Electrocatalysis of emodin at multi-wall nanotubes

详细信息	查看全文 | 推荐本文 |

• 作者：Zhao-Hui Yin ; Qiao Xu ; Yi Tu ; Qiu-Ju Zou ; Jiu-Hong Yu ; Yuan-Di Zhao
• 关键词：Carbon nanotube ; Modified electrode ; Emodin ; Determination
• 刊名：Bioelectrochemistry
• 出版年：2008
• 期刊代码：7_15675394
• 类别：ch
• 出版时间：April 2008
• 卷：72
• 期：2
• 页码：155-160
• 文件大小：403 K

摘要

In this article, the electrochemical behavior of emodin at multi-wall carbon nanotube modified glassy carbon electrodes (MWNTs/GCE) was studied. The result showed that MWNTs/GCE had high electrocatalytic activity for emodin. And the electrocatalytic redox process was a two-charge-two-proton process. Diffusion coefficient (D_R) of 8.403 × 10^{− 5} cm² s^{− 1} of emodin was obtained. Further experiments demonstrated that the oxidative peaks increased linearly with emodin concentrations in the range of 1.0 × 10^{− 6} to 1.0 × 10^{− 4} M with a limit of detection of 3.0 × 10^{− 7} M. This electrochemical method was accurate and reliable, therefore, it might provide a novel way for emodin detection.