The electron transfer and electrocatalytic proiperties of iron oxide nanoparticle (g-Fe2O3) catalysts supported on MWCNTs are described. The MWCNT-Fe2O3 and its electrodes were successfully characterised with FESEM, HRTEM, XRD, EDX, cyclic voltammetry and electrochemical impedance spectroscopy. The MWCNT-Fe2O3 based electrodes demonstrated fastest electron transport and current response towards DA compared to other electrodes studied, giving a catalytic rate constant of 16.4 x 105 cm3mol-1s-1, sensitivity of 0.026 AM-1 and limit of detection of 3.3 x 10-7 M. The electrode may be potentially useful for the detection of DA in real drug sample analysis.
Reference:
Adekunle, AS and Ozoemena, KI. 2010. Voltammetric and impedimetric properties of nano-scaled -Fe2O3 catalysts supported on multi-walled carbon nanotubes: catalytic detection of dopamine. International Journal of Electrochemical Science, Vol. 5, pp 1726-1742
Adekunle, A., & Ozoemena, K. (2010). Voltammetric and impedimetric properties of nano-scaled -Fe2O3 catalysts supported on multi-walled carbon nanotubes: catalytic detection of dopamine. http://hdl.handle.net/10204/4939
Adekunle, AS, and KI Ozoemena "Voltammetric and impedimetric properties of nano-scaled -Fe2O3 catalysts supported on multi-walled carbon nanotubes: catalytic detection of dopamine." (2010) http://hdl.handle.net/10204/4939
Adekunle A, Ozoemena K. Voltammetric and impedimetric properties of nano-scaled -Fe2O3 catalysts supported on multi-walled carbon nanotubes: catalytic detection of dopamine. 2010; http://hdl.handle.net/10204/4939.
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