摘要
通过改变机械球磨时间制备了不同长度的多壁碳纳米管(MWNTs)。透射电子显微镜(TEM)显示随着球磨时间的增加,碳纳米管的长度变短,管壁缺陷增多。利用循环伏安(CV)和交流阻抗(EIS)考察了球磨0、0.5、2、5 h MWNTs修饰电极在K3[Fe(CN)6]溶液中的电化学行为。CV显示球磨5 h碳纳米管修饰电极的氧化峰电流Ipa为18.53μA,比没有球磨的碳纳米管修饰电极的氧化峰电流Ipa(12.50μA)增大约50%。EIS谱图显示球磨后的MWNTs更能有效地促进Fe(CN)63–的扩散和电子转移,具有更高的电化学活性。
The multiwalled carbon nanotubes （MWNTs） with different length were prepared by changing mechanical ball milling time. The results of transmission electron microscopy showed the length of MWNTs became short and the detects increased with increasing milling time. The electrochemical activities of milled 0, 0.5, 2, 5 h MWNTs modified electrode in K3[Fe（CN）6] were examined by using cyclic voltametry （CV） and electrochemical impedance spectrum （EIS）. CV showed that the oxidation peak current Ipa of 5 h milled MWNTs modified electrode was 18.53 μA, which increased more than about 50 % compared with that of original MWNTs modified electrode（12.50 μA）. The electrochemical impedance spectrum indicated that the milled MWNTs could effectively promote the difthsion and electron transfer of Fe（CN）63 , and expressed higher electrochemical reactivity.
出处
《广东化工》
CAS
2008年第9期14-17,共4页
Guangdong Chemical Industry
关键词
机械球磨
MWNTS
修饰电极
电化学活性
mechanical ball milling
multiwalled carbon nanotubes
modified electrode
electrochemical reactivity
