Resumen de Direct photodeposition of nanostructured tio2 thin films from b-diketonate complexes, and their photocatalytic behaviour

M. Tejos, G. E Buono-core, F. R. Diaz, M. A. del Valle, J Palomares

• Amorphous Titania thin films have been photochemically obtained by direct UV irradiation (254 nm) of an amorphous TiO(C6H5COCHCOCH3) 2 film spin-coated on Si(100) and borosilicate glass. These materials were characterized by scanning electron microscopy (SEM), X-ray diffraction spectroscopy (XRD) and Auger electron spectroscopy (AES). SEM analysis showed a porous film with irregular morphology (diameter < 300 nm), whereas the XRD spectrum showed that the as-deposited film was completely amorphous and was transformed by annealing under nitrogen into polycrystalline TiO2. Subsequently, amorphous Titania deposited on borosilicate glass was used in the photocatalytic decomposition of aniline in water. The photoreaction of aniline was monitored by UV in the presence of air and nitrogen, and the product was characterized by infrared spectroscopy (IR). The results showed that aniline can be photooxidized efficiently by the TiO2/ borosilicate system in the presence of oxygen