Journal
ELECTROANALYSIS
Volume 21, Issue 2, Pages 179-183Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200804444
Keywords
Carbon nanotubes; Chromium hexacyanoferrate; Amperometric sensor; H2O2; Electrocatalysis
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Funding
- National Natural Science Foundation of China [20675001]
- Anhui Provincial Natural Science Foundation [050460301]
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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 H2O2 and the amperometric responses show a linear dependence on the concentration of H2O2 in a range of 0.5 mu M to 10 mM (R = 0.9989). In addition, the sensor has good stability and reproducibility.
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