多壁碳纳米管修饰碳离子液体电极在多巴胺电化学催化氧化中的应用。
Application of multi-walled carbon nanotubes modified carbon ionic liquid electrode for electrocatalytic oxidation of dopamine.
机构信息
State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Hunan, Changsha, PR China.
出版信息
Colloids Surf B Biointerfaces. 2011 Nov 1;88(1):402-6. doi: 10.1016/j.colsurfb.2011.07.021. Epub 2011 Jul 20.
A simple, sensitive, and reliable method based on a multi-walled carbon nanotubes (MWNTs) modified carbon ionic liquid electrode (CILE) has been successfully developed for determination of dopamine (DA) in the presence of ascorbic acid (AA). The acid-treated MWNTs with carboxylic acid functional groups could promote the electron-transfer reaction of DA and inhibit the voltammetric response of AA. Due to the good performance of the ionic liquid, the electrochemical response of DA on the MWNTs/CILE was better than that of other MWNTs modified electrodes. Under the optimum conditions a linear calibration plot was obtained in the range 5.0×10(-8) to 2.0×10(-4) mol L(-1) and the detection limit was 1.0×10(-8) mol L(-1).
基于多壁碳纳米管（MWNTs）修饰碳离子液体电极（CILE），我们成功开发了一种简单、灵敏、可靠的方法，用于在抗坏血酸（AA）存在的情况下测定多巴胺（DA）。经过酸处理的 MWNTs 带有羧酸官能团，可促进 DA 的电子转移反应并抑制 AA 的伏安响应。由于离子液体的优良性能，DA 在 MWNTs/CILE 上的电化学响应优于其他 MWNTs 修饰电极。在最佳条件下，该方法在 5.0×10(-8) 到 2.0×10(-4) mol L(-1) 的范围内呈现出良好的线性校准曲线，检测限为 1.0×10(-8) mol L(-1)。
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