۳O۴ nanoparticles (Fe۳O۴@CML/Au NPs). It was synthesized following a biogenic sustainable procedure without the involvement of any harsh reducing or stabilizing agent. The morphology and structural features were assessed following different physicochemical methodologies like Fourier Transformed Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Energy Dispersive X-ray Spectroscopy (EDS), X-ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM) and Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The Fe۳O۴@CML/Au NPs nanocomposite was successfully employed in the efficient reduction of different nitroarenes in aqueous medium. An excellent yield were achieved within very short reaction time. The nanocatalyst was easily magnetically recovered and recycled ten times without any significant loss of catalytic activity.

کلیدواژه ها:

Fe۳O۴@CML/Au ، Carboxymethyl lignin ، Reduction ، Nitro compounds