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Environmentally benign copper nanoparticles supported on walnut shell as a highly durable nanocatalyst for the synthesis of propargylamines

Saadati Fariba (University of Zanjan, Faculty of Science, Department of Chemistry, Zanjan, Iran)
Leghaei Vahid (University of Zanjan, Faculty of Science, Department of Chemistry, Zanjan, Iran)
Zamani Asghar (Urmia University, Faculty of Science, Department of Nanotechnology, Urmia, Urmia, Iran)

This study was an attempt to prepare copper nanoparticles and to determine their catalytic activity employing walnut shell (WS) residue as a green support and a reusable material. The nanocatalyst was characterized though inductively coupled plasma optical emission spectrometry (ICP-OES), N2-sorption analysis, X-ray powder diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). The catalytic performance of CuNPs@WS was then studied in the preparation of propargylamines via a three-component reaction. The catalyst could be recovered and reused without a significant decrease in its activity over eight reaction cycles. The simple methodology described herein is an economic, ecofriendly and practical method accompanied by higher yields.

Keywords: walnut shell, nanoparticle, reused material, copper, propargylamine