Publicación: Effect of nanocellulose polymorphism on electrochemical analytical performance in hybrid nanocomposites with non‑oxidized single‑walled carbon nanotubes
Fecha
2022-06-14
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info:eu-repo/semantics/openAccess
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Springer
Resumen
Two cellulose nanocrystals/single-walled carbon nanotube (CNC/SW) hybrids, using two cellulose polymorphs, were evaluated as electrochemical transducers: CNC type I (CNC-I/SW) and CNC type II (CNC-II/SW). They were synthesized and fully characterized, and their analytical performance as electrochemical sensors was carefully studied. In comparison with SWCNT-based and screen-printed carbon electrodes, CNC/SW sensors showed superior electroanalytical performance in terms of sensitivity and selectivity, not only in the detection of small metabolites (uric acid, dopamine, and tyrosine) but also in the detection of complex glycoproteins (alpha-1-acid glycoprotein (AGP)). More importantly, CNC-II/SW exhibited 20 times higher sensitivity than CNC-I/SW for AGP determination, yielding a LOD of 7 mg L −1 .These results demonstrate the critical role played by nanocellulose polymorphism in the electrochemical performance of CNC/SW hybrid materials, opening new directions in the electrochemical sensing of these complex molecules. In general, these high-active-surface hybrids smartly exploited the preserved non-oxidized SW conductivity with the high aqueous dispersibility of the CNC, avoiding the use of organic solvents or the incorporation of toxic surfactants during their processing, making the CNC/SW hybrids promising nanomaterials for electrochemical detection following greener approaches.
Descripción
Categorías UNESCO
Palabras clave
Single-walled carbon nanotube, Green chemistry, Cellulose nanocrystal, Sustainability, Electrochemical detection
Citación
Silvia Dortez-Herranz, Tania Sierra, M.A. Alvarez-Sanchez, J.M. Gonzalez-Dominguez, A.M. Benito, W.K. Maser, Agustín G. Crevillen*, Alberto Escarpa. TÍTULO: “Effect of nanocellulose polymorphism on electrochemical analytical performance in hybrid nanocomposites with non-oxidized single-walled carbon nanotubes” REF. REVISTA: Microchimica Acta, 2022, volumen 189, nº artículo 62. https://link.springer.com/article/10.1007%2Fs00604-021-05161-w
Centro
Facultades y escuelas::Facultad de Ciencias
Departamento
Ciencias Analíticas