New carbon black-based conductive filaments for the additive manufacture of improved electrochemical sensors by fused deposition modeling.

Autor: Stefano JS; Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil., Silva LRGE; Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil.; Department of Physics, Chemistry, and Mathematics, Federal University of São Carlos, Sorocaba, São Paulo, 18052-780, Brazil., Janegitz BC; Department of Nature Sciences, Mathematics and Education, Federal University of São Carlos, Araras, São Paulo, 13600-970, Brazil. brunocj@ufscar.br.
Jazyk: angličtina
Zdroj: Mikrochimica acta [Mikrochim Acta] 2022 Oct 10; Vol. 189 (11), pp. 414. Date of Electronic Publication: 2022 Oct 10.
DOI: 10.1007/s00604-022-05511-2
Abstrakt: The development of a homemade carbon black composite filament with polylactic acid (CB-PLA) is reported. Optimized filaments containing 28.5% wt. of carbon black were obtained and employed in the 3D printing of improved electrochemical sensors by fused deposition modeling (FDM) technique. The fabricated filaments were used to construct a simple electrochemical system, which was explored for detecting catechol and hydroquinone in water samples and detecting hydrogen peroxide in milk. The determination of catechol and hydroquinone was successfully performed by differential pulse voltammetry, presenting LOD values of 0.02 and 0.22 µmol L -1 , respectively, and recovery values ranging from 91.1 to 112% in tap water. Furthermore, the modification of CB-PLA electrodes with Prussian blue allowed the non-enzymatic amperometric detection of hydrogen peroxide at 0.0 V (vs. carbon black reference electrode) in milk samples, with a linear range between 5.0 and 350.0 mol L -1  and low limit of detection (1.03 µmol L -1 ). Thus, CB-PLA can be successfully applied as additively manufactured electrochemical sensors, and the easy filament manufacturing process allows for its exploration in a diversity of applications.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Austria, part of Springer Nature.)
Databáze: MEDLINE
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