Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"hierarchical porosity"”.
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Novel carbon materials with hierarchical porosity : templating strategies and advanced characterization
… materials with high surface area, exhibiting a hierarchical pore system in the macro- and mesorange. Such a pore system facilitates the transport through the material and enhances the interaction with the carbon matrix (macropores are pores with diameters > 50 nm, mesopores between 2 – 50 nm). …
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Chimie Intégrative dédiée aux morphosynthèses de matériaux composites multi-échelles et étude de leurs applications en photoluminescence, photocatalyse et photovoltaïque
… macroscopic fibers or films which possess a hierarchical porosity. This organization allows the optimization of the matter transport (liquid/gaz) for air depollution application (photocatalysis) or dye-sensitized solar cells. In another project, we were able to control the alignment of zinc …
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Hydrothermal stability of hierarchically-structured two-dimensional MFI zeolite nanosheets
… in a pillared or intergrown form they exhibit a hierarchical porosity. Despite the tremendous effort directed towards their synthesis, very limited knowledge is available on their hydrothermal stability under industrially-relevant conditions. The hydrothermal stability of the thin crystalline …
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Understanding the Structure-Property Relationships of Highly Well-Defined Metal Nodes over MIL-100(Cr) and its Derivatives
… is rationalized by the higher surface area, hierarchical porosity, accessible, and large volumetric density of adsorbed oxygen species, as well as improved reducibility, that are crucial to the enhancement and effectiveness of catalytic properties that are not commonly seen in the bulk …
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Design of Robust Heterogeneous Catalysts for Sustainable Chemistry
… non-porous SiCN support. The issues of the low porosity of SiCN ceramics and the formation of metal silicides were addressed in the synthesis of Ni@SiCN materials. Controlled pyroylsis of Ni modified polysilazane at 600°C provided microporous Ni@SiCN materials, whereas at 1100°C the formation of …
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Polymerization in emulsion microdroplet reactors
… allows us to create 2D or 3D structures with hierarchical porosity. Oil, water, and surfactant liquid mixtures exhibit very complex phase behavior. Depending on the conditions, such mixtures give rise to highly organized structures. A proper selection of the type and concentration of …
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Enabling New Material and Process Capabilities for Ultraviolet-Assisted Direct Ink Write Additive Manufacturing via Exploration of Material Rheology and Reactivity
… enabled. With the use of additive manufacturing, hierarchical porosity on the macroscale is enabled in addition to the meso-scale porosity inherent to the aerogels.
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Rational Design of Poly(phenylene sulfide) Aerogels Through Precision Processing
… density and mechanical properties increases, and porosity decreased. The particular morphology of PPS aerogels from DPA was that of a fibrillar network, where these axialitic (pre-spherulitic) fibrils are comprised of stacks of PPS crystalline lamellae, as suggested by x-ray scattering and …