Phoxim, extensively utilized in agriculture as an organothiophosphate insecticide, has the potential to cause neurotoxicity and pose human health hazards. In this study, an electrochemical enzyme biosensor based on TiC MXene/MoS@AuNPs/AChE was constructed for the sensitive detection of phoxim. The two-dimensional multilayer structure of TiC MXene provides a robust framework for MoS, leading to an expansion of the specific surface area and effectively preventing re-stacking of TiC MXene. Additionally, the synergistic effect of self-reduced grown AuNPs with MoS further improves the electrical conductivity of the composites, while the robust framework provides a favorable microenvironment for immobilization of enzyme molecules. TiC MXene/MoS@AuNPs electrochemical enzyme sensor showed a significant response to phoxim in the range of 1 × 10 M to 1 × 10 M with a detection limit of 5.29 × 10 M. Moreover, the sensor demonstrated excellent repeatability, reproducibility, and stability, thereby showing its promising potential for real sample detection.
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