High performance electrochemical sensor based on fullerene-functionalized carbon nanotubes/ionic liquid: Determination of some catecholamines

摘要

The combination of fullerene (C_(60))-functionalized multiwalled carbon nanotubes (CNTs) and ionic liquid (IL) that yields a nanostructured modified electrode formed a novel kind of structurally uniform and electrocatalytic activitymaterial. Themodified electrode was characterized by different methods. It was found that the nanocomposite film of C_(60)-CNT/IL on glassy carbon electrode exhibits excellent electrocatalytic activity towards catecholamines, including norepinephrine (NE), isoprenaline (IP) and dopamine (DA) oxidation, resulting in a marked lowering in the peak potential and considerable improvement of the peak current as compared to the electrochemical activity at the bare glassy carbon electrode. The improvement of electrochemical response to catecholamine oxidationwas found at modified electrode, revealing the synergetic effect of C_(60)-CNT and IL. Furthermore, the catecholamines were successfully used for the determination of catecholamines in real samples.