A5084011270- Advanced Photocatalysis Techniques
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Gas Sensing Nanomaterials and Sensors
- Ga2O3 and related materials
- Catalytic Processes in Materials Science
- TiO2 Photocatalysis and Solar Cells
- Perovskite Materials and Applications
- Luminescence Properties of Advanced Materials
- Molecular Communication and Nanonetworks
- Nanoplatforms for cancer theranostics
- Covalent Organic Framework Applications
- Radioactive element chemistry and processing
- Quantum-Dot Cellular Automata
- Quantum optics and atomic interactions
- Calcium signaling and nucleotide metabolism
- Advanced Frequency and Time Standards
- Atomic and Subatomic Physics Research
- Chalcogenide Semiconductor Thin Films
Istituto Nazionale di Ricerca Metrologica
2022-2023
University of Turin
2017-2022
Torino e-district
2020
Heterogeneous photocatalysis is a promising environmentally friendly strategy for removing contaminants of emerging concern from water, with titanium dioxide being the most studied and exploited photocatalyst, thanks to its good optical electrical properties. However, one main drawbacks linked use limited absorption sunlight; several strategies have been explored enhance in visible light region and, among them, doping elements belonging lanthanoid series particularly attractive. This review...
The synthesis of a mixed CeO2–ZnO oxide results in photocatalyst active under visible light. characterization the new material shows that Ce does not enter as dopant ZnO but rather forms isolated CeO2 nanoparticles supported on surface larger particles more abundant zinc phase. obtained exhibits band gap corresponding to UV light (∼3.3 eV), nevertheless. it relevant photoactivity irradiation with photons λ > 420 nm (visible light). working hypothesis is leads charge separation and...
The effect of cobalt doping on semiconductors materials synthesized via solution and hydrothermal methods was investigated by testing its photocatalytic efficiency pollutants abatement. X Ray Diffraction technique used to evaluate samples crystallographic phases allowing identify different species due the introduction dopants. Diffuse Reflectance UV–vis Spectroscopy employed determine bandgap as well absorption corresponding d-d transitions for doped systems. Finally, Electron Paramagnetic...
In this paper we compare the photocatalytic activity of two semiconductors based on ZnO: ZnO/CeO2 and ZnO/Yb2O3. The samples were prepared via hydrothermal synthesis fully characterized by X-ray diffraction technique, diffuse reflectance Ultra Violet- Visible spectroscopy (UV-Vis), high resolution transmission electron microscopy finally with paramagnetic resonance spectroscopy. materials also tested in their performances both through Electron Paramagnetic Resonance (EPR) analyzing formation...
Due to its thermal stability, conductivity, high exciton binding energy and electron mobility, zinc oxide is one of the most studied semiconductors in field photocatalysis. However, wide bandgap requires use UV photons harness potential. A convenient way appease such a limitation doping lattice with foreign atoms which, turn, introduce localized states (defects) within bandgap. Such make material optically active visible range reduce required initiate photo-driven charge separation events....
In the present study, we investigated effect of cerium doping in zinc oxide matrix, used as photoactive material. Cerium ions into matrix ZnO can act like a 'trap' for electrons, lowering e -/h + recombination rate and so increasing photocatalytic efficiency ZnO. We synthesised doped samples using simple precipitation route. The amount dopant was, 1 10% molar. have been studied via x-ray diffraction measurements structural characterisation; UV-visible diffuse reflectance was optical...
This work unambiguously describes the direct-<italic>Z</italic>scheme governing charge carrier separation induced by visible light of C<sub>3</sub>N<sub>4</sub>–ZnO heterojunction.
C3N4 is an innovative material that has had huge success as a photocatalyst in recent years. More recently, it been coupled to robust metal oxides obtain more stable materials. This work focused on the different synthesis techniques used prepare bare and combined C3N4/ZnO mixed systems. Different precursors, such pure melamine cyanuric acid-based supramolecular complexes, were employed for preparation of material. Moreover, solvents also used, demonstrating use water leads formation...
Upconversion (UC) nanoparticles characterized by red upconversion emission, particularly interesting for biological applications, have been prepared and subsequently modified the covalent anchoring of Verteporfin (Ver), an FDA approved photosensitizer (PS) which usually exerts its photodynamic activity upon excitation with light. ZrO2 was chosen as platform where Yb3+ Er3+ were inserted sensitizer activator ions, respectively. Careful control doping ratio, along a detailed physico-chemical...
The photochemical activity of the recently proposed CeO2-ZnO photocatalytic material active under visible light has been improved by means significant modifications its morphology. A polymeric templating agent (Pluronic) used in synthesis obtaining a particle morphology based on hollow spheres that is better defined case high template concentration. charge separation ability and light-induced surface electron transfer irradiation with polychromatic various ranges wavelengths investigated...
Time and frequency metrology is a key enabler for both forefront science innovation. At the moment, atomic standards (AFSs) are based on atoms either in vapor phase or trapped magneto-optical lattices vacuum. Finding solid-state material that contains suitable to be used as reference would an important step forward simplification of setup AFSs. Lanthanide-doped inorganic crystals, such Er-doped LiYF4, have been studied several decades, their intrashell 4f transitions usually identified...