Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
181514 | Electrochemistry Communications | 2009 | 4 Pages |
Abstract
The surface acid–base property of carboxylic multi-walled carbon nanotubes (MWNTs) is investigated by zero current potentiometry with a new electrochemical measurement system. The pH dependent interface potential variation at the interface of carboxylic MWNTs/solution is investigated by measuring zero current potential Ezcp. In the pH range of 1–11, the pH response of carboxylic MWNTs exhibits two linear relationships according to the following equations: Ezcp = 0.791–0.0535 pH (pH 1–5.1) and Ezcp = 0.643–0.0241 pH (pH 5.1–11), respectively. The intersection at pH 5.1 of two regions indicates the surface pKa value of carboxylic group terminated MWNTs.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Wei Gao, Junfeng Song,