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Tungsten and nitrogen co‐doped TiO 2 nanobelts with significant visible light photoactivity
Author(s) -
Chen Hongjian,
Wang Longxuan,
Guan Lixiu,
Ren Hui,
Zhang Yingxin,
Tao Junguang
Publication year - 2018
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6351
Subject(s) - x ray photoelectron spectroscopy , anatase , photocatalysis , visible spectrum , band gap , materials science , tungsten , doping , scanning electron microscope , hydrothermal circulation , photoelectric effect , spectroscopy , analytical chemistry (journal) , nanotechnology , chemical engineering , chemistry , optoelectronics , catalysis , physics , biochemistry , chromatography , quantum mechanics , engineering , metallurgy , composite material
Tungsten and nitrogen co‐doped TiO 2 nanobelts (W/N‐TNBs) have been successfully synthesized via 1‐step hydrothermal method. The structure, morphology, and composition of prepared samples were characterized by X‐ray diffraction, scanning electron microscopy, and X‐ray photoelectron spectroscopy, respectively. The prominent phase of all as‐prepared samples is anatase crystal. For samples with N doping, new energy states can be introduced on top of O 2 p states which reduced the band gap by 1.1 eV. The reduced band gap leads to efficient visible light activity. The 3%‐W/N‐TNBs were found to exhibit the highest activity. The photocatalytic performance of 3%‐W/N‐TNBs under visible light is about 4.8 times than that of pure TiO 2 nanobelts, which emphasizes the synergistic effect of W and N co‐doping for effectively inhibiting the recombination of photogenerated electrons and holes. In addition, our results testify the different redox potentials of the photoelectrons at different final states.

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