Exploració per tema "Òxids"
Ara es mostren els items 1-16 de 16
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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 ... -
Estudi preliminar de l'obtenció de capes primes d'òxids simples Cu2O/ZnO a partir de tintes metal·lorgàniques per fabricar cel·les solars
(Universitat Politècnica de Catalunya, 2016-06-08)
Treball Final de Grau
Accés restringit per decisió de l'autor -
Methodology for EBSILON simulation studies of on-site generation CHP systems for data centre
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialThe use of information technology services is increasing and causes a rising energy demand of data centres. In order to cover the requirements linked to this effect and respond to the energetic and environmental goals, fossil ... -
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 ... -
New insights into the dynamics that control the activity of ceria-zirconia solid solutions in thermochemical water splitting cycles
(2017-08-24)
Article
Accés obertThe reactivity of a ceria-rich Ce0.85Zr0.15O2 solid solution toward the thermochemical water splitting process (TWS) was studied over repeated H2/H2O redox cycles. The structural and surface modifications after treatment ... -
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, ... -
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 ... -
Simultaneous nutrients (N,P) removal by using a hybrid inorganic sorbent impregnated with hydrated manganese oxide
(2017-04-01)
Article
Accés obertA natural clinoptilolite zeolite (Z-N) and its hybrid form (Z-Mn) prepared by impregnation with hydrated manganese oxide have been evaluated for the simultaneous removal of ammonium and phosphate. The ammonium sorption ... -
Structural and chemical state of doped and impregnated mesoporous Ni/CeO2 catalysts for the water-gas shift
(2018-10-25)
Article
Accés obertMesoporous Ni/CeO2 catalysts of variable loadings were prepared using in-situ doping and impregnation synthesis techniques. The catalysts were found to exhibit activity for the water-gas shift (WGS) reaction, particularly ... -
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 ... -
Water-gas-shift over metal-free nanocrystalline ceria: an experimental and theoretical study
(2017-04-21)
Article
Accés obertA tandem experimental and theoretical investigation of a mesoporous ceria catalyst reveals the properties of the metal oxide are conducive for activity typically ascribed to metals, suggesting reduced Ce3+ and oxygen ...