Ferricyanide/RGO/PDDA纳米复合物的制备及其对抗坏血酸的电催化  

Preparation of Ferricyanide/RGO/PDDA Nanocomposites and Its Catalysis for Ascorbic Acid

作　　者：焦守峰[1] 金晶[2] 王伦[2] 

机构地区：[1]淮北职业技术学院,安徽淮北235000 [2]安徽师范大学,安徽芜湖241000

出　　处：《安徽师范大学学报（自然科学版）》2016年第5期441-444,448,共5页Journal of Anhui Normal University(Natural Science)

基　　金：国家自然科学基金(21075002);安徽省教育厅高校自然科学研究项目(KJ2014A652)

摘　　要：通过静电作用将带负电并具有电活性的铁氰酸根离子固定到预先制备好的RCO/PDDA纳米复合物修饰玻碳电极上.继而研究了该修饰电极的电化学性质,发现铁氰酸根离子作为电子媒介体,对抗坏血酸有良好的电催化作用.而且氧化电位只有0.08V,远远低于其它类型的电化学传感器.在优化后的p H条件下将其应用于实际样品的分析检测,有很好的重现性和快速的电流效应.A novel electro-active material was successfully prepared with ferricyanide ions loaded by electrostatic interaction onto the layer of prepared RCO-PDDA. Further,an electrochemical sensor for use in ascorbic acid( AA) detection was constructed with the use of the above electro-active materials Ferricyanide / PDDA / RCO)matrixasanelectronmediator.TheelectrocatalyticoxidationofAAbyferricyanidewasobserved at the potential of 0. 08 V,which was negative shift compared with that by direct electrochemical oxidation of AA on a glassy carbon electrode. The experimental parameters,including the p H value of testing solution and the applied potential for detection of AA,were optimized. The current electrochemical sensor not only exhibited a good reproducibility and storage stability,but also showed a fast amperometric response to AA.

关 键 词：电化学传感器 石墨烯 纳米复合物 电催化氧化 生物传感器 电子媒介体 

分 类 号：O657.1[理学—分析化学]