4.8 Article

Electro-oxidation of amino-functionalized multiwalled carbon nanotubes

期刊

CHEMICAL SCIENCE
卷 13, 期 5, 页码 1355-1366

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1sc06122d

关键词

-

向作者/读者索取更多资源

The electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) was investigated in different pH conditions. It was found that non-functionalized MWCNTs can catalyze solvent decomposition and undergo irreversible electro-oxidation. The oxidation of amino-functionalized MWCNTs was dependent on the pH of the solution, reflecting the deprotonation of amino groups.
We report the electrochemistry of amino-functionalized multiwalled carbon nanotubes (MWCNTs-NH2) in the pH range from 0.3 to 6.4 using quantitative cyclic voltammetry (CV) and single entity electrochemistry measurements, making comparison with non-functionalized MWCNTs. CV showed the latter to both catalyze the solvent (water) decomposition and to undergo irreversible electro-oxidation forming oxygen containing surface functionality. The MWCNTs-NH2 additionally undergo an irreversible oxidation to an extent which is dependent on the pH of the solution, reflecting the variable amount of deprotonated amino groups present as a function of pH. Nano-impact experiments conducted at the single particle level confirmed the oxidation of both types of MWCNTs, showing agreement with the CV. The pK(a) of the amino groups in MWCNTs was determined via both electrochemical methods giving consistent values of ca. 2.5.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.8
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据