Phase transformation in semi-transparent TiO2 films irradiated with CO2 laser

Anatase (TiO2) thin films were obtained by immersion of glass plates into a titanium sol–gel precursor followed by calcination at 450 °C for 3 h. The Raman results for the CO2 laser irradiated TiO2 films show that laser radiation is able to promote favorable changes of anatase phase in anatase/rutile mixtures. Nevertheless, the transformation process level depends on laser characteristics and scan speed of the radiation treatment.

► Anatase thin films prepared by sol–gel method and calcination.
► Anatase phase transformed partially to rutile by CO2-laser irradiation.
► Anatase/rutile mixture as a reference photo-catalytic material.
► dPhoto-catalyst for degradation of organic compounds.