Synthesis of a novel nanocomposite of CoTMPyP/Ti3C2 (MXenes) for catechol detection

A novel electrochemical sensor based on titanium carbide (Ti 3 C 2 ) and cobalt porphyrin (CoTMPyP) nanocomposite was developed to detect catechol (CC). X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) methods were used to characterize the CoTMPyP/Ti 3 C 2 nanocomposite and illuminate the electrochemical oxidation process, as well as electrochemical techniques such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) were measured. The results indicate that the introduction of CoTMPyP greatly enhanced the electron transfer capability and maintained high stability, good reproducibility, and interference resistance. Moreover, it has a lower detection limit (2.5 μM) in the range of 5–268 μM and has greater application potential in the detection of CC. Hence, Ti 3 C 2 nanocomposites are considered as a candidate material for combination with carbon materials and have potential applications in environmental analysis and catechol detection. Graphical abstract