Highly efficient microwave assisted synthesis of magnetically separable GO-CoFe2O4 nanocomposite for visible light induced oxidative coupling of benzyl amines

摘要

The present paper describes an efficient microwave-assisted synthesis of magnetic CoFe2O4 and its nanocomposite with graphene oxide (GO-CoFe2O4) for photocatalytic oxidative coupling of benzylamines to the corresponding imines using molecular oxygen. The surface morphologies and structures of both CoFe2O4 and GO-CoFe2O4 nanocomposites were investigated by various spectroscopic techniques including powder X-ray diffraction (XRD), Transmission electron microscopy (HR-TEM), Fourier transform infrared spectroscopy (FTIR), nitrogen adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS) and Raman Spectroscopy. Photocatalytic oxidative coupling experiments demonstrated that GO-CoFe2O4 exhibited significantly higher efficiency than CoFe(2)O(4 )nanoparticles, suggesting that GO played an important role in the reaction. Moreover, the magnetic nature of the synthesized nanocomposite provided facile recovery of the material by the influence of an external magnet.