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Open AccessArticle

Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode

1
Escuela de Ciencias Químicas, Pontificia Universidad Católica del Ecuador, Quito 17 01 21-84, Ecuador
2
School of Physical Sciences and Nanotechnology, Yachay Tech University, Urcuqui 100650, Ecuador
3
Departamento de Química, Universidad Simón Bolívar, Caracas 89000, Venezuela
4
Instituto Venezolano de Investigaciones Científicas, Centro de Ingeniería Materiales y Nanotecnología, Caracas 89000, Venezuela
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(7), 1328; https://doi.org/10.3390/nano10071328
Received: 8 June 2020 / Revised: 30 June 2020 / Accepted: 1 July 2020 / Published: 7 July 2020
(This article belongs to the Special Issue Carbon-Based Nanomaterials for (Bio)Sensors Development)
In this work, a new hydrogen peroxide (H2O2) electrochemical sensor was fabricated. Prussian blue (PB) was electrodeposited on a glassy carbon (GC) electrode modified with zirconia doped functionalized carbon nanotubes (ZrO2-fCNTs), (PB/ZrO2-fCNTs/GC). The morphology and structure of the nanostructured system were characterized by scanning and transmission electron microscopy (TEM), atomic force microscopy (AFM), specific surface area, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman and Fourier transform infrared (FTIR) spectroscopy. The electrochemical properties were studied by cyclic voltammetry (CV) and chronoamperometry (CA). Zirconia nanocrystallites (6.6 ± 1.8 nm) with cubic crystal structure were directly synthesized on the fCNTs walls, obtaining a well dispersed distribution with a high surface area. The experimental results indicate that the ZrO2-fCNTs nanostructured system exhibits good electrochemical properties and could be tunable by enhancing the modification conditions and method of synthesis. The fabricated sensor could be used to efficiently detect H2O2, presenting a good linear relationship between the H2O2 concentration and the peak current, with quantification limit (LQ) of the 10.91 μmol·L−1 and detection limit (LD) of 3.5913 μmol·L−1. View Full-Text
Keywords: carbon nanotubes; zirconia nanoparticles; Prussian blue; electrochemical sensors carbon nanotubes; zirconia nanoparticles; Prussian blue; electrochemical sensors
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MDPI and ACS Style

Jerez-Masaquiza, M.D.; Fernández, L.; González, G.; Montero-Jiménez, M.; Espinoza-Montero, P.J. Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode. Nanomaterials 2020, 10, 1328. https://doi.org/10.3390/nano10071328

AMA Style

Jerez-Masaquiza MD, Fernández L, González G, Montero-Jiménez M, Espinoza-Montero PJ. Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode. Nanomaterials. 2020; 10(7):1328. https://doi.org/10.3390/nano10071328

Chicago/Turabian Style

Jerez-Masaquiza, Marlon D.; Fernández, Lenys; González, Gema; Montero-Jiménez, Marjorie; Espinoza-Montero, Patricio J. 2020. "Electrochemical Sensor Based on Prussian Blue Electrochemically Deposited at ZrO2 Doped Carbon Nanotubes Glassy Carbon Modified Electrode" Nanomaterials 10, no. 7: 1328. https://doi.org/10.3390/nano10071328

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