PEI/SiO2纳米粒子自组装修饰电极及六价铬离子的电化学发光分析方法研究  

Electrochemiluminescence analysis of chromium(Ⅵ)based on PEI/SiO_2 nanoparticles self-assemble modified electrode

作　　者：王艳[1] 张建怀[2] 郭志慧[1] 郑行望[1] 

机构地区：[1]陕西师范大学化学化工学院,陕西省生命分析化学重点实验室,陕西西安710119 [2]西北工业大学附属中学,陕西西安710072

出　　处：《陕西师范大学学报（自然科学版）》2016年第1期60-65,共6页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金(21375085)

摘　　要：利用反相微乳液方法合成了PEI/SiO2复合纳米粒子,通过透射电子显微镜(TEM)、Zeta电位对该复合纳米粒子进行了表征。该复合纳米粒子可以基于超分子作用自组装于Nafion/CNT修饰电极表面,并基于该修饰电极对铬酸根(CrO2-4)的富集效应及CrO2-4的电还原产物Cr(Ⅲ)对鲁米诺-H2O2化学发光体系强烈的催化作用,建立了一种高选择性的测定六价铬离子Cr(Ⅵ)的电化学发光新方法。PEI/SiO2nanoparticles were synthesized by the reverse micromulsion method, and the particles were characterized by TEM and Zeta potential. By self-assembling of the as-prepared composite nanoparticles on the Nafion/CNT film coated grapite electrode, a functional modified electrode could be obtained. Based on the strong enrichment ability of the functional modified e- lectrode to CrO42 and strong enhancement of Cr （Ⅲ） to chemiluminescence signal of luminol-H2 02 system, a highly selective ECL method for detecting Cr （Ⅵ） was developed.

关 键 词：PEI/SiO2纳米粒子修饰电极 CRO 检测 鲁米诺 电化学发光 

分 类 号：Q939.96[生物学—微生物学]