聚乙烯亚胺
热重分析
检出限
碳纳米管
材料科学
铬
扫描电子显微镜
电极
电化学
场发射显微术
玻璃碳
化学工程
复合数
碳纤维
核化学
纳米技术
复合材料
化学
循环伏安法
冶金
色谱法
物理化学
衍射
工程类
物理
光学
基因
生物化学
转染
作者
Yuanping Peng,Yangjuan Wang,Yijun Li,Xiwen He
标识
DOI:10.1002/elan.201501175
摘要
Abstract Multi‐walled carbon nanotubes (MWCNTs) functionalized with polyethylenimine (PEI) were synthesized and characterized by dispersibility, field‐emission scanning electron microscope (FE‐SEM), FT‐IR and thermogravimetric Analyzer (TGA). The glassy carbon electrodes modified by MWCNT‐PEI composite were used for sensitive and selective detection of chromium (VI). A linear response was obtained over a wide range of Cr(VI) concentrations (0.002–20 µmol L −1 ) with the detection limit of 0.0006 µmol L −1 (S/N=3). The proposed electrodes were used successfully for Cr(VI) detection in three real water samples.
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