Synthesis and Characterization of Chromium Hexacyanoferrate/Multiwalled Carbon Nanotube Composite and Its Biosensing for L‐Cysteine |
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| Authors: | Rongxing Shen Xiangzi Li Guilin Lium Yulan Ji Guangfeng Wang Bin Fang |
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| Institution: | 1. Anhui Key Laboratory of chemo‐Biosening, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.?R. China. fax: +86‐553‐3869303;2. tel.: +86 553?3869302;3. College of Chemisty and Chemical engineering, Anhui University, Hefei 230039, P.?R. China.;4. Department of Pharmacy, Anhui College of Chinese Traditional Medicine,Wuhu 241000, P.?R. China |
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| Abstract: | This work describes the electrochemical properties of glassy carbon electrodes (GCE) modified with chromium(III) hexacyanoferrate(II) (Crhf) nanoparticles attached multiwalled carbon nanotube (MWNTs). The morphological characterization of Crhf/MWNTs nanocomposites was examined by scanning electron microscopy (SEM), UV‐vis spectroscopy, and Fourier transform infrared spectrometry (FT‐IR). The electrocatalytic activity of these nanocomposites was investigated and showed a good electrocatalytic effect for oxidation of L ‐cysteine (L ‐Cys) in 0.1 M phosphate buffer solution (pH 3.0). Under optimum conditions linear calibration graphs were obtained over the L ‐Cys concentration range 5.0×10?7 to 6.0×10?5 M with a correlation coefficient of 0.9998 and a detection limit (signal‐to‐noise ratio was 3) of 1.0×10?8 M. The proposed method is simple and it also showed excellent sensitivity and stability. The excellent electrocatalytic ability of the modified electrode towards L ‐Cys manifests that the Crhf/MWNTs can provide a new platform for biosensors and other biology. |
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| Keywords: | L‐Cysteine Electrocatalysis Glassy carbon electrodes Biosensors |
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