Synthesis and photocatalytic activity of TiO2 / Ti heterostructures
Abstract
The heterostructure TiO2 / Ti with developed surface based on titanium foil was obtained by the chemical structuring and subsequent annealing. The surface of heterostructure formed by the quasi-ordered massive consists of nanowires with average diameter about 55 nm. According to the results of X-ray diffraction analysis and Raman spectroscopy, the formation of a thin structured oxide layer consisting of a mixture of polymorphic modifications of TiO2 – anatase and rutile – on the surface was established herewith anatase-dominated. The photocatalytic activity of the heterostructure TiO2 / Ti against the model pollutant methylene blue in aqueous solution under UV-irradiation (365 nm) activation has been established at 9 % in 50 min, which is a good value for thin films. The obtained structured photocatalytically active titanium dioxide layers can be used in portable water and air purification devices and, due to the highly developed surface, become the basis for sensor devices and materials for plasmonics.
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