"Nanocomposites and nanomaterials"

New photocatalytic materials prepared by low temperature ion implantation method
Olena Sanzhak1, Dmytro Brazhnyk1, Vitaliy Goncharov2, Olena Sachuk1, Fedir Azimov1, Valeriy Zazhigalov1.
1 Institute for sorption and problems of endoecology, NASU, General Naumov str. 03164, Kyiv, Ukraine 
E-mail: Sanzhakalena@bigmir.net
2 State Establishment, Lugansk State Medical University, Rubizhne, Ukraine.

Photocatalysis is one of the environmental friendly technologies for the reprocessing of toxic organic pollutants directly under the influence of solar radiation. At present, great attention is paid to the use of titanium dioxide as an effective photocatalyst for hazardous substances destruction [1, 2]. The disadvantages of this catalyst are its preference absorption in UV radiation, which is only 5% of the entire spectrum of sunshine and its usage in form of dispersed powders. Therefore, the photocatalysts deposited on support are promising, and the creation of the supported samples where can be used both mechanically strong granules (1-5 mm) and flat profile composites (metallic foil or ceramic) as supports. In this work, the stainless steel foil was used as support, and titanium was deposited on this surface by means of the method of low-temperature ion implantation. The implantation dose was 1018 ions/cm2 in nitrogen atmosphere. The formation of MeOxNy nanolayers (100-200 nm) in dependents of post-treatment temperature was observed by SEM. The UV-Vis spectroscopy shown shifts to the visible range all of samples calcined at 300-500°C on air.
The photocatalytic activity of the samples was studied in water solutions of organic pollutants using visible sours of irradiation in closed circulating system. It was shown that the post-treatment temperature strongly influences on safranine T and benzene degradation rate.

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2.	Thompson, T. L., Yates, J. T. Surface Science Studies of the Photoactivation of TiO2New Photochemical Processes // Chem. Rev.-2006.-106.-P. 4428-4453.