Listar QICM - Artículos por título
Mostrando ítems 28-47 de 149
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Difracción de rayos-x (DRX) y cementos: desde la investigación hasta el control de calidad
García-Maté, Marta; Gomez-de-la-Torre, Maria de los Angeles
; García-Aranda, Miguel Ángel (2019-06-20)
Los materiales de construcción son componentes complejos de gran interés comercial. Por ello, el conocimiento cuantitativo de su mineralogía a través de la difracción de rayos X (DRX) es de crucial importancia para optimizar ... -
Divalent Metal Vinylphosphonate Layered Materials: Compositional Variability, Structural Peculiarities, Dehydration Behavior, and Photoluminescent Properties
Perez-Colodrero, Rosario Mercedes; Cabeza-Diaz, Aurelio; Olivera-Pastor, Pascual; Choquesillo-Lazarte, Duane; García-Ruíz, Juan M.; Turner, Adele; Ilia, Gheorghe; Maranescu, Bianca; Papathanasiou, Konstantinos E.; Hix, Gary B.; Demadis, Konstantinos D.; G. Aranda, Miguel Ángel[et al.] (American Chemical Society, 2011-09-27)
A family of M-VP (M = Ni, Co, Cd, Mn, Zn, Fe, Cu, Pb; VP = vinylphosphonate) and M-PVP (M = Co, Cd; PVP = phenylvinylphosphonate) materials have been synthesized by hydrothermal methods and characterized by FTIR, elemental ... -
Durability and performance of CGO barriers and LSCF cathode deposited by spray-pyrolysis
Dos Santos-Gómez, Lucía; Hurtado, Javier; Porras-Vazquez, Jose Manuel; Losilla, Enrique R.; Marrero-López, David (Elsevier, 2018-03-19)
Ce0.9Gd0.1O1.95 (CGO) protective layers are prepared by two different methods to prevent the reaction between the Zr0.84Y0.16O1.92 (YSZ) electrolyte and the La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode. In the first method, ... -
Early hydration of belite-ye’elimite-ferrite cements: Role of admixtures
Pérez-Bravo, Raquel; Morales-Cantero, Alejandro; Cuesta-Garcia, Ana Maria; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles[et al.] (sciencedirect, 2023)
The effect of TIPA and CaCl2 on early hydration, i.e. 24 h, of a B-BYF cement has been studied by in situ synchrotron X-ray powder diffraction, calorimetry, thermal analysis, NMR, and rheological measurements of the pastes ... -
Early-age reactivity of calcined kaolinitic clays in LC3 cements: a multitechnique investigation including pair distribution function analysis
Bernal, Isabel M.R.; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles; Cuesta-Garcia, Ana Maria (Taylor & Francis, 2022-09)
Limestone Calcined Clay Cements, LC3, allows CO2 emissions savings up to 40%. The resulting binders have competitive mechanical performances after a week. However, the reactivity of LC3 at early ages is slow and should be ... -
Effect of Basic Promoters on Porous Supported Alumina Catalysts for Acetins Production
Bezerra, Rita de Cássia F.; Mota, Gabriela; Vidal, Ruth Maria B.; Vitor do Carmo, Jose; Saraiva, Gilberto D.; Campos, Adriana; Oliveira, Alcineia C.; Lang, Rossano; Otubo, Larissa; Jiménez-Jiménez, José; Rodriguez-Castellon, Enrique[et al.] (IOAP-MDPI, 2022-12-09)
A facile strategy for the design of porous supports was obtained by modifying the sol-gel method followed by the wet impregnation technique. In this respect, herein, the acidity of the γ-Al2O3 phase was modulated by adding ... -
Effect of boron and water-to-cement ratio on the performances of laboratory prepared Belite-Ye'elimite-Ferrite (BYF) cements
Pérez-Bravo, Raquel; Morales-Cantero, Alejandro; Bruscolini, Marguerita; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel; Gomez-de-la-Torre, Maria de los Angeles[et al.] (2021)
The effect of superplasticiser, borax and the water-to-cement ratio on BYF hydration and mechanical strengths has been studied. Two laboratory-scale BYF cements—st-BYF (with -C2S and orthorhombic C4A3 S) and borax-activated ... -
Effect of calcium sulfate source on the hydration of calcium sulfoaluminate eco-cement
García-Maté, Marta; Gomez-de-la-Torre, Maria de los Angeles; León-Reina, Laura; Ramirez-Losilla, Enrique; García-Aranda, Miguel Ángel; Santacruz-Cruz, Maria Isabel[et al.] (2014)
The availability of cements, including eco-cements, with tailored mechanical properties is very important for special applications in the building industry. Here we report a full study of the hydration of calcium sulfoaluminate ... -
Effect of Microencapsulated Phase Change Materials on the Flow Behavior of Cement Composites
Garcia Sanfelix, Susana; Santacruz-Cruz, Maria Isabel; Szczotok, Anna M.; Belloc, Luis Miguel O.; Gomez-de-la-Torre, Maria de los Angeles; Kjøniksen, Anna-Lena[et al.] (2019)
Microencapsulated phase change materials (MPCMs) were incorporated into cement pastes of Portland cement (PC). Minislump tests and rheological properties of cement pastes containing three MPCMs with different surfaces ... -
