电还原氧化石墨烯-铁氰化钴修饰电极对肼的测定  

Electrochemically Reduced Graphene Oxide and Cobalt Hexacyanoferrate Modified Electrode for Determination of Hydrazine

作　　者：李春香[1] 邱喜阳[1] 周建红[1] 令玉林[1] 邓克勤[1] 

机构地区：[1]理论有机化学与功能分子教育部重点实验室,湖南科技大学化学化工学院,湖南湘潭411201

出　　处：《分析科学学报》2015年第4期475-478,共4页Journal of Analytical Science

基　　金：国家自然科学基金(No.21471052);湖南省科技计划(No.2014FJ3048);湖南省教育厅资助项目(13C303);教育部重点实验室开放课题(No.LKF1306)

摘　　要：本文提出了一种新的水合肼的测定方法。利用静电作用,在氧化石墨烯(GO)表面吸附一层均匀分散的Co2+形成GO-Co2+复合物,通过恒电位法电还原复合物中的GO,再利用循环伏安法将吸附的Co2+转化为铁氰化钴(CoHCF),制得电还原的氧化石墨烯-铁氰化钴修饰玻碳电极(ERGO-CoHCF/GCE)。采用扫描电子显微镜(SEM)对修饰电极表面进行了表征。研究了水合肼在该修饰电极上的电化学行为及在不同电极上的电流响应。结果表明:ERGO-CoHCF/GCE对肼具有很好的电催化氧化作用,其浓度与氧化峰电流呈良好的线性关系。A novel determination method for hydrazine has been proposed.By electrostatic interaction,a well dispersed Co^2＋layer was adsorbed on the surface of graphene oxide（GO）to form the composite of GO-Co^2＋.The electrochemical reduced graphene oxide（ERGO）and cobalt hexacyanoferrate（CoHCF）modified glass electrode（ERGO-CoHCF/GCE）was prepared by the reduction of GO in the composite by potentiostatic method and transformation of Co^2＋as CoHCF by cyclic voltammetry.The surface of ERGOCoHCF/GCE was characterized with scanning electron microscopic techniques.The electrochemistry behavior of hydrazine on ERGO-CoHCF/GCE and current response on different electrodes was also studied.ERGO-CoHCF/GCE exhibited very high electrocatalytic activity toward hydrazine oxidation.The oxidation peak currents showed good linear relationships with concentration of hydrazine.It can be applied to detect hydrazine in samples.

关 键 词：铁氰化钴 氧化石墨烯 肼 电化学 

分 类 号：O657.1[理学—分析化学]