多壁碳纳米管-[BMIM]PF_6修饰电极测定Hg^(2+)  

Detection of Hg(Ⅱ) by Multi-walled Carbon Nanotube-Ionic Liquid Modified Electrode

作　　者：任旺[1] 张英[1] 喻杰[1] 

机构地区：[1]四川理工学院化学与制药工程学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2011年第6期640-642,共3页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：四川省教育厅基金项目(10ZB102);四川理工学院科研项目(2009XJKY1001)

摘　　要：制备了多壁碳纳米管(MWCNT)-离子液体([BMIM]PF6)修饰电极并作为工作电极,采用阳极溶出伏安法检测Hg2+。研究表明,Hg2+在修饰电极上可得到灵敏的溶出峰。考察了实验条件对Hg2+在该修饰电极上溶出伏安行为的影响。在优化的实验条件下,Hg2+在1.0×10-6mol/L～1.0×10-4mol/L浓度范围内与其溶出峰电流呈良好的线性关系,相关系数为0.9992,检出限为1.0×10-7mol/L。该修饰电极制备简单,用于微量汞的检测,效果良好。The modified electrode is prepared by coating the mixture of multi-walled carbon nanotube particles(MWCNT) and the ionic liquid(PF6) on the glassy carbon electrode surface.The sensitive anodic stripping peak of Hg(Ⅱ) is obtained at the modified electrode.The experimental condition's effect on Hg2+ in this modified electrode stripping voltammetric behavior is studied.Under the optimum conditions,stripping peak current of Hg(Ⅱ) has good linearity with concentration in the range of 1.0 ×10-6～1.0×10-4mol/L,and the detection limit is 1.0×10-7 mol/L.The modified sensor is easy to prepare and can be use for determination of trace Hg(Ⅱ) and is of good performance.

关 键 词：多壁碳纳米管 离子液体 修饰电极 阳极溶出 Hg2+ 

分 类 号：O65[理学—分析化学]