Preparation and characterization of platinum doped porous titania nanoparticles for photocatalytic oxidation of carbon monoxide

TiO(2) samples doped with platinum oxide were obtained by using a sol-gel low temperature approach. The photocatalytic oxidation of CO in the presence of O(2) was monitored to study the influence of the Pt doping on the photocatalytic degradation performance of TiO(2). The obtained results were compared with those obtained with TiO(2) Degussa (P-25). Photocatalytic studies of the prepared mesoporous Pt/TiO(2) nanoparticles for the photooxidation of CO revealed notable photocatalytic activity, which was 3 times higher than that of Pt photodeposited onto commercial TiO(2) Degussa P-25. Also quantum yield for CO(2) formation for mesoporous Pt/TiO(2) calcined at 500 degrees C is higher than that of Pt photodeposited onto commercial TiO(2) Degussa P-25 by about three times. The structure and textural properties Pt/TiO(2) were studied by X-ray powder diffraction (XRD), N(2) adsorption (BET), Transmission electron microscopy (TEM) and UV. (C) 2011 Elsevier B.V. All rights reserved.