Cu 2 MoS 4 Nanocatalyst-Based Electrochemical Sensor for Ofloxacin Electro-Oxidation: Delineating the Combined Roles of Crystallinity and Morphology on the Analytical Performance.

Autor: Huong Phung TL; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, 122300, Hanoi, Vietnam.; Phenikaa University Nano Institute (PHENA), Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam., Anh Nguyen T; Phenikaa University Nano Institute (PHENA), Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam., Dinh Ngo X; Phenikaa University Nano Institute (PHENA), Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam., Phan Vu N; Phenikaa University Nano Institute (PHENA), Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam.; Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam., Le LT; University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, 122300, Hanoi, Vietnam., Nguyen AD; University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, 122300, Hanoi, Vietnam., Le AT; Phenikaa University Nano Institute (PHENA), Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam.; Faculty of Materials Science and Engineering, Phenikaa University, 152351, Yen Nghia, Ha Dong, Hanoi, Vietnam.
Jazyk: angličtina
Zdroj: Chemistry, an Asian journal [Chem Asian J] 2024 Jun 17; Vol. 19 (12), pp. e202400166. Date of Electronic Publication: 2024 May 17.
DOI: 10.1002/asia.202400166
Abstrakt: In this study, we demonstrate the influence of crystallinity and morphology on the analytical performance of various Cu 2 MoS 4 (CMS) nanocatalysts-based electrochemical sensors for the high-efficiency detection of Ofloxacin (OFX) antibiotic. The electrochemical kinetics parameters including peak current response (Δ Ip ), peak-to-peak separation (Δ Ep ), electrochemically active surface area (ECSA), electron-transfer resistance (R ct ), were obtained through the electrochemical analyses, which indicate the single-crystalline nature of CMS nanomaterials (NMs) is beneficial for enhanced electron-transfer kinetics. The morphological features and the electrochemical results for OFX detection substantiate that by tuning the tube-like to plate-like structures of the CMS NMs, it might noticeably enhance multiple adsorption sites and more intrinsic active catalytic sites due to the diffusion of analytes into the interstitial spaces between CMS nanoplates. As results, highly single-crystalline and plate-shaped morphology structures of CMS NMs would significantly enhance the electrocatalytic OFX oxidation in terms of onset potential (E onset ), Tafel slope, catalytic rate constant (k cat ), and adsorption capacity (Γ). The CMS NMs-based electrochemical sensing platform showed excellent analytical performance toward the OFX detection with two ultra-wide linear detection concentration ranges from 0.25-100 and 100-1000 μM, a low detection limit of 0.058 μM, and an excellent electrochemical sensitivity (0.743 μA μM -1  cm -2 ).
(© 2024 Wiley-VCH GmbH.)
Databáze: MEDLINE
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