| 壳聚糖-Nafion固载氯化血红素在水性介质中的电催化性能 |
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| 引用本文： | 杨昌英,周文凯,李敏,代忠旭,宿秀梅.壳聚糖-Nafion固载氯化血红素在水性介质中的电催化性能[J].三峡大学学报(自然科学版),2009,31(3):95-98. |
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| 作者姓名： | 杨昌英 周文凯 李敏 代忠旭 宿秀梅 |
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| 作者单位： | 三峡大学天然产物与利用湖北省重点实验室,湖北,宜昌,443002 |
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| 基金项目： | 湖北省自然科学基金创新群体项目，天然产物与利用湖北省重点实验室开放基金项目 |
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| 摘 要： | 采用壳聚糖（Cs）水溶胶体系，借助Nafion，将氯化血红素（Hm）修饰在金电极上，构建Cs—Hm-Nation／Au电极．在0．02MPBS（PH7．2）缓冲溶液中，通过循环伏安扫描，可以直接检测到Hm的氧化还原峰，还原峰电流与扫速的平方根成正比．考察了修饰电极对H2O2的催化还原及对H2O2氧化对苯二胺（PPDA）反应体系的催化作用．结果表明：Cs—Hm—Nation／Au电极可以催化H2O2的还原，电极的催化电流与H2O2浓度在一定范围呈线性响应．对H2O2-PPDA体系，Cs—Hm-Nation／Au电极可以检测到可逆的氧化还原峰，表明修饰电极可以实现PPDA被H2O2的可逆氧化，Hm起到了过氧化氢模拟酶的作用．
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| 关 键 词： | 氯化血红素 壳聚糖 电催化 H2O2 对苯二胺 |
Direct Electrochemistry and Electrocatalysis of Hemin Embedded in Chitosan-Nafion Films under Neutral Aqueous Conditions |
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| Yang Changying,Zhou Wenkai,Li Min,Dai Zhongxu,Su Xiumei.Direct Electrochemistry and Electrocatalysis of Hemin Embedded in Chitosan-Nafion Films under Neutral Aqueous Conditions[J].Journal of China Three Gorges University(Natural Sciences),2009,31(3):95-98. |
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| Authors: | Yang Changying Zhou Wenkai Li Min Dai Zhongxu Su Xiumei |
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| Institution: | Yang Changying Zhou Wenkai Li Min Dai Zhongxu Su Xiumei (Hubei Key Laboratory of Natural Products Research and Developement, China Three Gorges Univ., Yichang 443002, China) |
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| Abstract: | Direct electrochemical and electrocatalytic behavior of hemin immobilized on Au electrode through chitosan （Cs）-Nafion film is investigated. Heroin shows a well-defined CV behavior in 0.02 M pH 7.2 PBS. The stable Cs-Hm-Nafion/Au gives useful electrochemical catalytic responses to hydrogen peroxide. Moreover, the Cs-Hm-Nafion/Au electrode exhibits excellent enzyme-like electrocatalytic activities for the reaction system of H2O2＋ p-phenylenediamine （PPDA）. It is indicated that PPDA can be oxidated reversibly at the interface between Cs-Hm-Nafion/Au and aqueous buffer; and hemin exhibits H2O2 enzyme activity here. |
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| Keywords: | H2O2 |
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