Carbon-nanotube-modified glassy carbon electrode for simultaneous determination of dopamine, ascorbic acid and uric acid: The effect of functional groups

Bi, Huaqing, Li, Yanhui, Liu, Shufeng, Guo, Peizhi, Wei, Zhongbin, Lv, Chunxiao, Zhang, Jizhen and Zhao, X. S. (2012) Carbon-nanotube-modified glassy carbon electrode for simultaneous determination of dopamine, ascorbic acid and uric acid: The effect of functional groups. Sensors and Actuators B-Chemical, 171-172 1132-1140. doi:10.1016/j.snb.2012.06.044


Author Bi, Huaqing
Li, Yanhui
Liu, Shufeng
Guo, Peizhi
Wei, Zhongbin
Lv, Chunxiao
Zhang, Jizhen
Zhao, X. S.
Title Carbon-nanotube-modified glassy carbon electrode for simultaneous determination of dopamine, ascorbic acid and uric acid: The effect of functional groups
Journal name Sensors and Actuators B-Chemical   Check publisher's open access policy
ISSN 0925-4005
1873-3077
Publication date 2012-08
Sub-type Article (original research)
DOI 10.1016/j.snb.2012.06.044
Volume 171-172
Start page 1132
End page 1140
Total pages 9
Place of publication Lausanne, Switzerland
Publisher Elsevier
Collection year 2013
Language eng
Abstract The effect of surface functional groups of multi-wall carbon nanotube (MWCNT) in MWCNT-modified glassy carbon electrode (MWCNT/GCE) on the simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA) was studied. Pristine MWCNT (MWCNT-P), acid-treated MWCNT (MWCNT-T), carboxyl-containing MWCNT (MWCNT-COOH), and hydroxyl-containing MWCNT (MWCNT-OH) were prepared and compared. The order of carbon content in the MWCNT was found to follow MWCNT-T < MWCNT-COOH < MWCNT-OH < MWCNT-P based on X-ray photoelectron spectroscopic (XPS) data. It was also found that sample MWCNT-T had the highest defect density but the lowest electrical resistance among the functionalized MWCNT based on the results of Raman spectroscopy and electrochemical impedance spectroscopy (EIS). The electrooxidation performance of the MWCNT/GCE toward simultaneous determination of DA, UA and AA in a ternary solution followed the order of MWCNT-T > MWCNT-COOH > MWCNT-OH > MWCNT-P. Based on the experimental results, the relationship between the electrocatalytic properties and the nature of functional groups of MWCNT was discussed.
Keyword Multi-walled carbon nanotube
Glassy carbon electrode
Uric acid
Ascorbic acid
Dopamine
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Official 2013 Collection
 
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