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Summary
Herein, a novel catechol sensor product of double-layers of functionalized multi-walled carbon nanotubes coated zinc oxide on a glassy carbon electrode (fMWCNTs/ZnO@fMWCNTs/GCE) is synthesized. The FTIR spectrum reveals that the ZnO NPs are efficiently functionalized on the fMWCNT whereas SEM evaluation exhibits granular colloids on the floor of ZnO@fMWCNTs nanocomposites. The XRD examine confirms the crystalline nature of the ZnO peaks and the ZnO interplay with fMWCNTs construction. The fabricated sensor responds to a large linear vary of CC concentrations from 10 µM to 200 µM and sensitivity of 0.0022 µA/µM.cm2 with a detection and quantification restrict of 0.027 µM and 0.092 µM, respectively. Each of the boundaries are higher than beforehand reported ZnO and fMWCNTs sensors. As well as, the developed fMWCNTs/ZnO@fMWCNTs/GCE demonstrates that the electron switch is regulated by the adsorption-controlled course of and may efficiently detect catechol in actual water samples with a superb selectivity in opposition to hydroquinone (HQ), phenol (ph), and penta-chlorophenol (p-chph). The developed sensor displays passable analytical efficiency together with operational stability of 94.5%, good repeatability with a relative customary deviation (RSD) of two.15%, and dependable reproducibility of 8 electrodes with an RSD of three.93%.
- Analysis Highlights
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An antifouling double-layered functionalized multi-walled carbon nanotubes (fMWCNTs) coated zinc oxide nanoparticles (ZnO NPs) is synthesized.
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The nanocomposite (fMWCNTs/ZnO@fMWCNTs) was fabricated utilizing a one-step in-situ adsorption technique.
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Within the new design of the fabricated nanocomposite, the diffusion of electrons is improved by the adsorption management mechanism.
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The developed sensor is very delicate and selective for sensing catechol.
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It displays steady and reproducible responses for sensible and actual evaluation of catechol.
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