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Dual-mode electrochemical and SERS detection of PFAS using functional porous substrate.
Kukralova, Karolina; Miliutina, Elena; Guselnikova, Olga; Burtsev, Vasilii; Hrbek, Tomas; Svorcik, Vaclav; Lyutakov, Oleksiy.
Afiliación
  • Kukralova K; Department of Solid State Engineering, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic. Electronic address: kukraloa@vscht.cz.
  • Miliutina E; Department of Solid State Engineering, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic; Materials Centre, Faculty of Science, J. E. Purkyne University, Pasteurova 3544/1, 400 96, Ústí nad Labem, Czech Republic. Electronic address: elena.miliutina@vscht.cz.
  • Guselnikova O; Centre of Electrochemical and surface technology, Viktor Kaplan Straße 2, Wiener Neustadt, 2700, Austria. Electronic address: olga.guselnikova@cest.at.
  • Burtsev V; Department of Solid State Engineering, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic. Electronic address: burtsevv@vscht.cz.
  • Hrbek T; Department of Surface and Plasma Science, Faculty of Mathematics and Physics, Charles University, V Holesovickách 2, 180 00, Prague 8, Czech Republic. Electronic address: tomas.hrbek@matfyz.cuni.cz.
  • Svorcik V; Department of Solid State Engineering, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic. Electronic address: svorcikv@vscht.cz.
  • Lyutakov O; Department of Solid State Engineering, University of Chemistry and Technology, Technická 5, 16628, Prague, Czech Republic. Electronic address: lyutakoo@vscht.cz.
Chemosphere ; 364: 143149, 2024 Sep.
Article en En | MEDLINE | ID: mdl-39182732
ABSTRACT
Human activity is the cause of the continuous and gradual grooving of environmental contaminants, where some released toxic and dangerous compounds cannot be degraded under natural conditions, resulting in a serious safety issue. Among them are the widely occurring water-soluble perfluoroalkyl and polyfluoroalkyl substances (PFAS), sometimes called "forever chemicals" because of the impossibility of their natural degradation. Hence, a reliable, expressive, and simple method should be developed to monitor and eliminate the risks associated with these compounds. In this study, we propose a simple, express, and portable detection method for water-soluble fluoro-alkyl compounds (PFOA and GenX) using mutually complementary

methods:

electrochemical impedance spectroscopy (EIS) and surface-enhanced Raman spectroscopy (SERS). To implement our method, we developed special substrates based on porous silicon with a top-deposited plasmon-active Au layer by subsequently grafting -C6H4-NH2 chemical moieties to provide surface affinity toward negatively charged water-soluble PFAS. Subsequent EIS utilization allows us to perform semiquantitative detection of PFOA and GenX up to 10-10 M concentration because surface entrapping of PFAS leads to a significant increase in the electrode-electrolyte charge-transfer resistance. However, distinguishing by EIS whether even PFAS were entrapped was impossible, and thus the substrates were subsequently subjected to SERS measurements (allowed by surface plasmon activity due to the presence of a porous Au layer), clearly indicating the appearance of characteristic C-F vibration bands.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Espectrometría Raman / Fluorocarburos Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Espectrometría Raman / Fluorocarburos Idioma: En Revista: Chemosphere Año: 2024 Tipo del documento: Article Pais de publicación: Reino Unido