Synthesis and Photocatalytic Properties of In Situ Pd Doped TiO_2 Nanomaterial

TiO2 nanomaterials were prepared with in situ doped Pd by chemical dealloying Ti-Cu-Pd amorphous alloys. The TiO2 nanomaterials were characterized using SEM,TEM,XRD and EDS. The photocatalytic property was examined by degrading the organic dye RhB. The results showed that the TiO2 nanomaterial was composed of rutile phase. The TiO2 nanomaterials exhibitted nanoflower-like morphology. Each nanoflower comprised of some branch with length of several100 nm. Single branch was composed of lots of tiny nanorods with the mean diameter of5 ~15 nm along the direction which was perpendicular to(110) plane. These tiny nanorods grew along the [001]direction. The Pd content in the starting amorphous alloys had little influence on the doped Pd content in the TiO2 nanomaterials, but influenced the mean diameter of the TiO2 nanomaterials. With increasing Pd content in the starting amorphous alloys,the mean diameter of the TiO2 nanomaterials decreased. The TiO2 nanomaterials with in situ doped Pd exhibitted better photocatalytic property.