| Authors | Mohammad ali Nasseri,,Ali Allahresani |
|---|---|
| Journal | Journal of Environmental Chemical Engineering |
| Page number | 1-17 |
| Serial number | 10 |
| Volume number | 6 |
| Paper Type | Full Paper |
| Published At | 2022 |
| Journal Type | Typographic |
| Journal Country | Iran, Islamic Republic Of |
| Journal Index | Scopus |
Abstract
A novel and heterogeneous catalyst were prepared of magnetic nanoparticles Fe3O4 coated with silicate modified with graphene quantum dot-copper (GQD/Cu) and used as an efficient catalyst in the multicomponent reactions of Biginelli and Hantzsch. The nanocatalyst was examined by Fourier Transform Infrared (FTIR), thermogravimetric-differential thermal, X-ray powder diffraction (XRD), vibrating sample magnetometer (VSM), energy-dispersive X-ray (EDX), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM) analysis. A wide range of 3, 4-dihydro pyrimidine-2-(1 H)-one (DHPM) and 1, 4-dihydropyridine (DHP) derivatives were synthesized with good-to-excellent efficiencies in the presence of the catalyst using a combination of aldehydes, 1, 3-dicarbonyls, and urea/ammonium acetate. The catalyst was taken out and recovered from the reaction mixture by an external magnetic field and reused after six runs with minimal activity loss.