聚吡咯/STAB-NaMMT/GC电极对苯二酚的电化学行为研究

The Electrochemical Behaviors of Hydroquinone on Polypyrrole/STAB-NaMMT/GC Electrode

利用十八烷基三甲基溴化氨(STAB)和聚吡咯(PPy)钠基蒙脱土制备了PPy/STAB钠基蒙脱土/GC电极(PPy/STAB-NaMMT/GC).用循环伏安法和方波溶出伏安法(SWSV)研究了对苯二酚在该电极上的电化学行为.实验表明,在pH 6.0 PBS电解液中,对苯二酚在该电极的电极反应受扩散控制,转移的电子数与质子数相等,即n=m=1,电极有效面积A=0.031cm2.在优化条件下,方波溶出法峰电流与对苯二酚浓度于8.0×10-6～8.0×10-4 mol/L范围内呈线性关系,检测下限1.0×10-6 mol/L,回收率达到检测要求,结果令人满意.

The PPy/STAB-MMT/GC electrode was made using montmorillonite modified by STAB and polypyrrole（PPy）.The electrochemical behaviors of hydroquinone on the PPy/STAB-MMT/GC electrode were researched by cyclic voltammetry and square wave stripping voltammetry（SWSV）.The results showed that the electrode reaction occurred on the hydroquinone electrode was controlled by diffusion in PBS（pH=6.0）.The number of electron transfer was equal to the number of protons（n=m=1） with the effective area of PPy/STAB-NaMMT/GC electrode Aeff=0.031 cm^2.Under the optimized conditions,the linear response of peak current in SWSV with the concentration of hydroquinone in a range of 8.0×10^-6-8.0×10^-4 mol/L was observed,and the detect limitation was 1.0×10^-6 mol/L.The recovery of hydroquinone to testing requirements was satisfactory.