Listar Química Inorgánica, Cristalografía y Mineralografía - (QICM) por título
Mostrando ítems 410-429 de 456
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Tailored novel phosphonate-based hybrid materials by design for diverse applications
(2018-10-02)Hybrid materials are composed of an organic and an inorganic part, placed together in such a way that the final product has defined structures and properties. Among the plethora of hybrid materials, coordination polymers ... -
Tailored setting times with high compressive strengths in bassanite calcium sulfoaluminate eco-cements
(Elsevier, 2016-09)This work deals with the hydration of a calcium sulfoaluminate (CSA) eco-cement prepared with bassanite and different additives (type and content) at a fixed water/CSA ratio of 0.5. Pastes prepared with bassanite show high ... -
Tailoring basic and acidic properties of MgAl hydrotalcite by fluoride anions: Effect on glycerol oligomerisation
(Elsevier, 2023)In this work, two families of catalysts based on mixed metal oxides derived from MgAl hydrotalcites were synthesized with a Mg/Al molar ratio of 3. On the one hand, in the first family, the fluoride anion was incorporated ... -
Tailoring the selectivity of Cu-based catalysts in the furfural hydrogenation reaction: Influence of the morphology of the silica support
(Elsevier, 2022)Cu nanoparticles were incorporated on different porous silica supports (commercial silica, SBA-15 synthesized both at room temperature and under hydrothermal conditions, and mesocellular foam) by the strong electrostati ... -
The effect of mechanochemistry on the preparation of heterogeneous catalysts: Reduction of furfural to obtain furfuryl alcohol.
(2023)In this context, mechanochemistry is receiving increasing attention for the synthesis of many chemical compounds in the solid state, considered by IUPAC as one of the 10 methodologies to change the world.Mechanochemistry ... -
The photogrammetry method and 3D virtualization technology as a learning tool in the flipped classroom at COVID-19 time.
(IATED Academy/I. Gómez Chova, A. López Martínez, I. Candel Torres, 2021-03)From 2016-2017 academic year, The “Flipped Classroom” pedagogical methodology was launched in the Crystallography and Mineralogy subject of the Chemical degree in the University of Malaga (UMA). The application of the ... -
The Role of Copper in the Hydrogenation of Furfural and Levulinic Acid
(IOAP-MDPI, 2023-01-26)Currently, there is a great interest in the development of sustainable and green technologies for production of biofuels and chemicals. In this sense, much attention is being paid to lignocellulosic biomass as feedstock, ... -
The role of nitride species in the gas-phase furfural hydrogenation activity of supported nickel catalysts
(Elsevier B.V., 2020-03-11)A series of C-rich nickel nitride nanoparticles supported on silica has been prepared by the urea glass route, with urea as nitrogen and carbon source, and characterized by different physico-chemical techniques. They consist ... -
The role of sodium and sulfate sources on the rheology and hydration of C3A polymorphs
(Elsevier, 2022)The higher reactivity of orthorhombic C3A (ort-C3A) in sulfate-containing solutions, compared with cubic C3A (cb-C3A), was previously related to the differences in crystal structure or the sodium in the ort-C3A pore solution. ... -
The use of mo and cu monochromatic radiations for quantitative phase analysis: study of the accuracy
(2016-06-27)Cement hydration is a very complex process in which crystalline phases are dissolving in water and after supersaturation hydrated crystalline and amorphous phases precipitate. Great efforts are being made to develop ... -
Three-Component Copper-Phosphonate-Auxiliary Ligand Systems: Proton Conductors and Efficient Catalysts in Mild Oxidative Functionalization of Cycloalkanes
(ACS publications, 2018-08-13)The synthesis, structural characterization, topological analysis, proton conductivity, and catalytic properties are reported of two Cu(II)-based compounds, namely a dinuclear Cu(II) complex [Cu2(μ-VPA)2(phen)2(H2O)2]· 8H2O ... -
Time-dependent monitoring of cement hydration by combined laboratory x-ray microtomography and powder diffraction
(2022-06-30)Following the reaction degree of amorphous phases in cements is very challenging. It becomes even harder when some additions (supplementary cementitious materials) are employed. Nowadays, calcined clays are attracting a ... -
Transformaciones hidrotermales de la caolinita
(Universidad de Málaga, Servicio de Publicaciones, 2003)El objetivo de este trabajo es investigar experimentalmente las transformaciones de la caolinita en condiciones similares a la diagénesis profunda-metamorfismo de bajo grado o a las condiciones hidrotermales, en sistemas ... -
Transformaciones microtexturales de esmectita a illita, en presencia de amonio
(Macla, 2022)Durante la diagénesis se producen reacciones que afectan a los filosilicatos y a la materia orgánica, que lleva a la fijación de NH4 en las illitas (Ill) y en las micas. Además, las esmectitas (Sm) sufren reorganizaciones ... -
Transition metal hydroxyphosphonoacetates as precursors of electrocatalysts
(2021-01-29)Coordination polymers (PCs) are widely studied due to their applicability in many fields. Among them, metal phosphonates are attractive materials due to their great structural and functional diversity, as proton conductors ... -
Tunable crystal structure and proton conductivity of lanthanide nitrilotrismethylphosphonates
(2018-10-01)Metal phosphonates are multifunctional solids with remarkable stability and proton conducting properties owing to their structure is usually composed of extended hydrogen-bond networks that favor proton transfer pathways ... -
Tunable electrode architectures for La0.8Sr0.2Fe1-xTixO3-δ based Symmetrical Solid Oxide Fuel Cells.
(2021-07-18)The efficiency of SOCF electrodes can be improved by optimizing the microstructure from alternative preparation methods, such as infiltration and nanostructured electrodes deposited at low temperature. ... -
Tuning Proton Conductivity in A Multifunctional Calcium Phosphonate Hybrid Framework
(2014-06-25)Multi-chelating phosphonate ligands are organic linkers alternative to polycarboxylates and other ligands providing synthetic access to a number of thermally- and chemically-stable MOFs [1]. Metal phosphonates are amenable ... -
Tuning Proton Conductivity in Alkali Metal Phosphonocarboxylates by Cation Size-Induced and Water-Facilitated Proton Transfer Pathways
(American Chemical Society, 2014-12-20)The structural and functional chemistry of a family of alkali-metal ions with racemic R,S-hydroxyphosphonoacetate (M-HPAA; M = Li, Na, K, Cs) are reported. Crystal structures were determined by X-ray data (Li+, powder ... -
Tuning Proton Conductivity Properties of Lanthanide Amino-Sulfophosphonates-Loaded Nafion Composite Membranes
(2017-07-05)Polymer-based electrolytes in proton exchange membrane fuel cells (PEMFCs) utilize acidic groups as proton carriers and hydrogen bonding networks as proton-conducting pathways to facilitate proton transport. Crystalline ...