▎ 摘　　要

In this work, The production of graphene nanoribbon (GNR)/CoFe2O4 nanocomposite is described using a simple, cost-effective, and innovative technique. X-ray diffraction (XRD), transmission electron microscopy (TEM), and field emission scanning electron microscopy (FESEM) were proved that graphene nanoribbons and GNR-CoFe2O4 nanocomposite were successfully synthesized. The designed nano-sensor was employed for the determination of vanillin using a carbon paste electrode (CPE) modified with graphene nanoribbons-CoFe2O4 nanocomposite and 1-methyl-3-butylimidazolium bromide (ionic liquid (IL)). The electrochemical behavior modified electrode for vanillin detection exhibited excellent electrocatalytic activity with a high peak current. Under the optimized conditions, the calibration curve offered linearity over a wide range of 0.01-500 mu M, with a limit of detection of 5.2 nM. The fabricated nanosensor was successfully utilized for determination of vanillin in commercial real food samples with an outstanding recovery.