title: Green synthesis, characterization and catalytic activity of natural bentonite-supported copper nanoparticles for the solvent-free synthesis of 1-substituted 1H-1,2,3,4-tetrazoles and reduction of 4-nitrophenol.
abstract: In this study, Cu nanoparticles were immobilized on the surface of natural bentonite using Thymus vulgaris extract as a reducing and stabilizing agent. The natural bentonite-supported copper nanoparticles (Cu NPs/bentonite) were characterized by FTIR spectroscopy, X-ray diffraction (XRD), X-ray fluorescence (XRF), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and Brunauer-Emmett-Teller (BET) analysis. Afterward, the catalytic performance of the prepared catalyst was investigated for the solvent-free synthesis of 1-substituted 1H -1,2,3,4-tetrazoles and reduction of 4-nitrophenol (4-NP) in water. It was found that the Cu NPs/bentonite is a highly active and recyclable catalyst for related reactions.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Qom, P.O. Box 37185-359, Qom, Iran.
authors.forename: Akbar
authors.initials: A
authors.lastname: Rostami-Vartooni
authors.affiliation: Department of Chemistry, Faculty of Science, University of Qom, P.O. Box 37185-359, Qom, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Alizadeh
authors.affiliation: Material Research School, NSTRI, 81465-1589, Isfahan, Iran.
authors.forename: Mojtaba
authors.initials: M
authors.lastname: Bagherzadeh
keywords: 1-substituted 1H-1,2,3,4-tetrazoles; heterogeneous catalyst; modified bentonite; nanocomposite