Listar QICM - Artículos por título
Mostrando ítems 46-65 de 154
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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; Rodríguez-Castellón, 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; Pérez-Colodrero, Rosario Mercedes; Papadaki, M.; Garczarek, Piotr; Zon, Jerzy; Olivera-Pastor, Pascual; Losilla, Enrique R.; León-Reina, Laura; García-Aranda, Miguel Ángel; Choquesillo-Lazarte, Duane; Demadis, Konstantinos D.; Cabeza-Díaz, 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 ... -
High pressure and temperature spinning capillary cell for in-situ synchrotron X-ray powder diffraction
Fraga, Edmundo; Yáñez, Armando; Zea-Garcia, Jesus D.; Gómez-de-la-Torre, María de los Ángeles; Cuesta-García, Ana María; Valcárcel-Fernández, Ricardo; Farré-París, Francesc; Malfois, Marc; García-Aranda, Miguel Ángel[et al.] (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
Pérez-Colodrero, Rosario Mercedes; Olivera-Pastor, Pascual; Losilla, Enrique R.; Hernández Alonso, Daniel; García-Aranda, Miguel Ángel; León-Reina, Laura; Rius, Jordi; Demadis, Konstantinos D.; Moreau, Bernard; Villemin, Didier; Palomino, Miguel; Rey, Fernando; Cabeza-Díaz, Aurelio[et al.] (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
Pérez-Colodrero, Rosario Mercedes; Salcedo, Inés R.; Bazaga-García, Montse; Barouda, Eleni; Papadaki, Maria; Papathanasiou, Konstantinos E.; Hernández Alonso, Daniel; Rius, Jordi; García-Aranda, Miguel Ángel; Ramírez-Losilla, Enrique; Olivera-Pastor, Pascual; Demadis, Konstantinos D.; Cabeza-Díaz, Aurelio[et al.] (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
Dos-Santos-Gómez, Lucía; Zamudio-García, Javier; Porras-Vázquez, José Manuel; Losilla, Enrique R.; Marrero-López, David (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 ... -
Hydration and interactions between pure and doped C3S and C3A in the presence of different calcium sulfates
Neto, José da Silva Andrade; de Matos, Paulo R.; Gómez-de-la-Torre, María de los Ángeles; Campos, Carlos E. M.; Torres, Sandro M.; Monteiro, Paulo J. M.; Kirchheim, Ana Paula[et al.] (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
Sanfelix, Susana G.; Zea-Garcia, Jesus D.; Londono-Zuluaga, Diana; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles; Kjøniksen, Anna-Lena[et al.] (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
Zhao, Piqi; Bao, Xingyuan; Chen, Heng; Wang, Shoude; Lu, Lingchao; Gómez-de-la-Torre, María de los Ángeles; Cheng, Xin[et al.] (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
Cuesta-García, Ana María; Álvarez-Pinazo, Gema; Sanfeliz-Garcia, Susana; Peral, Inma; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles[et al.] (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
Álvarez-Pinazo, Gema; Santacruz-Cruz, María Isabel; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles (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
Neto, José da Silva Andrade; Rodríguez, Erick D.; Monteiro, Paulo J. M.; Gómez-de-la-Torre, María de los Ángeles; Kirchheim, Ana Paula (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
Cuesta-García, Ana María; Santacruz-Cruz, María Isabel; Sanfeliz-Garcia, Susana; Fauth, François; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles[et al.] (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
Álvarez-Pinazo, Gema; Santacruz-Cruz, María Isabel; León-Reina, Laura; García-Aranda, Miguel Ángel; Gómez-de-la-Torre, María de los Ángeles (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
García-Maté, Marta; Gómez-de-la-Torre, María de los Ángeles; León-Reina, Laura; García-Aranda, Miguel Ángel; Santacruz-Cruz, María Isabel (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 ... -
In situ hydration imaging study of a ye'elimite paste by ptychographic x-ray computed tomography
Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Trtik, Pavel; Da Silva, Julio C.; Cuesta-García, Ana María; Holler, Mirko; García-Aranda, Miguel Ángel[et al.] (2017)
Eco-cements are a desirable alternative to ordinary Portland cements because of their lower CO2 footprints. For instance, the manufacture of Calcium SulfoAluminate (CSA) cements is more environmentally friendly than that ... -
In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction
Álvarez-Pinazo, Gema; Cuesta-García, Ana María; García-Maté, Marta; Santacruz-Cruz, María Isabel; Ramírez-Losilla, Enrique; Sanfélix, Susana G; Fauth, François[et al.] (Karen Scrivener, 2014)
Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here,we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA ... -
In-situ laboratory X-ray diffraction applied to assess cement hydration
de Matos, Paulo R.; Neto, José da Silva Andrade; Jansen, Daniel; Gómez-de-la-Torre, María de los Ángeles; Kirchheim, Ana Paula; Campos, Carlos E. M.[et al.] (sciencedirect, 2022)
In-situ X-ray diffraction (XRD) is a powerful tool to assess the hydration of cementitious materials, providing time-resolved quantitative analysis with reasonable accuracy without disturbing sample. However, the lack ... -
Influence of curing temperature on belite cement hydration: a comparative study with Portland cement
Shirani, Shiva; Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Olbinado, Margie P.; García-Aranda, Miguel Ángel[et al.] (Elsevier, 2021-05-24)
Belite cements (BCs) could be a more sustainable binder than Portland cements (PCs) but adequate knowledge of the hydration features has still to be built. In particular, the mild curing hydration temperature effects have ...