Citation:
LIU Su-Qin, DAI Gao-Peng, LIANG Ying, LIU Hua-Jun, LIANG Gui-Jie. Fabrication and Visible-Light Photocatalytic Activity of In situ Carbon and Nitrogen Co-Doped TiO2 Hollow Sphere[J]. Acta Physico-Chimica Sinica,
;2013, 29(03): 585-589.
doi:
10.3866/PKU.WHXB201212253
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Carbon and nitrogen co-doped TiO2 hollow spheres (CNTHs) were synthesized by hydrothermal treatment of titanium carbonitride (TiCN) in a mixture of H2O2, HF, ethanol, and water. CNTHs were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and UV-visible (UV-Vis) diffuse reflectance spectroscopy. Some of the carbon and nitrogen from TiCN was doped into the lattice of TiO2 in situ, and some carbon atoms were incorporated into the interstitial positions of the TiO2 lattice. The CNTHs exhibited enhanced absorption over the whole visible-light region and an obvious red shift at the absorption edges compared with that of TiO2. The ability of the CNTHs to degrade methylene blue (MB) in aqueous solution under visible light irradiation (λ≥400 nm) was investigated. The CNTHs showed much higher photocatalytic activity than P25 in the degradation of MB because of the synergetic effects of their strong visible absorption and unique hollow sphere structure.
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