Improving of Photocatalytic TiO2 Nanopowders Efficiency and Their Potential Applications

Author: Tsisana Gavasheli
Co-authors: G. Mamniashvili, G.Mamniashvili,T.Gegechkori, M.Nadareishvili,T.Zedginidze
Keywords: photocatalytic, absorption spectra, TiO2 nanopowders
Annotation:

The possibilities for changing the absorption spectra of photocatalytic TiO2 nanopowders were studied with the aim of using more efficiently the solar energy by increasing the absorption of UV light and involving the visible light into the catalytic process. At E. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, a unique low – temperature (50-600C) nanotechnology of deposition of Ni-B and Co-B nanoclusters on the surfaces of TiO2 nanopowders was developed. The use of this nanotechnology significantly improves the light absorption in the UV region. It was also revealed that, by further treatment of cluster-coated TiO2 nanopowders, we can increase the light absorption by these nanopowders in long-wave length regions. Particularly, under heat treatment of cluster-coated TiO2 nanopowders in vacuum, there was observed a detectable shift of absorption spectra of the powders under study towards the long-wavelength region, while the spectra of uncoated nanopowders did not change. The potential application of this photocatalytic powders in ecology and energetics will be discussed.

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Improving of Photocatalytic TiO2 Nanopowders Efficiency and Their Potential Applications [en]
TiO2 ნანოფხვნილების ფოტოკატალიზური თვისებების ეფექტურობის გაზრდა და მათი გამოყენება [ka]