Interfacial Superassembly of Mo2C@NiMn-LDH Frameworks for Electrochemical Monitoring of Carbendazim Fungicide

The large-scale usage of fungicides has been encountered with their manifestations in various agro-food products. This causes several detrimental impacts such as phytotoxicity and microbial resistance that affect different levels of ecological organization, which call for strict quantification of such toxic substances. In this work, we report the synthesis of molybdenum carbide (Mo2C) MXene on three-dimensional Globe Amaranth flower-like NiMn layered double-hydroxide (NiMn-LDH) petal arrays that are intercalated with the CO32- backbone via a sustainable, scalable, and facile synthetic hydrothermal route for the electrochemical detection of carbendazim (CBZ). The fabricated electrode favors enlarged active surface area, high electrical conductivity, rapid mass transport, and ion diffusion that enhance the electrochemical performance toward CBZ monitoring where the combined effects of NiMn-LDH and Mo2C provide improved electrochemical properties. Under optimum conditions, the Mo2C@NiMn-LDH-modified electrode delivers static characteristics such as wide dynamic linear response (0.001-232.14 mu M), low detection limit (0.2 nm)sensitivity (95.71 mu A mu M-1 cm(-2)), and good stability (30 cycles) and reproducibility (5 electrodes). We further demonstrate the interference-free sensing of CBZ by the Mo2C@NiMn-LDH sensor, suggesting its feasibility for practical applications in real-world samples with acceptable recovery ranges (water sample = +/- 97.50-99.43% and vegetable extract samples = +/- 98.20-99.86%).

Automated summary

A Mo2C@NiMn-LDH modified electrode was synthesized for the electrochemical detection of carbendazim, demonstrating improved performance characteristics. The electrode showed wide linear response range, low detection limit, high sensitivity, and good stability, making it suitable for practical applications in real-world samples.