title: Preparation of fine, uniform nitrogen- and sulfur-modified TiO2nanoparticles from titania nanotubes.
abstract: TiO2nanoparticles modified with nitrogen and sulfur were prepared from titania nanotubes by a facile wet chemistry method. The samples synthesized with different thiourea/TiO2ratios showed a uniform nanoparticle size distribution centred at approximately 10 nm with a developed specific surface area of 246 m2g-1. These modified nanosized photocatalysts exhibited higher photocatalytic activity for the degradation of gaseous isopropanol than unmodified titania nanotubes under visible illumination. This could be attributed to the synergistic effects of a large specific surface area, strong absorption in the visible region, a redshift in the adsorption edge, and surface adsorption modification induced by nitrogen and sulfur compounds.
authors.affiliation: International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Grandcolas
authors.affiliation: Photocatalytic Materials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Ye
keywords: TiO2 doping; photocatalysis; titania nanotube modification