Voltammetric Oxidation of Ascorbic Acid Mediated by Multi-Walled Carbon Nanotubes/Titanium Dioxide Composite Modified Glassy Carbon Electrode
作者： Ganchimeg Perenlei , Wee Tee Tan , Nor Azah Yusof , Joo Kheng Goh
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摘要: A MWCNT/TiO2 composite was modified onto glassy carbon electrode and fabricated by mechanical attachment, then applied to detection of ascorbic acid using cyclic voltammetry. Electrode responses were obtained for the oxidation 0.5 mM at with MWCNT, TiO2, an unmodified electrode. well-defined highly resolved peak MWCNT/TiO2/GCE current enhancement potential shift toward origin being observed, this indicates evidence electrocatalytic process. In comparison other electrodes, observed enhancements 1.3 folds higher than those MWCNT/GCE 1.5 a bare The response revealed good linear relationship up 2.5 correlation coefficient 0.998. limit 4.0 μM found MWCNT/TiO2/GCE. Other usual parameters such as effect pH, scan rate, temperature, supporting electrolyte concentration studied.
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