Photocatalytic behavior of heavy La-doped TiO2 films deposited by pulsed laser deposition using non-sintered target

We have investigated the control of photocatalytic behavior under deposited conditions of non-sintered target of different molar ratios with TiO 2 and La 2 O 3 from 1:0 to 1:2 for heavily La doping, and post-annealing temperature from 600 °C to 1000 °C for crystallizing by pulsed laser deposition. We have successfully crystallized heavily La-doped TiO 2 films with post-annealing temperature over 800 °C and with molar ratio of TiO 2 :La 2 O 3 over 1:1 on a quartz substrate. Heavily La-doped TiO 2 films are observed the decomposition of methylene blue and a water-splitting reaction in photocatalytic behavior under Xe light irradiation. When stoichiometric La-doped TiO 2 (TiO 2 :La 2 O 3 = 1: 1) is synthesized with heat-treatment at 900 °C, the best results are obtained under photocatalytic behavior and pure La 2 Ti 2 O 7 crystalline were obtained.