Effect of Zn addition on the structure and electrochemical properties of codoped BaCe0.6Zr0.2Ln0.2O3-δ (Ln=Y, Gd, Yb) proton conductors
Zamudio-García, Javier; Porras-Vazquez, Jose Manuel; Dos Santos-Gómez, Lucía; Losilla, Enrique R.; Marrero-López, David (Elsevier, 2018-05-02)
In this work, BaCe0.6Zr0.2Y0.2-xYbxO3-δ and BaCe0.6Zr0.2Gd0.2-xYbxO3-δ (x=0–0.20), proton conducting materials are prepared by the freeze-drying precursor method. The sintering conditions were optimized by adding ... -
The effects of MgO, Na2O and SO3 on industrial clinkering process: phase composition, polymorphism, microstructure and hydration, using a multidisciplinary approach
Segata, Monica; Nicoletta, Marinoni; Matteo, Galimberti; Maurizio, Marchi; Marco, Cantaluppi; Alessandro, Pavese; Gomez-de-la-Torre, Maria de los Angeles[et al.] (2019-07-02)
The present investigation deals with how minor elements (their oxides: MgO, Na2O and SO3) in industrial kiln feeds affect (i) chemical reactions upon clinkering, (ii) resulting phase composition and microstructure ... -
Effects of sulfates on the hydration of Portland cement – A review
Presented within is a critical overview of the effect of sulfates on cement hydration, properties, and optimum sulfate content in Portland cement. Calcium sulfate is used in Portland cement to control the C3A reaction ... -
Enhancement of the catalytic activity of Mg/Al layered double hydroxide for glycerol oligomers production
Soares Barros, Fernando José; Liu, Yue; Dantas Paula, Clarissa; Murilo Tavares de Luna, Francisco; Silveira Vieira, Rodrigo; Rodriguez-Castellon, Enrique; Silveira Vieira, Rodrigo[et al.] (RSC, 2022-01-27)
In this study, the impact of rehydration on the catalytic properties of Mg/Al layered double hydroxides (LDH) for glycerol ligomerization was assesed. Although previous works have employed other LDH derived materials in ... -
Error analysis and correction for quantitative phase analysis based on Rietveld-internal method: Whether the minor phases can be ignored?
Zhao, Piqi; Lu, Lingchao; Liu, Xianping; Gomez-de-la-Torre, Maria de los Angeles; Xin, Cheng (MDPI, 2018-02)
The Rietveld-internal standard method for Bragg-Brentano reflection geometry (q/2q) X-ray diffraction (XRD) patterns is implemented to determine the amorphous phase content. The effect of some minor phases on quantitative ... -
Experimental and theoretical high pressure study of calcium hydroxyaluminate phases
Cuesta-Garcia, Ana Maria; Pawel, Rejmak; Ayuela, Andres; Gomez-de-la-Torre, Maria de los Angeles; Santacruz-Cruz, Maria Isabel; Carrasco, Lucia F.; Popescu, Catalin; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2017)
Five calcium hydroxyaluminate phases have been investigated by synchrotron powder diffraction at high-pressure: two hydrogarnets, kuzelite, stratlingite and ettringite. The obtained bulk modulus, K0, for kuzelite, stratlingite ... -
Exploiting the Multifunctionality of M2+/Imidazole−Etidronates for Proton Conductivity (Zn2+) and Electrocatalysis (Co2+, Ni2+) toward the HER, OER, and ORR
Vílchez-Cózar, Álvaro; Armakola, Eirini; Gjika, Maria; Visa, Aurelia; Bazaga-García, Montse; Olivera-Pastor, Pascual; Choquesillo-Lazarte, Duane; Marrero-López, David; Cabeza-Diaz, Aurelio; P. Colodrero, Rosario M.; Demadis, Konstantinos D.[et al.] (American Chemical Society, 2022-02-22)
This work deals with the synthesis and characterization of one-dimensional (1D) imidazole-containing etidronates, [M2(ETID)(Im)3]·nH2O (M = Co2+ and Ni2+; n = 0, 1, 3) and Zn2(ETID)2(H2O)2](Im)2, as well as the corresponding ... -
From light to heavy alkali metal tetraphosphonates (M = Li, Na, K, Rb, Cs): cation size-induced structural diversity and waterfacilitated proton conductivity
Salcedo, Inés R.; Perez-Colodrero, Rosario Mercedes; Bazaga-García, Montse; Vasileiou, Antonia; Papadaki, Maria; Olivera-Pastor, Pascual; Infantes-Molina, Antonia; Ramirez-Losilla, Enrique; Mezei, Gellert; Cabeza-Diaz, Aurelio; Demadis, Konstantinos D.[et al.] (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
Bertolini, Guillermo R.; Jiménez-Gómez, Carmen Pilar; Cecilia-Buenestado, Juan Antonio; Maireles-Torres, Pedro Jesús (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
Besghaier, Sabrine; Cecilia-Buenestado, Juan Antonio; Chouikhi, Nesrine; Vilarrasa García, Enrique; Rodriguez-Castellon, Enrique; Chlendi, Mohamed; Bagane, Mohamed[et al.] (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
Bazaga-García, Montse; Perez-Colodrero, Rosario Mercedes; Papadaki, M.; Garczarek, Piotr; Zon, Jerzy; Olivera-Pastor, Pascual; Losilla, Enrique R.; León-Reina, Laura; G. Aranda, Miguel Ángel; Choquesillo-Lazarte, Duane; Demadis, Konstantinos D.; Cabeza-Diaz, Aurelio[et al.] (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 ...