[Zurück]

J. Geserick, N. Hüsing, U. Schubert:
"Synthesis of Mesoscopically Organized Nanoparticles";
Vortrag: 6. Workshop Anorganische Chemie in Österreich (6.WACÖ), Johannes Kepler Universität, Linz; 29.03.2010 - 30.03.2010; in: "Book of Abstracts", (2010), S. V18.

Among mesoporous transition metal oxides, crystalline porous titanium dioxide with a high surface area and high thermal stability is a very attractive material due to its well-known activity in catalytic reactions.
These materials can be achieved by sol-gel processes that are mostly proceeded in alcoholic- or organic solutions, whereas water-free routes have also been reported. In contrast, the preparation methodology presented here, bases on pure aqueaous conditions
leading to the formation of mesoporous, crystalline titania nanoparticles at low temperatures without an amorphous intermediate phase. Therefore, glycol-modified precursors were investigated with regard to their applicability in the synthesis of these nanoparticles. Being crystalline at room temperature, the glycol-modified precursors are easy to handle and stable in air for weeks.
The resulting nanoparticles show different properties dependent on the synthesis parameters, such as pH value and the employed surfactant. The samples were characterized by XRD, electron microscopy (TEM) and nitrogen sorption.

Projektleitung Ulrich Schubert:
Sol-Gel Beschichtungen zur Adsorption von Kontaminationen unter Weltraumbedingungen