Pt-Fe(Ⅲ)/PAni/GCE电极的制备及NO^(2-)的测定  

Preparation of Pt-Fe(Ⅲ)/PAni/GCE Electrode and Determination of NO_2^-

作　　者：郝玉翠[1] 李秀荣[2] 吴楠[1] 郝玉兰[3] 周立军[4] 

机构地区：[1]唐山学院环境与化学工程系,河北唐山063000 [2]唐山学院学报编辑部,河北唐山063000 [3]华北煤炭医学院预防医学系,河北唐山063000 [4]唐钢炼焦制气厂,河北唐山063039

出　　处：《化工环保》2010年第6期544-548,共5页Environmental Protection of Chemical Industry

摘　　要：采用电化学沉积法制备了负载Pt微粒和Fe(Ⅲ)的聚苯胺修饰玻碳电极(Pt-Fe(Ⅲ)/PAni/GCE)。通过循环伏安法研究了NO_2^-在该电极上的电化学行为,并优化了实验参数,在此基础上建立了一种用伏安法直接测定NO_2^-的方法。在酸性溶液中,NO_2^-的氧化峰电流与其浓度在5.0×10^(-7)～2.0×10^(-3)mol/L的范围内呈良好的线性关系,相关系数为0.999 6,检出限为4.0×10^(-7)mol/L。采用本方法测定NO_2^-具有较高的灵敏度和较好的重现性。The Pt particle-Fe （ Ⅲ） loaded and polyaniline modified glassy carbon electrode （ Pt-Fe （Ⅲ）/PAni/GCE） was prepared by electrochemical deposition method. The electrochemical behaviors of NO2 on Pt-Fe （Ⅱ ）/PAni/GCE were studied by cyclic voltammetry. The experimental parameters were optimized, and a voltammetric method for direct determination of NO2^- was developed. In acidic solution, the oxidation peak current of NO2^- is proportional to the NO2^- concentration in the range of 5.0×10^-7～2.0×10^-3mol/L, the correlation coefficient is 0. 999 6, and the detection limit is 4.0 ×10^-7 mol/L. The method for NO~ determination has a higher sensitivity and a better repeatability.

关 键 词：铂微粒 三价铁 聚苯胺 修饰电极 亚硝酸根 

分 类 号：X83[环境科学与工程—环境工程]