Chloride chemical sensor based on an organic conducting polypyrrole polymer
Chloride chemical sensor based on an organic conducting polypyrrole polymer
复制标题
基于有机导电聚吡咯聚合物的氯化物传感器
作者：
S. Dong;Zhisheng Sun;Ziling Lu
研究了氯化物掺杂聚吡咯 (PPy) 聚合物薄膜电极对溶液中氯离子的电位响应行为。讨论了聚合条件对潜在响应特征和响应机制的影响。制备了基于导电 PPy 聚合物薄膜的氯离子选择性电极，其电位响应斜率为 58–60 mV (pCl–)–1，Cl– 的检测限为 3.5 × 10–5M。电极制备的最佳条件为：吡咯(Py)，0.05~0.2 M；氯化锂，0.1–1 M；电化学聚合扫描范围，0.5–1.2 V；聚合时间，10-30分钟；扫描速率为 20–100 mV s–1。该化学传感器响应快、电阻低、易于制备、不易中毒。
The potential response behaviour of a chloride doped polypyrrole (PPy) polymer film electrode to chloride ion in solution has been examined. The effect of the polymerisation conditions on the characteristics of the potential response and response mechanism is discussed. A chloride ion-selective electrode based on a conducting PPy polymer film was prepared with a potential response slope of 58–60 mV (pCl–)–1 and a detection limit of 3.5 × 10–5M of Cl–. The optimum conditions for the preparation of the electrode were: pyrrole (Py), 0.05–0.2 M; LiCl, 0.1–1 M; scan range for electrochemical polymerisation, 0.5–1.2 V; polymerisation time, 10–30 min; and scan rate, 20–100 mV s–1. The chemical sensor has a fast response, a low resistance, is easy to prepare and is not susceptible to poisoning.