Tungsten and nitrogen co‐doped TiO2 nanobelts with significant visible light photoactivity

Tungsten and nitrogen co‐doped TiO2 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, resp...

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Bibliographic Details
Published inSurface and interface analysis Vol. 50; no. 2; pp. 146 - 153
Main Authors Chen, Hongjian, Wang, Longxuan, Guan, Lixiu, Ren, Hui, Zhang, Yingxin, Tao, Junguang
Format Journal Article
LanguageEnglish
Published Bognor Regis Wiley Subscription Services, Inc 01.02.2018
Subjects
Anatase
Doping
Electron microscopy
Nitrogen
Photoelectrons
photo‐catalysts
Synergistic effect
TiO2 nanobelts
Titanium dioxide
Titanium oxides
Tungsten
visible light activity
X-rays
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Summary:Tungsten and nitrogen co‐doped TiO2 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 2p 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 TiO2 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.
ISSN:0142-2421
1096-9918
DOI:10.1002/sia.6351