Electrocatalytic Nanostructured Ferric Tannates: Characterization and Application of a Polyphenol Nanosensor
| Autor: | Vittorino Corraducci, Radek Zbořil, Davide Baratella, Jessica de Almeida Roger, Emanuela Bonaiuto, Fabio Vianello, Ondrej Malina, Jiri Tucek, Massimiliano Magro, Petr Jakubec |
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| Rok vydání: | 2016 |
| Předmět: |
iron oxide
Materials science organic–inorganic hybrid composites Inorganic chemistry Iron oxide Maghemite Nanoparticle 02 engineering and technology engineering.material 010402 general chemistry Electrochemistry Ferric Compounds 01 natural sciences Catalysis Nanomaterials chemistry.chemical_compound Atomic and Molecular Physics medicine Physical and Theoretical Chemistry Voltammetry Polyphenols Electrochemical Techniques Chronoamperometry 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics tannic acid Nanostructures 0104 chemical sciences electrochemistry chemistry nanoparticles engineering Ferric and Optics 0210 nano-technology Tannins medicine.drug Nuclear chemistry |
| Zdroj: | ChemPhysChem. 17:3196-3203 |
| ISSN: | 1439-4235 |
| Popis: | A novel core-shell hybrid nanomaterial composed of peculiar maghemite nanoparticles (surface-active maghemite nanoparticles (SAMNs)) as the core and tannic acid (TA) as the shell was developed by self-assembly of ferric tannates onto the surface of SAMNs by simple incubation in water. The hybrid nanomaterial (SAMN@TA) was characterized by using UV/Vis, FTIR, and Mössbauer spectroscopies, magnetization measurements, and X-ray powder diffraction, which provide evidence of a drastic reorganization of the iron oxide surface upon reaction with TA and the formation of an outer shell that consists of a cross-linked network of ferric tannates. According to a Langmuir isotherm analysis, SAMN@TA offers one of most stable iron complexes of TA reported in the literature to date. Moreover, SAMN@TA was characterized by using electrical impedance spectroscopy, voltammetry, and chronoamperometry. The nanostructured ferric tannate interface showed improved conductivity and selective electrocatalytic activity toward the oxidation of polyphenols. Finally, a carbon-paste electrode modified with SAMN@TA was used for the determination of polyphenols in blueberry extracts by square-wave voltammetry. |
| Databáze: | OpenAIRE |
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