A novel magnetic TiCT-MXene/FeO composite was prepared from TiCT and magnetic FeO. The characterizations by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) exhibited that the TiCT/FeO nanomaterial presented an outstanding conductivity and a large specific area, which could improve the electron transfer rate, leading to the amplification of the sensor's signal. Furthermore, an ultrasensitive molecularly imprinted electrochemical sensor based on MXene/FeO composites was fabricated for detecting methylmalonic acid (MMA) with high selectivity.
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