Artículos de revista - Aldizkari artikuluak

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Browsing Artículos de revista - Aldizkari artikuluak by Author "Ababei, Gabriel"

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    Ferrihydrite surface functionalization of anatase TiO2 nanoparticles as flower-like core-shell heterostructure with enhanced visible-light-driven photocatalytic properties
    (Elsevier, 2025-07-15) Gherca, Daniel; Borhan, Adrian Iulian; Herea, Daniel-Dumitru; Minuti, Anca Emanuela; Stavila, Cristina; Danceanu, Camelia Mihaela; Popescu, Dana-Georgeta; Borca, Camelia Nicoleta; Huthwelker, Thomas; Stoian, George; Chiriac, Horia; Gómez Polo, Cristina; Ababei, Gabriel; Lupu, Nicoleta; Ciencias; Zientziak; Institute for Advanced Materials and Mathematics - INAMAT2
    The development of titania-based hybrid nanostructures with enhanced visible-light photocatalytic activity has been a key research area recently. The present study addresses current limitations of the TiO2 based composite photocatalyst by newly-experimental designing of flower-like multifunctional hybrid nanostructure with visible light capability through Ferrihydrite (Fh) surface TiO2 functionalization. Here, we present a versatile nanocompartimentalization process of which, core anatase TiO2 nanoparticles are emebeded into Fh lamellar shell. Physico-chemical properties related to the chemical structure and morphology of the prepared nanomaterials were comprehensively analysed using complementary analytical techniques, such as powder X-Ray Diffraction (XRD), Field-Emission Scanning Electron Microscopy (FE-SEM), Ultra-High Resolution Transmission Electron Microscopy (UHR-TEM), X-Ray Photoelectron Spectroscopy (XPS) and soft X-Ray Absorption Spectroscopy (XAS). The conducted visible-light-driven photocatalytic water splitting tests highlights significant enhancement in the Oxygen Evolution Reaction (OER) performance for TiO2-Fh core-shell nanoheterostructure of 25.6 μmol/L of molecular oxygen after 60 min of visible light irradiation (AM1.5G), and a photocatalytic water oxidation activity rate of 341.3 μmol l-1 g-1h-1. The biocompatibility assessment of the developed core-shell structures combined with their enhanced photocatalytic water oxidation activity under visible light illumination suits them as excellent candidates for the development of sustainable environmental remediation technologies.