分析测试学报2011，Vol.30Issue(6)：607-611,5.DOI:10.3969/j.issn.1004-4957.2001.06.003
银掺杂改性蒙脱土修饰电极上对苯二酚的电化学行为与测定
Electrochemical Behavior and Determination of Hydroquinone on Silver/Treated Montmorillonite Modified Glassy Carbon Electrode
摘要
Abstract
A silver doped modified montmorillonite was made by octadecyl trimethyl ammonium bromide(STAB) and [ Ag( NH3 )2]OH, and characterized by X-ray diffraction, scanning electron microscopy and AC impedance method. The electrochemical behavior of hydroquinone on the electrode modified by the montmorillonite was investigated by cyclic voltammetry (CV) and some important kinetic paraeters of the electrochemical process were determined. The results indicated that the anode process of hydroquinone at electrode was controlled by adsorption - diffusion, and the cathodic process was controlled by diffusion. The number of electron transfer was equal to the number of protons (n =m =2), and the transfer coefficients α equals 0. 658 8 and β equals 0. 341 2. The effective area of Ag STAB - MMT/GCE(Aeff) was 0. 026 4 cm2, and the diffusion coefficient(D) was 6. 34 × 10 -5 cm2/s. The correlation between the peak current and concentration was investigated by square wave voltammetry (. SWV). A good linearity was obtained between the peak current and the concentration of hydroquinone in the range of 4. 0 × 10-6 -5.0 × 10-4 mol/L, with a detection limit of 1.13 × 10-7 mol/L. The method was applied in the determination of hydroquinone in real water with spiked recoveries of 100％ -108％. The modified electrode showed good reproducibility and stability.关键词
对苯二酚/改性蒙脱土/循环伏安法/方波伏安法/电化学行为Key words
hydroquinone/ modified montmorillonite/ circle voltammetry/ square wave voltammetry/ electrochemical behavior分类
化学化工引用本文复制引用
熊健,李容,朱伟琼,韩园园,何晓英..银掺杂改性蒙脱土修饰电极上对苯二酚的电化学行为与测定[J].分析测试学报,2011,30(6):607-611,5.基金项目
四川省教育厅资助项目(08zc007) （08zc007）
