Ionic Liquids-Modified CaFe₂O₄/MWCNTs Nano-Hybrid as an Electrode Material for Detection of Carbendazim

Abstract

Ionic liquids modified CaFe2O4 magnetic nano-particles (MNPs) were synthesized, and a nano-hybrid of ILs-CaFe2O4 MNPs and MWCNTs are designed via a facile preparation method in order to fabricate a modified electrode. The modified electrode exhibits an obvious electrocatalytic activity toward the oxidation of bactericide carbendazim (CBZ). Based on the synergistic effect of ILs-CaFe2O4 MNPs and MWCNTs, the electrochemical trace-level detection of CBZ in paddy water and commercial fruits were realized. The impacts of experiment conditions on the electrochemical behavior of CBZ were studied. In addition, the sensor can be applied to quantification of CBZ in the concentration range of 3.14 × 10−8 to 1.05 × 10−5 mol L−1 and from 1.05 × 10−5 to 1.05 × 10−4 mol L−1 with a low detection limit of 9.41 × 10−9 mol L−1 (S/N = 3). Moreover, ILs-CaFe2O4/MWCNTs electrode showed good stability, high selectivity, and satisfactory anti-interference ability. Satisfactory results indicated that ILs-CaFe2O4/MWCNTs nano-hybrid is a promising sensing platform for the trace-level analysis of bactericide residue CBZ in agricultural crops and environment.

Anchoring Metallic MoS2 Quantum Dots over MWCNTs for Highly Sensitive Detection of Postharvest Fungicide in Traditional Chinese Medicines

“…The electrochemical behavior of MBC at various electrodes was evaluated via CV and SWV in phosphate buffer solution (pH = 7.0; 0.1 M), as shown in Figure . Basically, only one well-resolved electrochemical oxidation peak is observed for various modified electrodes, showing that the oxidation process is a quasi-reversible process (Figure a) . However, the electrochemical activity toward MBC oxidation varied with the modified materials (Figure b).…”

“…Basically, only one well-resolved electrochemical oxidation peak is observed for various modified electrodes, showing that the oxidation process is a quasireversible process (Figure 4a). 51 However, the electrochemical activity toward MBC oxidation varied with the modified materials (Figure 4b). The metallic MoS 2 QD-modified GCE shows poor electrochemical activity compared to bare GCE, which is attributed to the heavy aggregation of QDs.…”

Structural Insights on 2D Gadolinium Tungstate Nanoflake: A Promising Electrocatalyst for Sensor and Photocatalyst for the Degradation of Postharvest Fungicide (Carbendazim)

“…Currently, pesticides/fungicides have been widely used in the agricultural field to address food shortages. Among these pesticides, carbendazim (CBZ) is a colorless benzimidazolic ring-containing fungicide that shows a long-term activity for the protection of leaves, vegetables, fruits, and crops from fungi. , CBZ is widely applied in seed preplanting treatment and postharvest food storage. , The extensive application of CBZ in agriculture leads to dangerous risks to humans from plants . The high dosage of CBZ impairs the fertility and destroys the testicles of laboratory animals.…”

“…Among these pesticides, carbendazim (CBZ) is a colorless benzimidazolic ring-containing fungicide that shows a long-term activity for the protection of leaves, vegetables, fruits, and crops from fungi. 1,2 CBZ is widely applied in seed preplanting treatment and postharvest food storage. 3,4 The extensive application of CBZ in agriculture leads to dangerous risks to humans from plants.…”

Strategy for Simultaneous Determination of Droxidopa, Acetaminophen and Tyrosine Using Carbon Paste Electrode Modified with Graphene and Ethyl 2-(4-ferrocenyl-[1,2,3]triazol-1-yl) Acetate

“…Hence, to overcome this problem electrode modification is necessary. [35][36][37][38][39] Since the first experimental proof of graphene properties, such as excellent electronic conductivity, extremely large surface area, unique physical, chemical and mechanical properties, it has become the most interestingly studied topic in several fields. Graphene has been attracted great attention as an effective modifier in the electrochemistry, because of its faster charge transfer than the other modifier recently reported.…”