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Amperometric Detection of Hydrogen Peroxide Using Glassy Carbon Electrodes Modified with Chromium Hexacyanoferrate/Single‐Walled Carbon Nanotube Nanocomposites
Author(s) -
Zhang Wei,
Wang Guangfeng,
Zhang Xiaojun,
Fang Bin
Publication year - 2009
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.200804444
Subject(s) - carbon nanotube , nanocomposite , amperometry , materials science , fourier transform infrared spectroscopy , glassy carbon , chemical engineering , scanning electron microscope , surface modification , electrochemistry , cyclic voltammetry , analytical chemistry (journal) , electrode , nanotechnology , chemistry , organic chemistry , composite material , engineering
Chemical functionalization of single‐walled carbon nanotubes (SWNTs) has constructed plenty of new structures with useful properties. But the modification was often confined to organic molecules, either by covalence or noncovalence. In this report, SWNTs were successfully functionalized with one kind of electroactive inorganic compounds: chromium hexacyanoferrate (Cr hcf ). The resulting Cr hcf /SWNTs nanocomposites were confirmed by Field‐emission scanning electron microscopy (FE‐SEM), transmission electron microscopy (TEM), UV‐vis absorption spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. Cr hcf crystallites are observed to be finely attached to the SWNTs. The electrochemical properties of Cr hcf /SWNTs nanocomposites were also investigated. The nanocomposites modified glassy carbon (GC) electrode shows high electrocatalytic activity towards the reduction of H 2 O 2 and the amperometric responses show a linear dependence on the concentration of H 2 O 2 in a range of 0.5 μM to 10 mM ( R =0.9989). In addition, the sensor has good stability and reproducibility.