Self-assembly of MoS2 nanosheet on functionalized pomelo peel derived carbon and its electrochemical sensor behavior toward taxifolin

MoS 2 nanosheet arrays grown on functional pomelo peel derived carbon (PPC) is constructed via in situ self-assembly method. The obtained MoS 2 /PPC composite is further used to fabricate electrochemical sensor for taxifolin detection. The current response of taxifolin on MoS 2 /PPC is significantly enhanced due to the synergistic effect between MoS 2 and PPC. It is found that the charge transfer impedance and the Ohmic resistance corresponding to MoS 2 /PPC are the lowest, indicating fast electron transfer rate and good conductivity. Further investigation reveals that the redox peak current is linearly related to the concentration of taxifolin in the range of 7 × 10 −8 –1 × 10 −5 mol·L −1 and the limit of detection is calculated to be 2.3 × 10 −8 mol·L −1 (S/N = 3). In addition, no obvious interfering phenomenonhas been observed in the detection process of taxifolin, demonstrating that MoS 2 /PPC presents good selectivity toward taxifolin determination.