电沉积普鲁士蓝／壳聚糖修饰金电极的电化学研究  

Electrochemical Behavior of Electrodeposited Prussian Blue/Chitosan Modified Gold Electrode

作　　者：汪学英[1,2] 邓克军[1] 屠一锋[1] 

机构地区：[1]苏州大学化学化工学院,分析化学研究所,苏州215123 [2]常熟理工学院化学系,常熟215500

出　　处：《分析化学》2008年第5期632-636,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.20675055)资助项目

摘　　要：应用控制电位电解法在金电极上进行了普鲁士蓝（PB）／壳聚糖（Cs）修饰膜的电沉积。在pH2、溶液组成为2．5mmol／LFeCl3＋2．5mmol／LK3[Fe（CN）6]＋0．01％Cs＋0．0lmol／LHCl和0．1mol／LKCl的溶液中，于0．4V（vs．SCE）电沉积300s，获得性能理想的沉积膜。对修饰膜进行了红外和显微表征，结果表明，PB和Cs同时沉积在电极上，且膜结构较纯PB沉积膜粗糙，修饰量大，具有更强的空间结构性。研究了PB／CS／金修饰电极（PB／CS／Au／CME）的电化学行为，该电极在中性（pH7．0～8．0）条件下性能比纯PB修饰膜更稳定，具有良好的电化学活性和对H2O2的电催化性能。氧化峰电流与H2O2浓度在1×10^-6～5×10^-3mol／L范围内呈良好线性关系，为研制基于酶催化反应的电化学生物传感器奠定了良好基础。The electrodeposition of Chitosan/Prussian Blue （CS/PB） films on gold electrode was carried out by potential controlled electrolysis. In solution containing 2.5 mmol/L FeCI3, 2.5 mmol/L K3 [ Fe（ CN）6 ], 0.01% CS, 0.01 mol/L HC1 and 0.1 mol/L KC1 of pH2, under the potential of 0.4 V（vs. SCE）, the perfect PB/CS film was obtained after deposition for 300 s. The modified film was characterized by FTIR and optical microscopy. The results showed that chitosan was co-deposited with Prussian blue on the electrode and the film was rough, more massive and more structural. The electrochemical behavior of CS/PB modified gold electrode were investigated. The PB/CS electrode was more stable than that of PB in solution of pH 7 to 8 with more strong electro-activity and has the excellent response on H2 02. A linear response was obtained in the wide concentration of H,O, in the range of 1 x 10^-6 -5 x 10^ -3moL/L.

关 键 词：普鲁士蓝 壳聚糖 电沉积 控制电位电解 化学修饰电极 过氧化氢 

分 类 号：O657.1[理学—分析化学] Q548.1[理学—化学]