SYNTHESIS AND CHARACTERIZATION OF LA DOPED TIO, NANOPARTICLES INVESTIGATION OF THEIRBAND GAP AND PHOTOCATALYTICPROPERTIES

La doped TiO, was synthesized using TiCl, and La(NO3)3.6H2O as starting materials. The material was characterized by means of XRD, XRF, SEM, EDX, UV-Vis, BET-BJH analyses then tested as a photocatalyst in comparison with commercial Degussa TiO2. Results of characterization analyses showed that synthesized material was La Doped TiO, and it composed of anatase and a little rutile phases of TiO,. The band gap of the mater estimated to be 2.5 eV also its specific surface area and average pore diameter calculated to be and 59.3 m/g and 4.61 nm, respectively. Mesoporous La Doped TiO, showed much higher photocatalytic performance in eliminating of Direct red-27 dye as a model of pollutants under visible light compared to commercial TiO, (Degussa P25). However Degussa TiO, exhibited better efficiency towards the dye under ultra violet light.

کلیدواژه ها:

TiO ، sol-gel ، nanoparticles ، band gap ، La ، nanoparticle ، mesoporous material