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Nitride-based materials in nanotechnologies
Dufek, V. ; Brožek, Vlastimil
The contribution draws attention to the research results of nitrides in the Czech Republic. The nanotechnology of TiN is on the world top, but the state of silicon and boron nitrides production where we in certain sense surpassed the world niveau deceased. PRAMET Šumperk does not continue in cubic BN and OVU Karlštejn in hexagonal BN development. The information from Bayreuth University indicates that nanoclusters of fullerene ACNR (Agregated Carbon NanoRods) can reach the hardness higher than that of diamond. The same is valid for boron nitride superhard materials.
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Photoactive catalyzers on WO3 basis
Domlátil, J. ; Mastný, L. ; Šrank, Z. ; Brožek, Vlastimil
Properties of tungsten trioxide photocatalysts with various oxygen stoichiometry have been studied. Samples have been prepared under low-temperature non-isothermal plasma conditions. Due to colourfulness of tungsten oxides the spectrophotometric determination of photoactivity to measuring colour changes has been preferred. The latter method is suitable for analysis of colourless TiO2 photocatalysts.
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