High entropy metal phosphide based electrochemical sensor for sensitive detection of carbendazim in fruits

Carbendazim (CBZ) is a broad-spectrum fungicide commonly used in horticulture and agricultural production, and is one of the main reasons for excessive pesticide residues in agricultural products. Continuous accumulation after ingestion by the human body can cause serious consequences such as poisoning. Therefore, it is necessary to develop electrochemical sensors with excellent detection performance for CBZ. Herein, we reported a facile synthesis of FeCoNiCrMnP high-entropy phosphide nanoparticles supported on electrospun carbon nanofibers (FeCoNiCrMnP/CNFs) by combining the electrospinning and phosphorus-vapor assisted graphitization process, overcoming the incompatibility between different metals and non-metals. The FeCoNiCrMnP/CNFs/GCE sensor exhibits excellent performance for CBZ (linear range of 0.1-30 mu M; detection limit of 0.7 nM) and reliable repeatability (RSD = 2.47 %). Moreover, the sensor has enormous potential in actual fruit CBZ analysis with its excellent performance.