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Article

Highly Sensitive Non-Enzymatic Detection of Glucose at MWCNT-CuBTC Composite Electrode

1
Department of Applied Chemistry and Engineering of Inorganic Compounds and Environment, Politehnica University of Timisoara, Blv. Vasile Parvan No. 6, 300223 Timisoara, Romania
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“Coriolan Dragulescu” Institute of Chemistry Timisoara of Romanian Academy, Mihai Viteazu 24, 300223 Timisoara, Romania
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Catalysis Engineering, Chemical Engineering Department, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
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Advanced Catalytic Materials, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
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Department of Dermatology and Venereology, “Victor Babeș” University of Medicine and Pharmacy, Eftimie Murgu Sq. No. 2, 300041 Timișoara, Romania
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2020, 10(23), 8419; https://doi.org/10.3390/app10238419
Received: 16 October 2020 / Revised: 17 November 2020 / Accepted: 24 November 2020 / Published: 26 November 2020
(This article belongs to the Special Issue New Trends in Functional and Multifunctional Advanced Materials)
A novel electrochemical glucose sensor was developed, based on a multiwall carbon nanotubes (MWCNTs)-copper-1,3,5-benzenetricarboxylic acid (CuBTC)-epoxy composite electrode, named MWCNT-CuBTC. The electrode nanocomposite was prepared by a two-roll mill procedure and characterized morphostructurally by scanning electron microscopy (SEM). The CuBTC formed defined crystals with a wide size distribution, which were well dispersed and embedded in the MWCNTs. Its electrical conductivity was determined by four-point probe contact (DC) conductivity measurements. The electroactive surface area, determined using cyclic voltammetry (CV), was found to be 6.9 times higher than the geometrical one. The results of the electrochemical measurements using CV, linear sweep voltammetry (LSV), differential pulse voltammetry (DPV), chronoamperometry (CA) and multiple pulse amperometry (MPA) showed that the MWCNT-CuBTC composite electrode displayed high electrocatalytic activity toward the oxidation of glucose and, as a consequence, very high sensitivity. The best sensitivity of 14,949 µAmM−1cm−1 was reached using MPA at the potential value of 0.6 V/SCE, which was much higher in comparison with other copper-based electrodes reported in the literature. The good analytical performance, low cost and simple preparation method make this novel electrode material promising for the development of an effective glucose sensor. View Full-Text
Keywords: CuBTC-multiwall carbon nanotube-based electrochemical sensors; HKUST; glucose; electrochemical detection; differential pulse voltammetry; multiple pulse amperometry CuBTC-multiwall carbon nanotube-based electrochemical sensors; HKUST; glucose; electrochemical detection; differential pulse voltammetry; multiple pulse amperometry
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MDPI and ACS Style

Remes, A.; Manea, F.; Motoc, S.; Baciu, A.; Szerb, E.I.; Gascon, J.; Gug, G. Highly Sensitive Non-Enzymatic Detection of Glucose at MWCNT-CuBTC Composite Electrode. Appl. Sci. 2020, 10, 8419. https://doi.org/10.3390/app10238419

AMA Style

Remes A, Manea F, Motoc S, Baciu A, Szerb EI, Gascon J, Gug G. Highly Sensitive Non-Enzymatic Detection of Glucose at MWCNT-CuBTC Composite Electrode. Applied Sciences. 2020; 10(23):8419. https://doi.org/10.3390/app10238419

Chicago/Turabian Style

Remes, Adriana, Florica Manea, Sorina Motoc, Anamaria Baciu, Elisabeta I. Szerb, Jorge Gascon, and Georgiana Gug. 2020. "Highly Sensitive Non-Enzymatic Detection of Glucose at MWCNT-CuBTC Composite Electrode" Applied Sciences 10, no. 23: 8419. https://doi.org/10.3390/app10238419

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