title: Synergistic effect of N- and F-codoping on the structure and photocatalytic performance of TiO2.
abstract: Three types of TiO2 nanostructures were synthesized via a facile hydrolysis method at 195°C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of TiO2 were investigated. The nanomaterials were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer-Emmett-Teller porosimetry, ultraviolet-visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra-violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase TiO2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure TiO2. Most importantly, more efficient photocatalytic activity under both ultra-violet and visible light was observed. The obtained N-F-TiO2 nanomaterial shows considerable potential for water treatment under sunlight irradiation.
authors: School of Energy and Power Engineering, Shandong University, Jinan 250061, China; School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China. Electronic address: chm_yujm@ujn.edu.cn.
authors: Jiemei
authors: J
authors: Yu
authors: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Zongming
authors: Z
authors: Liu
authors: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Haitao
authors: H
authors: Zhang
authors: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Taizhong
authors: T
authors: Huang
authors: School of Energy and Power Engineering, Shandong University, Jinan 250061, China.
authors: Jitian
authors: J
authors: Han
authors: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China; School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China.
authors: Yihe
authors: Y
authors: Zhang
authors: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
authors: Daohuang
authors: D
authors: Chong
mesh_terms: D005461:Fluorine / Q000737:chemistry*; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry / Q000528:radiation effects*; D009584:Nitrogen / Q000737:chemistry*; D010782:Photolysis; D014025:Titanium / Q000032:analysis / Q000528:radiation effects*
chemical_list: C009495:titanium dioxide; D005461:Fluorine; D014025:Titanium; D009584:Nitrogen
keywords: Anion doping; Nanoparticle; Photocatalyst; TiO(2) hydrolysis