...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electroanalysis >Electrochemical preparation of brilliant-blue-modified poly(diallyldimethylammonium chloride) and Nafion-coated glassy carbon electrodes and their electrocatalytic behavior towards oxygen and L-cysteine
【24h】

Electrochemical preparation of brilliant-blue-modified poly(diallyldimethylammonium chloride) and Nafion-coated glassy carbon electrodes and their electrocatalytic behavior towards oxygen and L-cysteine

机译：亮蓝色修饰的聚二烯丙基二甲基氯化铵和Nafion涂层玻璃碳电极的电化学制备及其对氧和L-半胱氨酸的电催化行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Brilliant blue FCF-modified glassy carbon electrodes have been prepared by cycling the Nafion (or poly(diallyldimethylammonium chloride) (PDDAC)) coated electrodes repeatedly 15 cycles in brilliant blue FCF (BB FCF) dye solution. The BB FCF molecules are incorporated into Nafion coating by cycling the film-covered electrode between +0.3 to 1.2 V (vs. Ag/AgCl) in pH 1.5 BB FCF solution while PDDAC-coated electrode cycled between 0 to - 1.0 V (vs. Ag/AgCl) in pH 6.5 BB FCF solution to immobilize the dye. Electrostatic interaction between dye molecule and PDDAC was predominant in PDDAC coating whereas immobilization of dye in Nafion film attributed to the combined effect of electrostatic and hydrophobic interactions. ne voltammetric features of BB FCF-modified electrodes resemble that of surf ace-confined redox couples. The peak potentials of BB FCF-incorporated PDDAC-coated electrode were shifted to more positive potential region with decreasing pH of contacting solution. BB FCF-modified electrodes showed electrocatalytic activity towards reduction of oxygen and oxidation of L-cysteine with significant decease of overvoltage compared to unmodified electrode. The BB FCF-modified Nafion-coated electrode was tested for its analytical applications toward determination of L-cysteine. The linear range of calibration plot at BB FCF-modified Nafion-coated electrode is 10 to 100 mu M, which coincides with L-cysteine levels in biological fluids. Sensitivity and detection limit of the electrode are 111 nA mu M-1 and 0.5 mu M, respectively.
机译：明亮的蓝色FCF修饰的玻璃碳电极已通过将Nafion（或聚（二烯丙基二甲基氯化铵）（PDDAC））涂覆的电极在亮蓝色FCF（BB FCF）染料溶液中重复循环15次来制备。通过在pH 1.5 BB FCF溶液中使覆膜电极在+0.3至1.2 V（vs.Ag/AgCl）之间循环，将BB FCF分子掺入Nafion涂层中，而涂覆PDDAC的电极在0至-1.0 V（vs. Ag / AgCl）在pH 6.5 BB FCF溶液中固定染料。染料分子与PDDAC之间的静电相互作用在PDDAC涂层中占主导地位，而染料在Nafion膜中的固定化则归因于静电和疏水相互作用的共同作用。 BB FCF修饰电极的伏安特征与表面约束氧化还原对相似。随着接触溶液pH值的降低，结合了BB FCF的PDDAC涂层的电极的峰值电势移到了更大的正电势区域。与未修饰的电极相比，BB FCF修饰的电极表现出对氧还原和L-半胱氨酸氧化的电催化活性，过电压的显着降低。测试了BB FCF修饰的Nafion涂层电极在测定L-半胱氨酸方面的分析应用。 BB FCF修饰的Nafion涂层电极的校准曲线的线性范围为10至100μM，与生物液体中的L-半胱氨酸水平相符。电极的灵敏度和检测极限分别为111 nAμM-1和0.5μM。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号