三聚氰胺基螯合树脂/碳纳米管修饰充蜡石墨电极阳极溶出伏安法测定铅和镉

doi:10.3724/SP.J.1095.2013.30106

摘要/Abstract

摘要： 采用超声法合成了三聚氰胺-甲醛-硫脲螯合树脂（MFT）,基于碳纳米管优良的光电性能，制备了MFT/纳米碳管复合物修饰充蜡石墨电极（MFT/MWCNTs/WGE）。采用场发射扫描电子显微镜及电化学技术表征了该修饰电极的特性。该电极被成功地用于水溶液中重金属离子Pb(Ⅱ)和Cd(Ⅱ)的同时测定，Pb(Ⅱ)和Cd(Ⅱ)的溶出峰电流与浓度分别在3×10-8～9×10-7 mol/L和5×10-8～7×10-7 mol/L的浓度范围内，呈良好的线性增长关系，Pd(Ⅱ)和Cd(Ⅱ)的检测限分别为2×10-9和3×10-9 mol/L（3σ）。

关键词: 超声合成, 三聚氰胺-甲醛-硫脲螯合树脂, 多壁碳纳米管, 充蜡石墨, 重金属离子

Abstract: Melamine-formaldehyde-thiourea chelating resin coated multi-walled carbon nanotube(MFT/MWCNTs) composite was prepared by ultrasonic method, and characterized by field emission scanning electron microscope and electrochemical techniques. The composite modified waxed graphite electrode(MFT/MWCNTs/WGE) was successfully applied to Pb(Ⅱ), Cd(Ⅱ) simultaneously screening. The striping peak current shows a good linear relationship in the concentration range of 3×10-8～9×10-7 mol/L for Pb(Ⅱ) and 5×10-8～7×10-7 mol/L for Cd(Ⅱ), with a detection limit of 2×10-9 and 3×10-9 mol/L(3σ) for Pb(Ⅱ) and Cd(Ⅱ), respectively.

Key words: ultrasonic synthesis, melamine-formaldehyde-thiourea chelating resin, multi-walled carbon nanotube, waxed graphite, heavy metal ions

中图分类号:

O657.1

徐思远, 雷平, 晋冠平. 三聚氰胺基螯合树脂/碳纳米管修饰充蜡石墨电极阳极溶出伏安法测定铅和镉[J]. 应用化学, DOI: 10.3724/SP.J.1095.2013.30106.

XU Siyuan, LEI Ping, JIN Guanping*. Determination of Pb(Ⅱ), Cd(Ⅱ) with Melamine Chelating Resin/Multi-walled Carbon Nanotubes Composites Modified Waxed Graphite Electrode[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2013.30106.

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