Nanocomposites and nanomaterials

Nanoscale photocatalytic layers with titania on stainless steel foil
Honcharov V.V.1, Zazhigalov V.O.2, Sanzhak O.V.2,  Brazhnyk D.V.2, Sawlowicz Z.3, Socha R.4, Gurgol J.4
1 State Establishment “Lugansk State Medical University”, st. Budivelnikiv 32, 93012 Rubizhne, Ukraine. 
E-mail: milostiprosim@i.ua
2 Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Kyiv, Ukraine.
3 Jagellonian University, Krakow, Poland.
4 J.Haber Institute of Catalysis and Surface Chemistry, PAS. Krakow, Poland.

The nanoscale photocatalytic layers with titania on stainless steel foil (SSF) were prepared by low temperature ionic implantation method. The samples with thickness 100 mm was treated by titanium ion flow under fluence 5·1017 cm-2. The synthesized composites were studied by means of traditional XRD, SEM, AFM and SAXS. The photocatalytic properties of the samples in degradation of benzene in aqueous solutions was determined under visible and UV irradiation.
The results of XRD, SEM and AFM methods of the prepared nanoscale layers showed the presence of initial austenite phase only and the change of the surface morphology. 
I.e. ionic implantation do not leads to formation of metal or its compound crystalline phase but the titanium particles introduction essentially impact on surface area and energy distribution.
The formation of TizOxNy, TixNy and TiyOx compounds in surface layer of implanted composites was established by XPS method. 
The higher efficiency of the implanted samples in photodegradation was shown at visible light than at UV-irradiation. So, the drastic difference between bulk TiO2 and titanium-implanted nanocomposites on the base of stainless steel was determined.      
The most active samples were composite treated at 200 and 300 °C (benzene conversion was 26 and 25 % respectively). 
	The perspective of some obtained nanocomposites use in environment protection processes was shown.