Polyethylenimine Functionalized Multi‐walled Carbon Nanotubes for Electrochemical Detection of Chromium(VI). Issue 9 (13th April 2016)

• Record Type: Journal Article
• Authors: Peng, Yuanping; Wang, Yangjuan; Li, Yijun; He, Xiwen
• Is Part Of: Electroanalysis. Volume 28:Issue 9(2016)
• Page Start: 2029
• Page End: 2036
• Publication Date: 2016-04-13
• Subjects: MWCNT-PEI composite -- Chromium (VI) -- amperometry; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201501175
• Languages: English
• ISSNs: 1040-0397

Abstract

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. Abstract :