Multi-wall carbon nanotubes electrochemically modified with phosphorus and nitrogen functionalities as a basis for bioelectrodes with improved performance
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Título: | Multi-wall carbon nanotubes electrochemically modified with phosphorus and nitrogen functionalities as a basis for bioelectrodes with improved performance |
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Autor/es: | Quintero-Jaime, Andrés Felipe | Conzuelo, Felipe | Schuhmann, Wolfgang | Cazorla-Amorós, Diego | Morallon, Emilia |
Grupo/s de investigación o GITE: | Electrocatálisis y Electroquímica de Polímeros | Materiales Carbonosos y Medio Ambiente |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Electrochemical modification | PQQ-GDH | Electron-transfer | Biocatalyst | Sensing |
Área/s de conocimiento: | Química Física | Química Inorgánica |
Fecha de publicación: | 6-may-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Electrochimica Acta. 2021, 387: 138530. https://doi.org/10.1016/j.electacta.2021.138530 |
Resumen: | In this study, multi-wall carbon nanotubes (MWCNTs) were electrochemically modified with nitrogen and phosphorus species and employed as platform to immobilize pyrroloquinoline quinone-dependent glucose dehydrogenase (PQQ-GDH) for the fabrication of bioelectrodes for glucose detection. Depending on the upper potential limit used during the electrochemical modification of MWCNTs, the nature and amount of the nitrogen and phosphorus species incorporated in the carbon material surface can be selectively controlled. These species act as anchoring groups for the immobilization of the PQQ-GDH. The value of the upper potential limit used in the electrochemical modification influences the electron-transfer rate between the electrode and the enzyme. The performance of the bioelectrodes for glucose oxidation and detection is improved by the electrochemical modification conditions, leading to an increased sensitivity towards glucose oxidation from 39.2 to 53.6 mA gMWCNT−1 mM−1 in a linear range between 0.1 to 1.2 mM. This electrochemical modification is considered as an alternative for the preparation of highly sensitive glucose bioelectrodes. |
Patrocinador/es: | The authors would like to thank Ministerio de Ciencia e Innovación (PID2019-105923RB-I00) for the financial support. A.F.Q.J. gratefully acknowledges Generalitat Valenciana for the financial support through Santiago Grisolia grant (GRISOLIA/2016/084), to the University of Alicante for the support in the mobility program through the Escuela de Doctorado (EDUA). |
URI: | http://hdl.handle.net/10045/114911 |
ISSN: | 0013-4686 (Print) | 1873-3859 (Online) |
DOI: | 10.1016/j.electacta.2021.138530 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.electacta.2021.138530 |
Aparece en las colecciones: | INV - MCMA - Artículos de Revistas INV - GEPE - Artículos de Revistas |
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