电化学法制备电还原的氧化石墨烯-铁氰化镍修饰电极检测亚硝酸根  

The preparation of an electro-reduced graphene oxide and nickel hexacyanoferrate modified electrode by direct electrochemical method and its application for determination of nitrite

作　　者：李春香[1] 邱喜阳[1] 周建红[1] 邓克勤[1] 

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

出　　处：《分析试验室》2014年第11期1241-1244,共4页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(21471052);湖南省科技计划项目(2014F53048);教育部重点实验室开放课题(LKF1306)资助

摘　　要：通过静电作用,在氧化石墨烯(GO)表面吸附一层均匀分散的Ni2+形成GO-Ni2+复合物,利用循环伏安法,把GO-Ni2+修饰电极上的Ni2+转化为铁氰化镍(Ni HCF),再通过电还原制备电还原的氧化石墨烯-铁氰化镍修饰的玻碳电极(ERGO-Ni HCF/GCE)。采用扫描电子显微镜(SEM)对其表面结构进行了表征。研究了NO-2在不同修饰电极上的电化学行为,ERGO-Ni HCF/GCE对NO-2的氧化反应有很好的电催化活性,NO-2的浓度与其氧化峰电流呈良好的线性关系。A novel determination method for nitrite has been proposed. By electrostatic interaction, the well dispersed Ni^2＋ layer was adsorbed on the surface of graphene oxide （GO） to form the composite of GO-Ni^2＋ The Ni^2＋ on the GO-Ni^2＋ modified electrode was transformed as nickel hexacyanoferrate （NiHCF） by cyclic voltammetry. GO was reduced by electrochemical method in situ to obtain electrochemically reduced graphene oxide （ERGO） and NiHCF modified glassy carbon electrode （ERGO-NiHCF/GCE）. It was characterized with scanning electron microscopic techniques （SEM）. The electrochemical behavior of nitrite on different modified electrodes was also discussed. It was shown that ERGO-NiHCF/GCE had very high electrocatalytic activity toward nitrite oxidation and the oxidation peak current had good linear relationship with concentration of nitrite.

关 键 词：氧化石墨烯 铁氰化镍 亚硝酸根 电化学 

分 类 号：O657.1[理学—分析化学]