摘要
制备不同尺寸的多壁碳纳米管(MWNT)修饰电极,应用循环伏安法研究了相同管径、不同管长和相同管长、不同管径的多壁碳纳米管修饰电极在K3Fe(CN)6溶液中的电化学行为及其对尿酸、多巴胺等生物分子的电催化作用,以及尺寸效应对碳纳米管修饰电极电化学活性的影响规律.结果显示,在同一条件下,短管的MWNT比长管的更能有效促进K3Fe(CN)6的电子传递,更有利于对生物分子的电催化;管径对它的电化学行为及生物电催化活性影响较小,无明显规律.主要原因在于碳纳米管管端、管壁的不同电化学活性.
The electrochemical activity of multi-walled carbon nanotubes（MWNTs） with different sizes, including four different MWNTs with the same length and different diameter, two different MWNTs with the same diameter and different length has been assessed and compared. The various MWNTs modified electrodes were prepared by immobilizing the suitable amount of MWNTs onto a glassy carbon electrode, and their voltammetric responses to ferricyanide, uric acid and dopamine were examined. The corresponding cyclic voltammetric data was showed that the electrochemical and electrocatalytic activities are depended on the nanotube length. The electrochemical reactivity of short MWNT（S-MWNT） is better than that of long MWNT（ L-MWNT）, which may be mainly attributed to the existence of the more open ends of the S-MCNT relative to L-MWNT.
出处
《电化学》
CAS
CSCD
北大核心
2007年第1期63-66,共4页
Journal of Electrochemistry
基金
上海市青年科技启明星项目(04QMX1443)
上海高校优秀青年后备人选计划
上海市教委科研基金(06DZ012)资助
