Listar por departamento/instituto "Química Inorgánica, Cristalografía y Mineralografía"
Mostrando ítems 1-20 de 502
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2D Corrugated Magnesium Carboxyphosphonate Materials: Topotactic Transformations and Interlayer “Decoration” with Ammonia
Demadis, Konstantinos D.; Famelis, Nikos; Cabeza-Díaz, Aurelio
; García-Aranda, Miguel Ángel; Pérez-Colodrero, Rosario Mercedes; Infantes-Molina, Antonia[et al.] (American Chemical Society, 2012-06-29)
In this paper we report the synthesis and structural characterization of the 2D layered coordination polymer Mg(BPMGLY)(H2O)2 (BPMGLY = bis-phosphonomethylglycine, (HO3PCH2)2N(H)COO2−). The Mg ion is found in a slightly ... -
4D Early Age Cement Hydration Analysis by Ptychographic X-ray Computed Tomography and Machine Learning Segmentation
Shirani, Shiva; Cuesta-García, Ana María; Díaz, Ana; García-Aranda, Miguel Ángel; Trtik, Pavel; Holler, Mirko[et al.] (2022-06)
Cement manufacturing is responsible for ~7% of the anthropogenic CO2 emissions and hence, decreasing the CO2 footprint, in a sustainable, safe and cost-effective way, is a top priority. To fully understand the binder main ... -
4D nanoimaging of early age cement hydration.
Shirani, Shiva; Cuesta-García, Ana María; Morales-Cantero, Alejandro; Santacruz-Cruz, María Isabel; Díaz, Ana; Trtik, Pavel; Holler, Mirko; Rack, Alexander; Lukic, Bratislav; Brun, Emmanuel; Salcedo, Inés R.; García-Aranda, Miguel Ángel[et al.] (Springer Nature, 2023-05-08)
Despite a century of research, our understanding of cement dissolution and precipitation processes at early ages is very limited. This is due to the lack of methods that can image these processes with enough spatial ... -
4D nanoimaging of Portland cement hydration.
Shirani, Shiva; Cuesta, Ana; Díaz, Ana; Trtik, Pavel; Holler, Mirko; Rack, Alexander; Lukic, Bratislav; Brun, Emmanuel; García-Aranda, Miguel Ángel[et al.] (2024)
Portland cements are environmentally contentious, accounting for ≈8% of the anthropogenic CO2 emissions. The understanding of the cement hydration reactions (dissolution and precipitation processes) is important to contribute ... -
A novel multilaminated composite cathode for solid oxide fuel cells.
Dos-Santos-Gómez, Lucía; Porras-Vázquez, José Manuel; Martín-Jiménez, Francisco de Paula; Ramos-Barrado, José Ramón; Ramírez-Losilla, Enrique; Marrero-López, David[et al.] (Elsevier, 2019-05-28)
A novel electrode architecture consisting in alternating layers of La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and Ce0.9Gd0.1O1.95 (CGO) is prepared for the first time by spray-pyrolysis deposition and investigated as cathode material ... -
A review on recent advances and trends in symmetrical electrodes for solid oxide cells.
Zamudio-García, Javier; Caizán-Juanarena, Leire; Porras-Vázquez, José Manuel; Ramírez-Losilla, Enrique; Marrero-López, David (Elsevier, 2021-12-04)
Symmetrical solid oxide cells (SSOCs) with identical air and fuel electrodes have gained significant scientific interest in the last decade because they offer several advantages over conventional cell configurations. ... -
A Self-Folding Polymer Film Based on Swelling Metal–Organic Frameworks
Troyano, Javier; Carné-Sánchez, Arnau; Pérez-Carvajal, Javier; León-Reina, Laura; Imaz, Inhar; Cabeza-Díaz, Aurelio; Maspoch, Daniel[et al.] (Wiley-VCH Verlag GmbH & Co., 2018-10-23)
Herein, we exploit the well-known swelling behaviour of metal–organic frameworks (MOFs) to create a selffolding polymer film. Namely, we show that incorporating crystals of the flexible MOF MIL-88A into a polyvinylidene ... -
Accuracy in Cement Hydration Investigations: Combined X-ray Microtomography and Powder Diffraction Analyses
Salcedo, Inés R.; Cuesta-García, Ana María; Shirani, Shiva; León-Reina, Laura; García-Aranda, Miguel Ángel (MDPI, 2021-11-17)
Cement hydration is a very complex set of processes. The evolution of the crystalline phases during hydration can be accurately followed by X-ray powder diffraction data evaluated by the Rietveld method. However, accurate ... -
Accuracy in cement hydration investigations: Combined X-ray microtomography and powder diffraction analyses
Salcedo, Inés R.; Cuesta-García, Ana María; Shirani, Shiva; León-Reina, Laura; García-Aranda, Miguel Ángel (2022-06)
Cements are multi-phase materials that can be well understood using a multi-technique approach. Furthermore, the hydration of cement pastes is a very complex set of processes. In this work, we focus on the accuracy of the ... -
Accuracy in Rietveld quantitative phase analysis: a comparative study of strictly monochromatic Mo and Cu radiations
León-Reina, Laura; García-Maté, Marta; Álvarez-Pinazo, Gema; Santacruz-Cruz, María Isabel; Vallcorba, Oriol; Gómez-de-la-Torre, María de los Ángeles; García-Aranda, Miguel Ángel[et al.] (Willey online Library, 2016)
This study reports 78 Rietveld quantitative phase analyses using Cu K 1, Mo K 1 and synchrotron radiations. Synchrotron powder diffraction has been used to validate the most challenging analyses. From the results for ... -
Activation of LC3 binders by C-S-H nucleation seeding with a new tailored admixture for low-carbon cements.
Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Mazanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (Ernst & Sohn GmbH, 2023-12-06)
The use of supplementary cementitious materials is currently the most favorable strategy for reducing CO2 emissions in cements. Limestone Calcined Clay Cements, LC3, are a type of cement that allows the reduction of CO2 ... -
Activation of LC3 binders by C-S-H nucleation seeding with a new tailored admixture for low-carbon cements.
Cuesta-García, Ana María; Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel; Manzanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (2023)
The use of supplementary cementitious materials is currently the most favorable strategy for reducing CO2 emissions in cements. Limestone Calcined Clay Cements, LC3, are a type of cement that allows the reduction of CO2 ... -
Activation of LC3 low-carbon cements by C-S-H seeding.
Morales-Cantero, Alejandro; Gómez-de-la-Torre, María de los Ángeles; Cuesta-García, Ana María; Santacruz-Cruz, María Isabel; Mazanec, Oliver; Dalla-Libera, Alessandro; Dhers, Sebastien; Schwesig, Peter; Borralleras, Pere; García-Aranda, Miguel Ángel[et al.] (2023)
Portland-based Limestone Calcined Clay Cements (LC3) are attracting a lot of the attention from scholars and field applications due to the reduction in CO2 emissions. However, their low mechanical strengths at early ages ... -
Active layers based on vertically aligned nanostructures for SOFC applications
Zamudio-García, Javier; Chiabrera, Francesco; Losilla, Enrique R.; Marrero-López, David; Pryds, Nini; Esposito, Vincenzo[et al.] (2022-06-28)
One of the most recent strategies to enhance the electrode performance is preparing composite materials leading to an increase of the triple-phase-boundary (TPB) length. In this work, thin films VANs based on ... -
Active site engineering for heterogeneous catalysis using emerging nano-structured materials
(2016-06-02)The growing concern about the depletion of oil has spurred worldwide interest in finding alternative feedstocks for important petrochemical commodities and fuels. On the one hand, the enormous re-serves found (208 trillion ... -
Active Sulpho-belite cements. Hydration mechanisms and mechanical properties
(Servicio de Publicaciones y Divulgación Científica, 2015)The threat of climate change is considered one of the major environmental challenges for our society, where carbon dioxide (CO2) is one of the main Greenhouse gases (GHGs). Every ton of ordinary Portland cement (OPC) ... -
Advanced 3D nanoimaging of cement paste hydration using synchrotron Xray ptychographic tomography
Shirani, Shiva; Cuesta, Ana; Santacruz-Cruz, María Isabel; Gómez-de-la-Torre, María de los Ángeles; Diaz, Ana; Trtik, Pavel; Holler, Mirko; García-Aranda, Miguel Ángel[et al.] (2024-06-25)
Hydration of Portland cements (PC) is a complex phenomenon caused by the presence of multiple components with multi-length scale variability. To investigate this complicated process, state-of-theart 3D nanoimaging ... -
Advanced quantitative synchrotron X-ray imaging of cement micro- and meso- structures
(UMA Editorial, 2023)La tesis se centra en la investigación relacionada con la producción y el comportamiento de varios tipos de cemento, particularmente el cemento Portland y los cementos belíticos, así como los cementos de aluminato cálcico. ... -
Advanced synchrotron studies of ye'elimite-based cement pastes
García-Aranda, Miguel Ángel; Cuesta-García, Ana María; Gómez-de-la-Torre, María de los Ángeles; Santacruz-Cruz, María Isabel (2018-07-18)
Synchrotron characterization techniques [1] are being used to study Portland-based cements and recently also CSA and related cements. A key property of these techniques is that they do not require sample preparation, so ... -
Ajuste de las propiedades estructurales de molibdatos de lantano a través de la modificación de los entramados catiónicos y aniónicos
Porras-Vázquez, José Manuel; Bergillos-Ruíz, Marta; López Vergara, Adrián; Marrero-López, David; Losilla, Enrique R. (2018-06-28)
Los materiales basados en molibdatos de lantano, con fórmula general La6-xMoO12-, son candidatos a membranas de separación de hidrógeno debido su conductividad electrónica y protónica. Estos cristalizan en diferentes ...