Exploració per tema "Oxides"
Ara es mostren els items 1-15 de 15
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Activation process of air stable nanoscale zero-valent iron particles
(2017-07-15)
Article
Accés obertNanoscale Zero Valent Iron (nZVI) represents a promising material for subsurface water remediation technology. However, dry, bare nZVI particles are highly reactive, being pyrophoric when they are in contact with air. The ... -
Application of nanoparticules of zero valent iron for nitrate removal from groundwater
(Universitat Politècnica de Catalunya, 2020-07-13)
Projecte Final de Màster Oficial
Accés obertThis study is a state-of-art of nitrate removal using nanoscale zero valent iron in groundwater. In this paper, the options to remediate groundwater contamination are reviewed : biological denitrification by heterotrophs ... -
Converting brownmillerite to alternate layers of Oxygen-deficient and conductive nano-sheets with enhanced thermoelectric properties
(John Wiley & sons, 2022-06-11)
Article
Accés obertIntroducing large oxygen deficiencies while retaining low resistivity is important for enhancing the overall thermoelectric properties in 3d transition-metal oxides. In this study, a new synthesis route to reconstruct the ... -
Cu supported on mesoporous ceria: water gas shift activity at low Cu loadings through metal-support interactions
(2017-06-20)
Article
Accés obertWe have synthesized and tested a highly active Cu doped mesoporous CeO2 catalyst system for the low temperature water-gas shift (WGS) reaction. While typical oxide-supported copper WGS catalysts are characterized by high ... -
Identification of highly selective surface pathways for methane dry reforming using mechanochemical synthesis of Pd-CeO2
(2022-10-07)
Article
Accés obertThe methane dry reforming (DRM) reaction mechanism was explored via mechanochemically prepared Pd/CeO2 catalysts (PdAcCeO2M), which yield unique Pd–Ce interfaces, where PdAcCeO2M has a distinct reaction mechanism and higher ... -
Influence of modifier oxides on spectroscopic features of Nd2O3 doped PbO-Ro2O3-WO3-B2O3 glasses (with Ro2O3 = Sb2O3, Al2O3, and Bi2O3)
(2020)
Article
Accés obertThe influence of modifier oxides (Ro2O3 = Sb2O3, Al2O3, and Bi2O3) on the spectral analysis of PbO-Ro2O3-WO3-B2O3 glasses doped with Nd3+ ions is investigated in this work. Samples were prepared by the melt quench method, ... -
Modelling and evaluating the consequences of the presence of O2− in NaF–ZrF4 molten fluoride salt
(Universitat Politècnica de Catalunya / Sorbonne univesités. Université Pierre et Marie Curie, 2011)
Projecte/Treball Final de Carrera
Accés obertThe framework of this study is the potential use of molten salts in the nuclear industry of the future. Those systems properties have been determined from finite temperature molecular dynamics simulations with a realistic ... -
Phosphate recovery from treated municipal wastewater using hybrid anion exchangers containing hydrated ferric oxide nanoparticles
(2017-08-07)
Article
Accés obertBACKDROUND This study presents the evaluation of two ion exchangers (granular and fibrous) impregnated with nanoparticles of hydrated ferric oxide (HFO) as selective sorbents for phosphate recovery from aqueous solutions. ... -
Polymorphic phase boundary in piezoelectric oxides
(American Institute of Physics (AIP), 2020-04-01)
Article
Accés obertThe design of phase boundaries has now become a consolidated strategy to improve the functional properties of piezoelectric oxides because of the unique properties that may be obtained in their vicinity. In particular, ... -
Quantification of plasma-produced hydroxyl radicals in solution and their dependence on the pH
(2021-03-02)
Article
Accés obertHO radicals are the most important reactive species generated during water treatment by non-thermal plasma devices. In this letter, we report the first quantification of the steady-state concentration and lifetime of ... -
Second harmonic generation from an ITO nanolayer: experiment versus theory
(International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
Text en actes de congrés
Accés obertWe report a comparative experimental and theoretical study of second harmonic generation from a 20nm-thick indium tin oxide nanolayer in the proximity of the epsilon-near-zero condition. We record the efficiency of the ... -
Shape-dependent CO2 hydrogenation to methanol over Cu2O nanocubes supported on ZnO
(2023-02-08)
Article
Accés obertThe hydrogenation of CO2 to methanol over Cu/ZnO-based catalysts is highly sensitive to the surface composition and catalyst structure. Thus, its optimization requires a deep understanding of the influence of the pre-catalyst ... -
Spectroscopy investigations reveal unprecedented details in the corrosion of AISI 1012 UPN profiles installed in a modernist building of beginning of 20th century
(2020-03-01)
Article
Accés obertn the present work, the corrosion affectation of an artistic and historical building, declared UNESCO World Heritage Site and constructed with AISI 1012 UPN profiles, was investigated. Micro-Raman and microscopy approaches ... -
Surface modification of a calcium fluoride filler and the effect on the nonisothermal crystallization behavior of poly(ethylene terephthalate)
(2014-12-01)
Article
Accés restringit per política de l'editorialTwo different types of calcium fluoride particles (approximate to 325 nm), one of them surface modified using a long-chain organophosphorous reagent, were incorporated into a poly(ethylene terephthalate) (PET) matrix. The ... -
Ultrathin wide-bandgap a-Si:H-based solar cells for transparent photovoltaic applications
(Wiley, 2022-01-01)
Article
Accés obertHerein, the fabrication of UV-blue selective transparent solar cells based on ultrathin (<30¿nm) intrinsic hydrogenated amorphous silicon films (a-Si:H) as absorber and using a fully inorganic architecture is reported, ...