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RESEARCH PRODUCT
Graphene and ionic liquids new gel paste electrodes for caffeic acid quantification
Federica ValentiniBarbara FlorisDavide RoscioliEugenio CaponettiNicoletta DitarantoDelia Chillura-martinoElvira Maria BauerValeria ConteMarilena CarboneLuigia Sabbatinisubject
Analytical chemistrySurfaces Coatings and FilmAnti-oxidant agentsCondensed Matter PhysicAnti-oxidant agentIonic liquidElectrochemistrylaw.inventionNanocompositeschemistry.chemical_compoundX-ray photoelectron spectroscopylawgraphene Ionic liquids; nanocomposites; electrochemistry; caffeic acid; anti-oxidant agentsMaterials ChemistryElectrochemistryMoleculeElectrical and Electronic EngineeringInstrumentationSettore CHIM/02 - Chimica FisicaMaterials Chemistry2506 Metals and AlloySettore CHIM/03 - Chimica Generale e InorganicaDetection limitCaffeic acidNanocompositeNanocompositeGrapheneElectronic Optical and Magnetic MaterialMetals and AlloysCondensed Matter Physicsgraphene Ionic liquidsSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIonic liquidschemistryChemical engineeringIonic liquidElectrode2506Graphenedescription
Abstract Graphene/ionic liquids nanocomposite gels were synthesized by an electrochemical etching approach and fully characterized under a morphological and structural point of view. For this purpose, several analytical techniques were applied, as HR-TEM/EDX (High Resolution-Transmission Electron Microscopy/Energy Dispersive X-Ray Analysis); FE-SEM/EDX (Field Emission-Scanning Electron Microscopy/Energy Dispersive X-Ray Analysis); XPS (X-Ray Photoelectron Spectroscopy); FT-IR (Fourier Transform-Infrared Spectroscopy) and electrochemical techniques. After the characterization study, nanocomposite-gel paste electrodes were assembled, exhibiting a selective and specific detection toward the caffeic acid oxidation. Better performances in terms of linear range of concentration (from 0.025 to 2.00 M), reproducibility (intra-; 1.40% and inter-electrode reproducibility-3.20%), sensitivity (3389/μA mM−1 cm−2), fast response time (2 s) and detection limit (0.005 mM) were obtained, in comparison with other chemically modified electrodes, described in literature for the caffeic acid detection. This nanocoposite-gel could represent a new prototype of miniaturized nanostructured sensors useful for the “in situ” quantification of an important molecule, having pharmacological properties, anti-inflammatory, antibacterial, antiviral, immunomodulatory and antioxidant effects.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-06-01 |