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

Abstract

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%).

Fabrication of Praseodymium Vanadate Nanoparticles on Disposable Strip for Rapid and Real-Time Amperometric Sensing of Arsenic Drug Roxarsone

“…Furthermore, the PrVO 4 -modified electrode has wide linear ranges of 0.001–551.78 μM, a low detection limit of 0.4 nM estimated based on a signal-to-noise ratio of 3 (S/N = 3), − and the sensitivity of 81.63 μA μM –1 cm –2 estimated as per the reported studies (Table ). The enhanced electrocatalytic behavior of the proposed sensor is owed to praseodymium Pr 3+ , for instance, is a possible rare-earth element with exceptional modes of electronic transitions and an unusual structure because of the existence of intestine empty space.…”

Surfactant-Assisted Synthesis of Praseodymium Orthovanadate Nanofiber-Supported NiFe-Layered Double Hydroxide Bifunctional Catalyst: The Electrochemical Detection and Degradation of Diphenylamine

“…29 A stable metal supported catalyst is produced by the well-assembled structure, tunable trivalent, and bivalent cation compositions by the simple and effective replacement of intercalated anions. 30 The fundamental qualities of LDH-based metal catalysts, such as wide surface area, charging and discharging nature, anion exchangeability, and environmental friendliness, make them beneficial for a variety of applications. 31 NiFe-LDH, in particular, is being researched extensively because to its superior electrocatalytic activity associated with the large number of active sites in its edges, compared to other LDHs described in the literature.…”

“…These components are arranged alternatively resulting in a stacked lamellar architecture . A stable metal supported catalyst is produced by the well-assembled structure, tunable trivalent, and bivalent cation compositions by the simple and effective replacement of intercalated anions . The fundamental qualities of LDH-based metal catalysts, such as wide surface area, charging and discharging nature, anion exchangeability, and environmental friendliness, make them beneficial for a variety of applications .…”

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

“…The electrochemical performance of a sensor strongly depends on the electrocatalysts of the electrodes. − The combination of distinctive nanostructured transition-metal oxides and post-transition-metal oxides has driven significant interest due to their versatile applications such as antibacterial, drug delivery, sensing, and environmental remediation. − The spinel phase mixed-metal oxide AB 2 O 4 has attracted growing attention because of its chemical composition. The cationic sharing of A and B cations’ valency can change the oxidation states, which are of substantive influence on the physical and chemical properties of the spinel metal oxides. − Among the spinel, structured metal oxides, the p-type semiconductor copper bismuthate (CuBi 2 O 4 ; CBO) has been conventionally used in various fields due to its exceptional characteristic features such as narrow band-gap, appropriate band positions, and low cost.…”