Amperometric sensing of nitrite based on electroactive ferricyanide-poly(diallyldimethylammonium)-alginate composite film
Amperometric sensing of nitrite based on electroactive ferricyanide-poly(diallyldimethylammonium)-alginate composite film
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基于电活性铁氰化物-聚二烯丙基二甲基铵-海藻酸盐复合膜的亚硝酸盐电流传感
DOI：
10.1016/j.snb.2013.01.052
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发表时间：
2013-05-01
影响因子：
8.4
通讯作者：
Yao, Shouzhuo
中科院分区：
文献类型：
--
作者：
Qin, Cong;Wang, Wen;Yao, Shouzhuo
将聚二烯丙基二甲基氯化铵（PDDA）和海藻酸钠（AlgNa）通过静电相互作用制备成水不溶性互穿聚合物复合物，然后将其涂敷在Au电极表面，再将K3 Fe（CN）（6）固定在电极表面，得到电活性稳定的K3 Fe（CN）（6）-PDDA-Alg/Au电极。通过目视检查和电化学方法研究了相互作用过程和电极修饰。在优化的条件下，K3 Fe（CN）（6）-PDDA-Alg/Au电极能有效地电催化还原酸性水溶液中的亚硝酸根，其线性检测范围为5.0 μ M ~ 9.7 mM，灵敏度为83.7 μ A cm（-2）mM（-1），是目前报道的最佳亚硝酸根检测结果之一。将该电极用于真实的样品基体中亚硝酸根的电分析，结果令人满意。(C)2013 Elsevier B. V.保留所有权利。
Poly(diallyldimethylammonium chloride) (PDDA) and sodium alginate (AIgNa) were mixed to obtain a water-insoluble interpenetrating polymer composite via electrostatic interaction and then cast on an Au electrode surface, followed by robust immobilization of K3Fe(CN)(6) to yield a K3Fe(CN)(6)-PDDA-Alg/Au electrode of stable electroactivity. The interaction processes and electrode modification are studied by visual inspection and electrochemical methods. Under optimized conditions, the K3Fe(CN)(6)-PDDA-Alg/Au electrode can efficiently electrocatalyze the reduction of nitrite in acidic aqueous solution and give a linear nitrite-detection range of 5.0 mu M to 9.7 mM with a sensitivity of 83.7 mu A cm(-2) mM(-1), which is amongst the best results reported for nitrite sensing. The electrode was also used for nitrite electroanalysis in real sample matrices with satisfactory results. (C) 2013 Elsevier B.V. All rights reserved.