Simultaneous electrochemical determination of carbendazim and thiabendazole pesticides based on UiO-66(Zr)-NH-OC-MWCNT 3D coated glassy carbon electrode

• Published in: Journal of solid state electrochemistry 2024-11, Vol.28 (11), p.4273-4289
• Main Authors: Hazarika, Ranjit, Deffo, Gullit, Hussain, Nayab, Wamba, Honore Nogholesso, Saikia, Uddipana, Basumatary, Mwina, Dutta, Mridupavan, Dasgupta, Soumen, Njanja, Evangéline, Puzari, Panchanan
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemical sensors; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrochemistry; Electrodes; Electrolytic analysis; Electrons; Emission analysis; Energy Storage; Field emission microscopy; Field emission spectroscopy; Fourier transforms; Fungicides; Glassy carbon; Infrared analysis; Infrared spectroscopy; Metal-organic frameworks; Multi wall carbon nanotubes; Original Paper; Parameter sensitivity; Physical Chemistry; Reproducibility; Spectroscopic analysis; Spectrum analysis; Synthesis; Voltammetry; Zirconium
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-024-06039-6

The work reported herein describes the synthesis of a 3D material UiO-66(Zr)-NH-OC-MWCNT by combining a synthesized metal–organic framework UiO-66(Zr)-NH 2 and a carboxy functionalized multi-walled carbon nanotube MWCNT-COOH via an amide linkage and demonstrated its application for simultaneous electrochemical determination of two benzimidazole fungicides-carbendazim and thiabendazole. Different analytical techniques like Fourier transform infrared spectroscopy, X-ray diffraction analysis, Brunauer–Emmett–Teller analysis, and Field emission scanning electron microscopy were employed to characterize all the synthesized materials. The electrochemical characterization of the fabricated electrode was carried out using cyclic voltammetry and electrochemical impedance spectroscopy. Cyclic voltammetry and differential pulse voltammetry techniques have been used for the electroanalysis of carbendazim and thiabendazole. A limit of detection of 0.077 µM and 0.557 µM, respectively, have been obtained in the calibration range of 0.1 to 40 µM for carbendazim and 1 to 40 µM for thiabendazole, after optimization of several parameters which are susceptible to the sensitivity and selectivity of the developed sensor. Furthermore, with satisfactory results from the study of interferences, repeatability, and reproducibility, the proposed electrochemical sensor was successfully applied for analysis of carbendazim and thiabendazole in real samples. Graphical Abstract