【作者】 卜彩红； 张义军； 李莉； 赵雪萍； 南志汉； 裘宇； 卢小泉； 刘秀辉；

【Author】 Caihong Bu;Yijun Zhang;Li Li;Xueping Zhao;Zhihan Nan;Yu Qiu;Xiaoquan Lu;Xiuhui Liu;Key Laboratory Bioelectrochemistry & Enviromental Analysis of Gansu Province,College of Chemistry & Chemical Engineering, Northwest Normal University;

【机构】 甘肃省生物电化学与环境分析重点实验室 西北师范大学化学化工学院；

【摘要】 <正>用多壁碳纳米管(MWCNTs)和离子液体(IL)胶修饰的电极,作为同时测定对苯二酚(HQ)和邻苯二酚(CC)的一种传感器。对苯二酚、邻苯二酚与多壁碳纳米管和离子液体胶修饰电极之间的电子转移速率常数分别是7.402 s-1,8.179 s-1;对苯二酚和邻苯二酚在多壁碳纳米管离子液体胶修饰电极上的吸附量为1.408×10-6 mol cm-2。跟裸的玻碳电极相比,对苯二酚、邻苯二酚在多壁碳纳更多还原

【Abstract】 MWNTs-IL-Gel/GCE, which is an electrode modified with multiwalled carbon nanotubes(MWNTs) and ionic liquids(IL), was developed to serve as a sensor for the simultaneous determination of Hydroquinone(HQ) and catechol(CC) in this paper. The constant of apparent electron transfer rate between HQ and MWNTs-IL-Gel/ GCE,CC and MWNTs-IL-Gel/GCE by using Cyclic voltammograms was 7.402 s-1, and 8.179 s-1, respectively; the absorption quantity of HQ and CC at MWNTs-IL-Gel/ GCE employing chronocoulometry was 1.408×10-6 mol cm-2. Compared with the bare GCE, the oxidation peaks of HQ and CC were clearly separated with peak potentials of 153 and 262 m V at MWNTs-IL-Gel/GCE, respectively. At the same time, the anodic currents for the oxidation of both HQ and CC were greatly increased at MWNTs-IL-Gel/GCE. The differential pulse voltammetry(DPV) showed a linear response ranging between 3.5×10-5 and 1.8×10-7 M with detection limits of 6.7×10-8 M and 6.0×10-8 M for the HQ and CC, respectively. This method can be applied to direct determination of HQ and CC in aqueous solution and the results are satisfactory.更多还原