An electrochemical sensor founded on heterogeneous MXene & MOF composite for tanshinol sensing

A new kind of electrochemical sensor based on the MXene & MOF composite-modified carbon cloth was prepared firstly by self-assembly through hydrogen bonds, and then by air-annealing process for detection. The preparation processing introduced chemical bonds between MXene and MOF, which remarkably enhanced the electron transfer ability. Accordingly, combing the unique features of MXene and MOF themselves, the novel electrochemical sensor exhibited exceptional performance to detect tanshinol. Via differential pulse voltammetry, we could obtain a linear tanshinol concentration range of 0.08–8 μM and the limit of detection is 0.034 μM. Furthermore, this developed electrochemical sensor could determine concentrations of tanshinol in real Chinese herbal samples, confirming its practicability and reliability.