Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Polish Journal of Chemistry

2 2006

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Synthesis, Characterization and Photocatalytic Activity of Some TiO2/Carbon Composites

Kulesius Z., Valatka E.

Polish Journal of Chemistry

2006

Vol. 80, nr 2

335-344

Anatase-type TiO2 composites with various allotropic forms of carbon (carbon nanotubes, carbon nanofibers and activated carbon) were prepared and characterized by X-ray diffraction (XRD), nitrogen adsorption, thermogravimetry-differential scanning calorimetry (TG-DSC), Fourier-transform infrared (FT-IR) and scanning electron microscopy (SEM) analysis. The synthesis of TiO2/carbon composites was carried out by using acid-catalyzed sol-gel method, followed by drying in supercritical 2-propanol. The weight ratio mTiO2/mcarbon was 4 in all prepared samples. In order to compare the photoactivity of different catalysts, the phenol degradation was employed as a test reaction

Electrochemical Deposition of W-O-Se Thin Films on Polycrystalline Pt Electrode

Ancutiene I., Valatka E.

Polish Journal of Chemistry

2006

Vol. 80, nr 11

1889-1897

The possibility of electrochemical deposition of W- and Se-containing thin films on polycrystalline Pt electrode is demonstrated. Various electroanalytical techniques (linear sweep and cyclic voltammetry, chronopotentiometry, chronoamperometry) were used for the elucidation of some peculiarities of deposition process.An acidic electrolyte composed of selenious acid and tungsten(VI) peroxo complex in 0.3 M nitric acid was used for the synthesis. It was established that the as-depositedW-O-Se layers are amorphous and contain various amounts of tungsten and selenium, depending on synthesis conditions.