Carbon and Nitrogen Co-doped TiO2 with Enhanced Visible-Light Photocatalytic Activity

To utilize visible light more efficiently in photocatalytic reactions, carbon-doped TiO2, nitrogen-doped TiO2, and carbon and nitrogen co-doped TiO2 nanoparticles with different nitrogen and carbon contents were prepared by a sol−gel method and characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV−vis spectroscopy

Daimei Chen; Zhongyi Jiang; Jiaqing Geng; Qun Wang; Dong Yang

2007

Scholarcy highlights

  • To utilize visible light more efficiently in photocatalytic reactions, carbon-doped TiO2, nitrogen-doped TiO2, and carbon and nitrogen co-doped TiO2 nanoparticles with different nitrogen and carbon contents were prepared by a sol−gel method and characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV−vis spectroscopy
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  • XRD results showed that the doping of C and N atoms could suppress the crystal growth of TiO2, and the effect of C doping was more pronounced than that of N doping
  • XPS, UV−vis spectroscopy, and lattice parameter analysis revealed that N atoms could incorporate into the lattice of anatase through substituting the sites of oxygen atoms, while most C atoms could form a mixed layer of deposited active carbon and complex carbonate species at the surface of TiO2 nanoparticles
  • The photocatalytic activities of obtained C−TiO2, N−TiO2, and C−N−TiO2 samples with different C and N contents were evaluated by methylene blue degradation under visible light irradiation
  • It was found that C−N−TiO2 nanomaterials exhibited the highest photocatalytic activity, which could be assigned to the synergistic effect of doped C and N atoms
  • The Journal of Physical Chemistry C2009,113 , 12489-12494

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