Photoelectrochemical Determination of Dopamine Based on Ionic Liquid/Bi2WO6
In this study,flower-like Bi2WO6 was prepared by hydrothermal method,and then the photoelectrochemical(PEC)for the detection of dopamine was developed based on IL/Bi2WO6/ITO photoelectrode.The structure and morphology of Bi2WO6 were characterized by X-Ray Diffraction(XRD)and scanning electron microscope(SEM).The detection performance of the sensor was studied by Amperometric i-t Curve(i-t)and Electrochemical impedance spectroscopy(EIS).Under the best conditions,the PEC sensor shows satisfactory selectivity,sensitivity and stability to dopamine.The PEC sensor has outstanding selectivity,sensitivity and stability for detection of dopamine and produces a linear response in the concentration range of 0.25～37.5 μmol/L.The detection limit was 0.093 μmol/L(S/N=3).
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