Citation:
XIONG Le-Yan, ZHANG Nan, LI Xue-Ni, GUO Zan-Ru, ZHENG Long-Zhen. An Electrocatalyst Based on Carbon Nanotubes with a High Sensitivity for Detection of Reduced Glutathione[J]. Chinese Journal of Inorganic Chemistry,
;2016, 32(11): 1942-1950.
doi:
10.11862/CJIC.2016.225
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10-Methylphenothiazine/2-hydroxypropyl-β-cyclodextrin guest-host compounds were mixed with single-walled carbon nanotubes to give composite materials MPT-HP-β-CD/MWNT by a two-step method, which were characterized by FT-IR, UV-Vis, fluorescence spectroscopy, Raman spectrum and TEM. The applications of these composite materials toward the catalytic oxidation of glutathione (GSH) were demonstrated by cyclic voltammetry measurements. These results proved that the presence of MWNT could improve the electrical conductivity and catalytic activity of the composite material. The influences of the pH value, temperature, and scan rate on the catalyst activity were examined. These studies suggest that the MPT-HP-β-CD/MWNT composite materials could be used for the electrochemical detection of GSH with good stability and reproducibility and high sensitivity. The optimal detection concentration is 5×10-7~4.95×10-5 mol·L-1 and the detection limit is 3.96×10-8 mol·L-1 (S/N=3).
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