The electrochemical behavior of AA and DA on graphene oxide modified electrodes containing various content of oxygen functional groups

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Vol. 661; no. 1; pp. 77 - 83
• Main Authors: Xiong, Hui, Jin, Baokang
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01.10.2011; Elsevier
• Subjects: Analytical biochemistry: general aspects, technics, instrumentation; Analytical, structural and metabolic biochemistry; Ascorbic acid; Biological and medical sciences; Chemistry; Detection; Dopamine; Electrochemical; Electrochemistry; electrodes; Electrodes: preparations and properties; Exact sciences and technology; Fundamental and applied biological sciences. Psychology; General and physical chemistry; graphene; iron; Modified electrode; Other electrodes; oxygen; Oxygen-containing functional groups; Oxygen-containing functional groups; Ascorbic acid; Dopamine; Detection; Modified electrode; Electrochemical; Chemical analysis; Vitamin; Differential impulse voltamperometry; Catecholamine; Carbon; Electrochemical detector; Electrodes; Electrocatalysis; Biogenic amine; Amperometry; Oxidation; Graphene oxide; Electrochemical reaction; Glassy state; Modified material
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2011.06.034

► Controllable reduction in graphene oxide is realized by adjusting reduction conditions. ► Graphene modified electrodes containing various content of oxygen groups are fabricated. ► Electrochemical behavior of AA and DA on graphene modified electrodes is studied. ► The results indicate that the role various oxygen groups play is significant and wildly different. ► The optimum reducing conditions are explored to detect them and the results are satisfactory. Electrochemically reduced graphene oxide modified glassy carbon electrodes (ERGC) were obtained under various reducing conditions to control the content of oxygen-functional groups (OxFG). By utilizing Fe(CN)63-/Fe(CN)64-, AA and DA as redox probes cyclic voltammogram (CV) and differential pulse voltammogram (DPV) results indicated that for various substances the effect of OxFG was distinct and different types of OxFG (CO, COC, OH, COOH, etc.) played entirely different roles for one substance which were reflected in peak potential shift and peak current change. Finally, the optimum reducing conditions of fabricating ERGC for the detection of AA and DA separately and simultaneously were explored and satisfactory results were obtained.