A cerium-metal organic framework/carbon black(Ce-MOF/CB)nanocomposit was prepared and modified on the surface of a glassy carbon electrode(GCE)for the electrochemical determination of 5-hydroxytryptamine(5-HT).The scanning electron microscope(SEM),energy dispersive X-ray spectroscopy(EDS),and fourier transform infrared spectroscopy(FTIR)were chosen for the characterization of the composite.The electrochemical experimental results indicate that Ce-MOF/CB nanocomposite has good electrocatalytic activity for the electrochemical oxidation of 5-HT.The oxidation peak currents are linear to the concentration of 5-HT from 6.77×10-8 to 1.00×10-5 mol∙L-1.The detection limit(LOD)was down to 1.00×10-8 mol∙L-1(signal-to-noise ratio S/N=3).
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