Eutectic mixture-functionalized carbon nanomaterials for selective amperometric detection of nitrite using modified glassy carbon electrode

Abo-Hamad, Ali and AlSaadi, Mohammed AbdulHakim and Hashim, Mohd Ali (2018) Eutectic mixture-functionalized carbon nanomaterials for selective amperometric detection of nitrite using modified glassy carbon electrode. Journal of Electroanalytical Chemistry, 812. pp. 107-114. ISSN 1572-6657

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Official URL: https://doi.org/10.1016/j.jelechem.2018.01.052

Abstract

Choline chloride-urea (CU) (1:2 M ratio) was used to functionalize two types of carbon nanomaterials (CNMs); multiwall carbon nanotube (MWCNT) and graphene (Gr). A composite of both components was used to modify the surface of glassy carbon electrode (GCE) designated as (CU/MWCNT/Gr/GCE). CU-functionalized CNMs modified GCs have shown higher catalytic activity towards the oxidation of nitrite (NO2−) compared to bare and pristine CNM modified electrodes. However, the highest performance was found for a mixture of Gr and MWCNT (50% w/w). CU-functionalized CNMs were characterized by scanning electron microscope, Raman spectroscopy and X-ray diffraction. It has been hypothesized that covalent functionalization and exfoliation were responsible for the improvement in electrocatalytic activity of the modified electrode. CU/MWCNT/Gr/GCE presented a good stability, reproducibility with a detection limit 0.30 μM and a linear range between 5 μM–360 μM.

Item Type: Article
Uncontrolled Keywords: Carbon nanotube; Graphene; Functionalization; Deep eutectic solvent; Electrochemical sensor; Nitrite detection
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Oct 2019 02:33
Last Modified: 14 Oct 2019 02:33
URI: http://eprints.um.edu.my/id/eprint/22724

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