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Abstract
In this work photocatalytic properties of TiO2 thin fi lms doped with 8.51 at. % of Nd were described. The self-cleaning phenomenon of thin fi lms was discussed together with the structural, optical and surface properties of prepared thin fi lms. Transparent coatings based on titanium dioxide were manufactured by high-energy reactive magnetron sputtering process. Incorporation of Nd during sputtering process results in amorphous behavior, without a signifi cant infl uence on transparency and colour as compared to the undoped TiO2-rutile matrix. Nevertheless, doping with neodymium doubles the photocatalytic activity of the matrix due to higher quantity of photo-generated charge carriers and more effi cient mechanism of energy transfer.
Highlights
Transparent thin films based on titanium dioxide are widely applied in coating industry, because TiO2 is being used for preparation of hydrophobic or hydrophilic films, self-cleaning coatings, optical filters or protective films[1,2,3,4,5]
The results have shown that as-deposited TiO2 matrix had the rutile structure with crystallites size of 8.7 nm
Thin films based on titanium dioxide were manufactured by a high-energy reactive magnetron sputtering process
Summary
The properties of TiO2 can be modified by selection of deposition parameters, doping with different elements or post-process treatment (i.e. annealing)[1,2,3,4,5,6]. By doping with rare earth elements thin films, which exhibit photoluminescence or have high photocatalytic activity can be manufactured[7,8,9]. TiO2 due to its photoluminescence properties in near-IR range[10]. It is an important material in the field of lasers technology. Like Eu3+ or Tb3+, incorporation of Nd3+ ions results in the increase of TiO2 photocatalytic activity due to a higher number of energy levels which can take part in energy transfer mechanism. Our previous works have shown that incorporation of RE-dopant into nanocrystalline
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