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Polyethylenimine Functionalized Multi‐walled Carbon Nanotubes for Electrochemical Detection of Chromium(VI)
Author(s) -
Peng Yuanping,
Wang Yangjuan,
Li Yijun,
He Xiwen
Publication year - 2016
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201501175
Subject(s) - polyethylenimine , thermogravimetric analysis , detection limit , carbon nanotube , materials science , chromium , scanning electron microscope , electrode , electrochemistry , field emission microscopy , glassy carbon , chemical engineering , composite number , carbon fibers , nuclear chemistry , nanotechnology , composite material , chemistry , cyclic voltammetry , metallurgy , chromatography , diffraction , transfection , optics , engineering , biochemistry , physics , gene
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.