Listar QICM - Artículos por título
Mostrando ítems 57-76 de 184
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From light to heavy alkali metal tetraphosphonates (M = Li, Na, K, Rb, Cs): cation size-induced structural diversity and waterfacilitated proton conductivity
(The Royal Society of Chemistry, 2018-09)A family of alkali metal-based frameworks containing the tetraphosphonate ligand hexamethylenediamine- N,N,N′,N′-tetrakisIJmethylenephosphonic acid), HDTMP, is reported. A cation size-induced structural diversity, from ... -
Gas-Phase Hydrogenation of Furfural to Furfuryl Alcohol over Cu-ZnO-Al2O3 Catalysts Prepared from Layered Double Hydroxides
(MDPI, 2020-04-29)Several layered double hydroxides (LDHs) with general chemical composition (Cu,Zn)1-xAlx(OH)2(CO3)x/2 .. mH2O have been synthesized by the co-precipitation method, maintaining a (M2+/M3+) molar ratio of 3, and varying the ... -
Glyphosate adsorption onto porous clay heterostructure (PCH): kinetic and thermodynamic studies
(Springer, 2021-10-07)The synthesis of PCH from natural bentonite produces a porous heterostructure material effective for the adsorption of glyphosate from water. The adsorption process takes place through an interaction between the silanol ... -
Guest Molecule-Responsive Functional Calcium Phosphonate Frameworks for Tuned Proton Conductivity
(American Chemical Society, 2014-03-18)We report the synthesis, structural characterization, and functionality of an open-framework hybrid that combines Ca2+ ions and the rigid polyfunctional ligand 5-(dihydroxyphosphoryl) isophthalic acid (PiPhtA). Ca-PiPhtA-I ... -
High pressure and temperature spinning capillary cell for in-situ synchrotron X-ray powder diffraction
(2019)In situ research of materials under moderate pressures (hundreds of bar) is essential in many scientific fields. These range from gas sorption to chemical and biological processes. One industrially important discipline is ... -
High Proton Conductivity in a Flexible, Cross-Linked, Ultramicroporous Magnesium Tetraphosphonate Hybrid Framework
(American Chemical Society, 2012-07-03)Multifunctional materials, especially those combining two or more properties of interest, are attracting immense attention due to their potential applications. MOFs, metal organic frameworks, can be regarded as multifunctional ... -
High-Throughput Synthesis of Pillared-Layered Magnesium Tetraphosphonate Coordination Polymers: Framework Interconversions and Proton Conductivity Studies
(MDPI, www.mdpi.com/journal/inorganics, 2018-09-11)Novel pillared-layered framework materials were synthesized by high-throughput or microwave-assisted methodology that contain Mg2+ and the zwitterionic linker HDTMP (hexamethylenediamine-N,N,N0,N0-tetrakis(methylenephosphonic ... -
Highly efficient La0.8Sr0.2MnO3-δ - Ce0.9Gd0.1O1.95 nanocomposite cathodes for solid oxide fuel cells
(Elsevier, 2017-12-15)La0.8Sr0.2MnO3-δ-Ce0.9Gd0.1O1.95 (LSM-CGO) nanostructured cathodes are successfully prepared in a single process by a chemical spray-pyrolysis deposition method. The cathode is composed of nanometric particles of approximately ... -
Highly oriented and fully dense CGO films prepared by spray-pyrolysis and different precursor salts.
(Elsevier, 2020-03-19)CeO2–based thin films are prepared by spray-pyrolysis deposition from different aqueous precursor solutions containing nitrate, chloride or acetate salts. The morphology and orientation growth strongly depends on the precursor ... -
Hydration Activation of Alite-Belite-Ye’elimite Cements by Doping with Boron
(2020)The hydration behavior of two alite-belite-ye’elimite (ABY) cements has been studied. The production of these materials releases into atmosphere ∼17% less CO2 compared to Portland cement. The ABY cement contains alite, ... -
Hydration and interactions between pure and doped C3S and C3A in the presence of different calcium sulfates
(2022)This research studied the hydration of C3S-C3A-calcium sulfate systems made of combinations of two C3S (pure triclinic and Al-doped monoclinic), two C3A (pure cubic C3A and Na-doped orthorhombic), and two calcium sulfates ... -
Hydration development and thermal performance of calcium sulphoaluminate cements containing microencapsulated phase change materials
(2020-03-24)Microencapsulated phase change materials (MPCM) incorporated in buildings walls can reduce indoor temperature fluctuations, conserving energy and enhancing thermal comfort. MPCM were incorporated in calcium sulphoaluminate ... -
Hydration mechanisms of Ba-doped ye’elimite: effect of Ba/Ca ratio on hydration behavior
(2020-09-28)Than stoichiometric one. However, the hydration mechanism is not well understood, in particular for the effect of Ba/Ca ratio on hydration behavior. To shed light on this issue, high purity C4-xBxA3$ samples with designed ... -
Hydration mechanisms of two polymorphs of synthetic ye'elimite
(Elsevier, 2014-05-26)Ye'elimite is the main phase in calcium sulfoaluminate cements and also a key phase in sulfobelite cements. However, its hydrationmechanismis not well understood. Here we reported newdata on the hydration behavior of ... -
Hydration of Belite-Ye’elimite-Ferrite(BYF) cements with different calcium sulfate sources
(ICE publishing, 2016-07)Belite-Ye’elimite-Ferrite cements, BYF, are a sustainable alternative to OPC to reduce CO2 emissions. The aim of this research is to understand the influence of the sulfate source on the hydration of two laboratory-prepared ... -
Hydration of C3S and Al-doped C3S in the presence of gypsum
(sciencedirect, 2022)A complete understanding of the effect of gypsum on the C3S hydration and the role of aluminum has not been achieved. The effects of gypsum (at 2.5 wt% and 5.0 wt%) on the hydration of tricalcium silicate (C3S) and aluminum-doped ... -
Hydration of C4AF in the presence of other phases: A synchrotron X-ray powder diffraction study
(Elsevier, 2015)Hydration behaviour of C4AF in selected experimental conditions has been determined. C4AF has been hydrated in the absence and presence of gypsum, two polymorphs of ye’elimite and different water/solid ratios. C4AF in ... -
Hydration Reactions and Mechanical Strength Developments of Iron- Rich Sulfobelite Eco-cements
(2013)Belite calcium sulfoaluminate (BCSA) cements are low-CO2 building materials. However, their hydration behavior and its effect on mechanical properties have still to be clarified. Here, we report a full multitechnique study ... -
Hydration studies of calcium sulfoaluminate cements blended with fly ash
(Elsevier, 2013)The main objective of this work is to study the hydration and properties of calciumsulfoaluminate cement pastes blended with fly ash (FA) and the corresponding mortars at different hydration ages. Laboratory X-ray ... -
Impact of the lanthanide size on the polymorphism and electrical properties of Ln5.4MoO11.1 (Ln = Nd, Sm and Gd)
(Elsevier, 2023)Mixed proton-electronic conductors are of great interest for high temperature electrochemical devices, such as hydrogen separation membranes. In this contribution, ceramics with composition Ln5.4MoO11.1 (Ln = Nd, Sm and ...