Author/Authors :
Giolli، نويسنده , , Carlo and Borgioli، نويسنده , , Francesca and Credi، نويسنده , , Alberto and Fabio، نويسنده , , Alberto Di and Fossati، نويسنده , , Alessio and Miranda، نويسنده , , Maurizio Muniz and Parmeggiani، نويسنده , , Silvia and Rizzi، نويسنده , , Gabriele and Scrivani، نويسنده , , Andrea and Troglio، نويسنده , , Sergio and Tolstoguzov، نويسنده , , Alexander and Zoppi، نويسنده , , Ange، نويسنده ,
Abstract :
TiO2 thin coatings were prepared, on various substrates, through evaporation of metallic titanium in an oxidizing atmosphere by modified electric arc-physical vapor deposition (EA-PVD). The coatings were characterized chemically (by means of XPS and SIMS) and from the structural point of view (by means of XRD and Raman spectroscopy), in order to understand the factors which lead to homogeneous coatings with high anatase content. The type of substrate is the main parameter that influences the crystal structure of the coatings: when stainless steel is used as substrate the coatings consist essentially of rutile, while on glass substrates coatings containing mainly anatase are obtained. The photocatalytic activity of the samples upon UVA irradiation was tested by using phenol as the target molecule. Phenol in the solution can be photocatalytically and rapidly degraded through the EA-PVD anatase TiO2 coatings.
Keywords :
Raman spectroscopy , photocatalytic activity , TIO2 , X-ray photoelectron spectroscopy , Secondary ion mass spectrometry , physical vapor deposition , X-ray diffraction
