title: Photocatalytic activity of TiO2 containing anatase nanoparticles and rutile nanoflower structure consisting of nanorods.
abstract: A series of TiO2 with different crystal phases and morphologies was synthesized via a facile hydrothermal process using titanium n-butoxide and concentrated hydrochloric acid as raw materials. The photocatalytic activity of the samples was evaluated by degradation of Methyl Orange in aqueous solution under UV-Visible light irradiation. On the basis of detailed analysis of the characterizing results of high-resolution transmission electron microscopy, X-ray powder diffraction measurements, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller measurement, it was concluded that the photo-activity of the catalyst is related directly to the 3D morphology and the crystal phase composition. An excellent catalyst should have both a rutile 3D flower-like structure and anatase granulous particles. The 3D flower-like structure could enhance light harvesting, as well as the transfer of reactant molecules from bulk solution to the reactive sites on TiO2. In addition, the optimum anatase/rutile phase ratio was found to be 80:20, which is beneficial to the effective separation of the photogenerated electron-hole pairs.
authors.forename: Zhiqiao
authors.initials: Z
authors.lastname: He
authors.forename: Qiaolan
authors.initials: Q
authors.lastname: Cai
authors.forename: Huiying
authors.initials: H
authors.lastname: Fang
authors.forename: Gaohua
authors.initials: G
authors.lastname: Situ
authors.forename: Jianping
authors.initials: J
authors.lastname: Qiu
authors.forename: Shuang
authors.initials: S
authors.lastname: Song
authors.forename: Jianmeng
authors.initials: J
authors.lastname: Chen
mesh_terms: D001391:Azo Compounds; D002384:Catalysis; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects; D056951:Photoelectron Spectroscopy; D010782:Photolysis; D013472:Sunlight; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; C009495:titanium dioxide; C100258:methyl orange; D014025:Titanium