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Sökning: WFRF:(Chiesa Matteo)

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1.
  • Alfakes, Boulos, et al. (författare)
  • Enhanced photoelectrochemical performance of atomic layer deposited Hf-doped ZnO
  • 2020
  • Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 385
  • Tidskriftsartikel (refereegranskat)abstract
    • Generation of hydrogen using photoelectrochemical (PEC) water splitting has attracted researchers for the last two decades. Several materials have been utilized as a photoanode in a water splitting cell, including ZnO due to its abundance, low production cost and suitable electronic structure. Most research attempts focused on doping ZnO to tailor its properties for a specific application. In this work, atomic layer deposition (ALD) was used to precisely dope ZnO with hafnium (Hf) in order to enhance its PEC performance. The resultant doped materials showed a significant improvement in PEC efficiency compared to pristine ZnO, which is linked directly to Hf introduction revealed by detailed optical, structural and electrical analyses. The photocurrent obtained in the best performing Hf-doped sample (0.75 wt% Hf) was roughly threefold higher compared to the undoped ZnO. Electrochemical impedance spectroscopy (EIS) and open-circuit potential-decay (OCPD) measurements confirmed suppression in photocarriers' surface recombination in the doped films, which led to a more efficient PEC water oxidation. The enhanced PEC performance of Hf-doped ZnO and effectiveness of the used metal dopant are credited to the synergistic optimization of chemical composition, which enhanced the electrical, structural including morphological, and optical properties of the final material, making Hf-doping an attractive candidate for novel PEC electrodes.
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2.
  • Buarque Franzosi, Diogo, 1983, et al. (författare)
  • Vector boson scattering processes: Status and prospects
  • 2022
  • Ingår i: Reviews in Physics. - : Elsevier BV. - 2405-4283. ; 8
  • Forskningsöversikt (refereegranskat)abstract
    • Insight into the electroweak (EW) and Higgs sectors can be achieved through measurements of vector boson scattering (VBS) processes. The scattering of EW bosons are rare processes that are precisely predicted in the Standard Model (SM) and are closely related to the Higgs mechanism. Modifications to VBS processes are also predicted in models of physics beyond the SM (BSM), for example through changes to the Higgs boson couplings to gauge bosons and the resonant production of new particles. In this review, experimental results and theoretical developments of VBS at the Large Hadron Collider, its high luminosity upgrade, and future colliders are presented.
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3.
  • Ozer, Lütfiye Y., et al. (författare)
  • Long-Lasting Non-hydrogenated Dark Titanium Dioxide : Medium Vacuum Anneal for Enhanced Visible Activity of Modified Multiphase Photocatalysts
  • 2018
  • Ingår i: ChemCatChem. - : Wiley. - 1867-3880 .- 1867-3899. ; 10:14, s. 2949-2954
  • Tidskriftsartikel (refereegranskat)abstract
    • Multiphase TiO2 was stably modified by vacuum treatment for a dramatic improvement in visible-light absorption and photocatalytic reactivity. The samples were made of rutile-brookite, bare or N doped, and were grown on reduced graphene oxide. The stable introduction of Ti3+ species and oxygen vacancies resulting in mitigated electron?hole recombination was identified as the main responsible factor, along with a change in surface charges.
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  • Resultat 1-4 av 4
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