Manufacture and evaluation of carbon nanotube modified screen-printed electrodes as electrochemical tools
Manufacture and evaluation of carbon nanotube modified screen-printed electrodes as electrochemical tools
复制标题
DOI：
10.1016/j.talanta.2007.07.035
复制
发表时间：
2007-12-15
期刊：
影响因子：
6.1
通讯作者：
Costa-Garcia, Agustifn
中科院分区：
文献类型：
--
作者：
Fanjul-Bolado, Pablo;Queipo, Paula;Costa-Garcia, Agustifn
将羧化的多金属化碳纳米管（MWCNT-COOH）溶解在DMF：水的混合物中，用于修饰市售丝网印刷电极（SPE）的表面。用透射电子显微镜（TEM）和扫描电子显微镜（SEM）分别对MWCNT-COOH和改性SPE的形貌进行了表征。扫描电镜分析表明，在工作电极表面形成了由无序纳米管薄膜构成的多孔结构。优化了MWCNT-COOH的修饰过程，并以对氨基苯酚为基准氧化还原体系，将其应用于统一不同金和碳SPE的电化学行为。MWCNT-COOH-改性SPE作为伏安和安培检测器以及它们的催化性能的分析优势进行了讨论，通过分析，例如，多巴胺和过氧化氢。实验结果表明，纳米管修饰电极的电化学活性面积增加了约50%。修饰方法的重复性约为6%（R.S.D.）。且MWCNT-COOH改性SPE的稳定性至少可保证2个月。(c)2007 Elsevier B. V.保留所有权利。
Carboxylated multimalled carbon nanotubes (MWCNT-COOH) dissolved in a mixture of DMF:water were used to modify the surfaces of commercially available screen-printed electrodes (SPEs). The morphology of the MWCNT-COOH and the modified SPEs was characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. SEM analysis showed a porous structure formed by a film of disordered nanotubes on the surface of the working electrode. The modification procedure with MWCNT-COOH was optimised and it was applied to unify the electrochemical behaviour of different gold and carbon SPEs by using p-aminophenol as the benchmark redox system. The analytical advantages of the MWCNT-COOH-modified SPEs as voltammetric and amperometric detectors as well as their catalytic properties were discussed through the analysis, for instance, of dopamine and hydrogen peroxide. Experimental results show that the electrochemical active area of the nanotube-modified electrode increased around 50%. The repeatability of the modification methodology is around 6% (R.S.D.) and the stability of MWCNT-COOH-modified SPEs is ensured for, at least, 2 months. (c) 2007 Elsevier B.V. All rights reserved.