LAUSR

The catalytic activity of UiO-66@Fe3O4@SiO2 catalyst was investigated in the fixation of carbon dioxide with epoxides under mild conditions. In this manner, a facile magnetization of UiO-66 was achieved simultaneously by simply mixing this metal–organic framework and silica-coated Fe3O4 nanoparticles in solution under sonication. The prepared catalyst was characterized using Fourier transform infrared and UV–visible spectroscopies, X-ray diffraction, transmission and field emission scanning electron microscopies, N2 adsorption and inductively coupled plasma atomic emission spectroscopy. This new heterogeneous catalyst was applied as a highly efficient catalyst in the coupling of carbon dioxide with epoxides at mild temperatures and pressures. Furthermore, it could be easily recovered with the assistance of an external magnetic field and reused three consecutive times without significant loss of activity and mass.