Sökning: "Aqueous chemical growth method"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden Aqueous chemical growth method.

  1. 1. A vibrational spectroscopy study of the growth of silicate-1 films on noble metal surfaces

    Författare :Vania Engström; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Chemical Technology; Kemisk teknologi;

    Sammanfattning : The main objective of this thesis was to acquire a better understanding of the mechanisms involved in the preparation of Silicalite-1 films in general and on gold surfaces in particular. Molecular sieve films on gold surfaces were prepared using the seed film method. LÄS MER

  3. 2. Synthesis and applications of low silica zeolites from Bolivian clay and diatomaceous earth

    Författare :Javier Gustavo Garcia Mendoza; Johanne Mouzon; Niklas Hedin; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zeolites; Synthesis; clay; diatomite; adsorption; ion exchange; Chemical Technology; Kemisk teknologi;

    Sammanfattning : The aim of the present work was to develop synthesis routes to produce synthetic zeolites with industrial attractiveness from non-expensive Bolivian raw materials, such as clays and diatomite. In particular, the work was focused on the synthesis of low-silica zeolites with the LTA and FAU structures. LÄS MER

  4. 3. Effects of polymeric surfactants on the crystallisation of inorganic materials

    Författare :Per Kjellin; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mesostructures; CdS; calcium carbonate; self-assembling phases; calcite; CaCO3; Ag; crystal polymorphs; nanostructures; surface active polymers; SrCO3;

    Sammanfattning : This thesis concerns effects of polymeric surfactants on the crystal growth of inorganic structures. The crystal growth of calcium carbonate on steel surfaces was studied with a heat exchanger cell and with an electrochemical method. LÄS MER

  5. 4. Synthesis and Properties of Colloidal Zeolite

    Författare :Brian J. Schoeman; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Several zeolite phases, zeolite N-Y, N-A, ZSM-2, (hydroxy)sodalite and TPA-silicalite- 1, have been synthesized in the form of stable suspensions of discrete colloidal crystals wherein the average particle size is less than 150 nanometers and in certain cases, less than 50 nanometers, with a narrow particle size distribution, PSD. Clear homogeneous tetraalkylammonium (alumino)silicate solutions containing controlled amounts of alkali metal cations are hydrothermally treated at 100 °C without stirring and under reflux. LÄS MER

  7. 5. Nuclear Magnetic Resonance Methods to Study Soft Matter Dynamics and Microstructure

    Författare :Diana Bernin; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Soft matter is of great importance for food, hygiene and pharmaceutical products. Gels are an example of soft matter and are found in e.g. diapers, that are able to take up large amounts of liquids. LÄS MER