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Showing 1 to 20 of 31 for “"Mesoporous materials"”.
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Inclusion of Molybdenum into microporous and mesoporous materials
… Y types, large microporous cloverite, and mesoporous MCM-41. The large pore supports were used to produce catalysts that can accommodate catalysis reactions involving large molecules. The objective of this work is to study the preparation and characterisation of the molybdenum supported …
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Combined computational and neutron scattering studies of hydrocarbons confined in mesoporous materials
… the widespread industrial applications of mesoporous materials there is often little understanding of the dynamical processes within the catalytic pores. In fact the rate limiting step is often the diffusion of the reactants within the pores and so therefore to be able to quantify the …
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Nonaqueous synthesis of metal oxide nanoparticles and their assembly into mesoporous materials
… nonaqueous sol-gel process and the formation of mesoporous metal oxides using some of these nanoparticles as building blocks via evaporation induced self-assembly (EISA) technique. In the first part, the experimental procedures and characterization results of successful syntheses of crystalline …
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Mesoporous materials and nanostructured LiFePO4 as cathodes for secondary Li-ion batteries: synthesis and characterisation
… and new battery chemistries and electrode materials. The scope of this thesis is the development of new cathode materials for secondary Li-ion batteries and the assessment of their structural-morphological characteristics and electrochemical performance. Chapter I deals with the basic …
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Synthesis and characterization of micro- and mesoporous materials for low temperature selective catalytic reduction of nitrogen oxides
In summary, it has been shown during this study that bimetallic Fe and Mn containing catalysts can be prepared by wet impregnation and not by ion exchange because of the competition between two different metals at different oxidation number. Only a single metallic phase catalyst could be prepared …
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The use of novel mesoporous molecular sieve MCM-41 for the sorption and separation of neutral and overbased sulphonate and phenate lubricant detergents
… The development of large pore sized materials such as MCM-41 enables larger molecules to be separated by the process of size exclusion than by traditional zeolites. In this work, mesoporous materials were synthesised and characterised using powder x-ray diffraction and nitrogen …
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Supramolecular templating of mesoporous zirconia-based nanocomposite catalysts
… flexibly tailored. However, the zirconia-based materials typically have low surface areas and poorly controlled textural properties. This thesis reports on the design and synthesis of nanostructured zirconia-based materials through the development of supramolecular templating chemistry. The …
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Sillica Nanoporous Materials Adsorption and Release Study
… In this regard, a class of nanostructured materials called mesoporous silicates such as MCM-41, SBA-15 has attracted the attention of many scientists as drug delivery vehicles for their outstanding features like high surface area, high porosity, well-ordered, tunable nanometer pores and …
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Flexible and Versatile Soft Templates for Mesoporous Silicas and Organosilicas Based on Pluronic Block Copolymer Surfactants and their Mixtures
… on the synthesis of consolidated periodic mesoporous materials such as 2-D hexgonal ordered mesoporous silicas (SBA-15) as well as single-micelle-templated silica and organosilica nanotubes and nanospheres using triblock copolymer surfactants and their mixtures in the presence of a swelling …
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Small angle scattering characterisation of micellar systems and templated architectures
… in this thesis is the characterisation of mesoporous materials in the confined channels of larger porous materials. Periodic mesoporous organosilicas (PMOs) were synthesised within the channels of anodic alumina membranes (AAM) under different conditions, including drying rates and …
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Metal-triazolate frameworks for the capture of water vapor and ammonia
Metal-organic frameworks (MOFs) are emerging materials for applications in gas sorption and separations, however, they are widely believed to be unstable towards coordinating vapors such as water and ammonia due to often-rapid hydrolysis or substitution at the metal-ligand bond. Here, we describe a …
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Nanoporous hosts for the encapsulation of conductive nanostructured materials
… as host matrixes for incorporation of conducting materials at the nanometer scale. By designing nanoporous host structures we are trying to manipulate the growth process and the properties of the embedded conductive nanostructures. The focus is on liquid-crystal templated silica-based mesoporous …
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Development of tandem catalytic systems utilizing mesoporous silica nanoparticles
… used to synthesize these molecules. Using mesoporous materials, mesoporous silica nanoparticles, specifically, as supports and compartmentalization tools in tandem catalysis can increase recyclability and durability, making an even more efficient and green catalytic system. MSN makes an …
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Síntese e caracterização de materiais mesoporosos inorgânico-orgânicos para aplicação na adsorção de gás carbônico
… processes studied the adsorption technique using mesoporous materials are having enough focus. The family of the SBA is within these materials, which can be highlighted the SBA-15 and SBA-16 as structures with interesting textural properties. In the present work was carried out the synthesis of …
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Control of Long Range Orientation in Ordered Mesoporous Carbon Thin Films
Ordered mesoporous carbons are appealing for many application areas, where their function and performance depend critically on structure. Thus, alignment of these mesopores by scalable methods is of notable interest. Cooperative self-assembly provides a facile route to fabrication of ordered …
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Crystal engineering of mixed-ligand metal-organic frameworks
… gases. Advances in the design of these materials using the mixed ligand approach add to variation in structures and thus provide a further means of tailoring of properties. A novel two dimensional, mixed ligand MOF has been synthesised based on 1,3,5 benzenetricarboxylic acid, 4,4' …
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Processi di desolforazione mediante l'utilizzo di adsorbenti e catalizzatori solidi
… are hybrid organic/inorganic crystalline porous materials with unique characteristics with respect to other porous materials (i.e. carbons, silica and zeolites), such as the possibility of tuning the structure during the synthesis, very large surface areas, porosity and a fully accessible …
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New Approaches to the Synthesis of Porous and/or High Surface Area Transition Metal Oxides
… to the synthesis of high surface area and mesoporous keggin POM framework materials using amphiphilic PI-PDMAEMA block copolymers (A 3). The calcined mesoporous materials exhibit Keggin POM hexagonal pore structure with high keggin POM dispersion, improved surface area. These developed …
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DEVELOPMENT OF SUPPORTED COBALT CATALYST FOR FISCHER-TROPSCH SYNTHESIS
… Understanding and developing FTS catalysts using mesoporous materials are of main interest in the present work. In the first step, the research focused on developing Co-based catalyst supported on multiwalled carbon nanotubes (MWCNTs). The functionalization of CNTs and its impact on the …
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Impact of carbon micro/mesoporosity on the adsorption behavior of small molecules
… cost, and inertness of activated carbons, these materials have been the preferable substrate for remediation studies. The adsorption of mercury, radioactive materials, pesticides, and dyes from soil and water are only a few examples among others. Considerably less time has been dedicated to …
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