A novel kaempferol electrochemical sensor based on glass carbon electrode modified by poly (3, 4-ethylenedioxythiophene) decorated with green synthesized MIL-100(Fe)-multi- walled carbon nanotubes composites

Kaempferol (KA) belongs to the group of flavonoids with versatile biological activities, which has attracted much attention. Herein, a novel KA electrochemical sensor was proposed based on glass carbon electrode modified with MIL-100(Fe)-multi-walled-carbon nanotubes/poly(3,4-ethylenedioxythiophene) (MIL-100(Fe)-MWCNTs/PEDOT) composite, which were characterized by X-ray diffraction spectroscopy and scanning electron microscopy. MWCNTs decorated with in situ green synthesized MIL-100(Fe) showed excellent electrochemical sensing performance. For detecting KA with DPV model, the MIL-100(Fe)-MWCNTs/PEDOT/GCE showed a linear range of 50–1950 nM under optimal conditions, and the corresponding detection limit (LOD) was 13.2 nM (S/N = 3). In addition, the sensor exhibited satisfactory sensitivity and accuracy for detecting KA in real samples (XinDaKang tablet).