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 CO3
2– 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 μM),
low detection limit (0.2 nM), higher sensitivity (95.71 μA μM–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%).