Search for dissertations about: "mesoporous materials"

Showing result 1 - 5 of 84 swedish dissertations containing the words mesoporous materials.

  1. 1. Nanostructured Catalysts and Electrode Materials for PEM Fuel Cells

    University dissertation from Chalmers University of Technology

    Author : Kjell Wikander; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk materialvetenskap; Materials science; Övrig teknisk materialvetenskap; Other materials science; Fuel cell; PEMFC; cathode; oxygen reduction; Pt; nanoparticles; microemulsion; phase transfer method; surfactants; carbon; silica; mesoporous; nanocasting; alkylamine; alkylthiol; electron microscopy;

    Abstract : The Polymer Electrolyte Membrane Fuel Cell (PEMFC) is a promising energy converting technology for powering automotives and electrical equipment using hydrogen gas as fuel and producing water as the only exhaust. The active carbon-supported platinum catalyst present in the electrodes limits the maximum power generation in state-of-the-art PEMFCs due to platinum’s poor activity for the oxygen reduction reaction (ORR) taking place at the cathode. READ MORE

  2. 2. Formation of mesostructured silica based on non-ionic interactions

    University dissertation from Chalmers University of Technology

    Author : Andreas Sundblom; Chalmers tekniska högskola.; Chalmers University of Technology.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Yt- och kolloidkemi; Surface and colloid chemistry; Materialkemi; Materials chemistry; Funktionella material; Functional materials; Mesoporous silica; inorganic silica; non-ionic block co-polymer; silica-PEO interaction; colloidal suspension; formation mechanism; SBA-15.;

    Abstract : Mesostructured silica is a material consisting of a silica matrix with an organization in the meso range of 2-50 nm. The silica matrix is most often amorphous while the organization, induced by a structure directing agent, may generate a long-range mesoorder. READ MORE

  3. 3. Enzyme Immobilization in Mesoporous Silica

    University dissertation from Chalmers University of Technology

    Author : Hanna Gustafsson; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Enzymteknik; Enzyme engineering; Funktionella material; Functional materials; Mesoporous; silica; pore size; particle morphology; immobilization; encapsulation; enzyme; lipase; trypsin; feruloyl esterase;

    Abstract : Catalysts are widely used in many industries for production of chemicals, pharmaceuticals, fuels and energy. There is a need for more sustainable production processes, with reduced energy and raw material consumption together with a reduction in waste and toxic by-products. READ MORE

  4. 4. New Materials for Environmental Applications:Thermoelectrics and Low-Temperature Oxidation Catalysts

    University dissertation from Chalmers University of Technology

    Author : Ali Saramat; Chalmers tekniska högskola.; Chalmers University of Technology.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Övrig teknisk materialvetenskap; Other materials science; phonon glass-electron crystal; thermoelectricity; clathrate; Czochralski; YMn4Al8; figure-of-merit ZT ; mesoporous; heterogeneous catalysis; selective oxidation; noble metals;

    Abstract : New materials have been researched for environmental applications as thermoelectrics and low-temperature oxidation catalysts. One of the main objectives of this thesis was to prepare and characterize new efficient thermoelectric materials (TM’s). READ MORE

  5. 5. Functional Ceramics in Biomedical Applications On the Use of Ceramics for Controlled Drug Release and Targeted Cell Stimulation

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Johan Forsgren; Uppsala universitet.; [2010]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Controlled release; geopolymer; sol-gel; opioid; oral administration; oral dosage form; implant; titanium; hydroxyapatite; infection; strontium carbonate; strontium; TECHNOLOGY Materials science Functional materials; TEKNIKVETENSKAP Teknisk materialvetenskap Funktionella material; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik; Engineering Science with specialization in Nanotechnology and Functional Materials; Teknisk fysik med inriktning mot nanoteknologi och funktionella material;

    Abstract : Ceramics are distinguished from metals and polymers by their inorganic nature and lack of metallic properties. They can be highly crystalline to amorphous, and their physical and chemical properties can vary widely. READ MORE