▎ 摘　　要

Here in this study, a new iodine-modified magnetic nanocomposite (I@rGO@CoFe2O4) has been described. FT-IR, XRD, SEM, TEM, EDX, TGA, and VSM techniques confirm the construction of I@rGO@CoFe2O4 nanocomposite and show ferromagnetic properties with a significant magnetization saturation (35.9 emu g(-1)). A deep eutectic solvent (DES) potassium triiodide-choline chloride (KI3 : ChCl) has been used as a reducing agent and for modification of magnetic graphene oxide sheets. In addition, the applicability of the nanocomposite has been well demonstrated for acetylation of some phenol, alcohol, and sugar derivatives in solvent-free conditions at room temperature. Increasing catalytic activity, high selectivity, reducing environmental hazards, and reusing the catalyst without significantly reducing activity are among the advantages of this method.