2,4,6-三硝基苯酚在掺杂了铕(Ⅲ)离子的类普鲁士蓝膜修饰的玻碳电极上的电催化还原反应
On the Electro-catalytic Reduction of 2,4,6-Trinitrophenol at the Glassy Carbon Electrode Modified with Analogous Prussian Blue Film Doped with Europium(Ⅲ) Ion
摘 要
制备了用掺杂铕(Ⅲ)离子的类普鲁士蓝膜修饰的玻碳电极,并研究了2,4,6-三硝基苯酚在此修饰电极上的电化学行为.试验结果表明:与裸玻碳电极相比,2,4,6-三硝基苯酚在此修饰电极上的还原峰电流显著提高,还原电位大大降低,且工作曲线的线性范围明显增宽.在此基础上提出了一种高灵敏度直接测定2,4,6-三硝基苯酚的伏安测定法.在优化的条件下,测得特征还原峰的电流值与2,4,6-三硝基苯酚浓度在4.0×10-5~2.0×10-3mol·L-1及2.0×10-7~8.0×10-6mol·L-1范围内呈线性关系,方法的检出限(3σ)为6.0×10-8mol·L-1.以黄河水样作为基体,用标准加入法做回收试验,测得回收率在97.7%~103.3%之间.
化学修饰电极
2,4,6-三硝基苯酚
铕(Ⅲ)离子掺杂的类普鲁士蓝膜
Voltammetry
Chemically modified electrode
2,4,6-Trinitrophenol
Analogous prussian blue film doped with Europium(Ⅲ) ion
Abstract
A glassy carbon electrode modified with analogous prussian blue film doped with Eu3+ ion was prepared and the electrochemical behavior of 2,4,6-trinitrophenol at the modified carbon glassy electrode was studied.It was shown by the experimental results,as compared with the use of bare glassy carbon electrode,remarkable raising of reductive peak current,lowering of reductive potential and broadening of range of working curve of 2,4,6-trinitrophenol were observed at the modified electrode.Based on these facts,a sensitive method for direct determination of 2,4,6-trinitrophenol by voltammetry was proposed.Linear relationships between values of characteristic reductive current and concentration of 2,4,6-trinitrophenol were obtained in the ranges of 4.0×10-5 to 2.0×10-3mol·L-1 and 2.0×10-7 to 8.0×10-6mol·L-1,with its detection limit (3σ) of 6.0×10-8mol·L-1.By taking water sample from the Huanghe river as matrix,recovery of the method was tested by standard addition method,giving values of recovery in the range from 97.7% to 103.3%.
中图分类号 O657.14
所属栏目 工作简报
基金项目 甘肃省自然科学基金(No.3ZS051-A25-097)资助
收稿日期 2007/12/29
修改稿日期
网络出版日期
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备注付周周(1979-),男,甘肃兰州人,硕士研究生,主要研究方向为环境电化学.
引用该论文: FU Zhou-zhou,REN Xiao-na,ZHOU Xiu-ying,SONG Qing-yun,ZHOU Min,MA Yong-jun. On the Electro-catalytic Reduction of 2,4,6-Trinitrophenol at the Glassy Carbon Electrode Modified with Analogous Prussian Blue Film Doped with Europium(Ⅲ) Ion[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2009, 45(3): 270～272
付周周,任小娜,周秀英,宋青云,周敏,马永钧. 2,4,6-三硝基苯酚在掺杂了铕(Ⅲ)离子的类普鲁士蓝膜修饰的玻碳电极上的电催化还原反应[J]. 理化检验－化学分册, 2009, 45(3): 270～272
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【2】Wise H E,Fahrenthold P D.Predicting priority pollutants from petrochemical processes[J].Environ Sci Technol,1981,15(11):1292-1304．
【3】Lüttke J,Scheer V,Levsen K,et al.Occurrence and formation of nitrated phenols in and out of cloud[J].Atmos Environ,1997,31(16):2637-2648．
【4】WU Ping,LU Shan,CAI Chenxin.Electrochemical preparation and haracterization of a samarium hexacyanoferrate modified electrode[J].Journal of Electroanalytical Chemistry,2004,596:143-150．
【5】LIU Shouqing,CHEN Hongyuan.Spectroscopic and voltammetric studies on a lanthanumhexacyanoferrate modified electrode[J].Journal of Electroanalytical Chemistry,2002,528:190-195．
【6】吴萍,蔡称心,陆天虹.铁氰化钐修饰电极的制备、表征及电催化[J].应用化学,2004,21(11):1101-1104．
【7】周秀英,周敏,付周周,等.铕离子掺杂类普鲁士蓝化学修饰电极对三联吡啶钌(Ⅱ)的电催化氧化研究[J].西北师范大学学报:自然科学版,2007,43(1):54-58．
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