分析测试学报2011，Vol.30Issue(9)：976-982,7.DOI:10.3969/j.issn.1004-4957.2011.09.005
曲克芦丁在羧基化单壁碳纳米管修饰电极上的电化学氧化
Electrocatalytic Oxidation of Troxerutin Using Single-walled Carbon Nanotubes with Carboxyl Modified Glassy Carbon Electrode
摘要
Abstract
The single-walled carbon nanotubes with carboxyl modified glassy carbon electrode ( SWC-NTs - COOH/GCE) was prepared. The prepared electrode films were characterized by scanning electron microscopy ( SEM) and electrochemical impedance spectroscopy(EIS) method. The SEM results showed that SWCNTs - COOH/GCE electrode was coated with a film of nano structure of intricate network through homogeneous distribution of SWCNTs - COOH in anhydrous ethyl alcohol solution. The EIS results showed that SWCNTs - COOH/GCE electrode had a good electrocatalytic response to the electron transfer of [Fe(CN)6]3-/4-. The electrochemical behavior of troxerutin was studied by cyclic voltammetry(CV). The result indicated that the SWCNTs - COOH/GCE electrode exhibited a remarkable catalytic and enhanced effect on the current response of troxerutin. The electrode reaction was a process of one-electron and one-proton transfer, and its oxidation mechanization may attribute to the oxidation of phenolic hydroxyl from troxerutin to carboxyl based on the product of constant electrolyte-voltage oxidation of troxerutin. The diffusion coefficient ( D) was 1. 10 × 10 -6 cm2 · S-1 and the rate constant(k) was 9. 87 ×10-3 mol · L-1 · S-1. Under the optimum condition, the response of the peak (E =0. 85 V) was proportional to the troxerutin concentration in the range of 8. 04 × 10-7 -6.41 × 10 -4 mol · L-1 with a detection limit of 5. 01 ×10-7 mol · L-1. The RSDs(n = 10) of troxerutin were 3. 1% . The method was applied in the determination of troxerutin in real sample with satisfactory result.关键词
羧基化单壁碳纳米管/化学修饰电极/曲克芦丁/循环伏安/电催化氧化Key words
SWCNTs - COOH/ chemically modified electrode/ troxerutin/ cyclic voltatnmetry (CV)/ electrocatalytic oxidation分类
化学化工引用本文复制引用
洪涛,周群,段德良,武云,曹秋娥,丁中涛..曲克芦丁在羧基化单壁碳纳米管修饰电极上的电化学氧化[J].分析测试学报,2011,30(9):976-982,7.基金项目
云南省教育厅科学研究基金重点资助项目(08Z0010) （08Z0010）
云南大学理工科校基金资助项目(2008YB039) （2008YB039）
