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Spectra analysis and O2 evolution for TiO2 photocatalyst compounded with indirect transition semiconductors

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Abstract

The photo absorbing, photo transmitting and photoluminescence performances of TiO2 photocatalysts compounded with V2O5 or WO3 were investigated by UV-Vis spectra, transmitting spectra, and PL spectra, respectively. The energy band structures of TiO2 photocatalysts were analyzed. The photocatalytic activities of the TiO2 photocatalysts were investigated by splitting of water for O2 evolution. The results indicate that the band gaps of WO3 and V2O5 are about 2.8 and 2.14 eV, respectively, and the band gap of rutile TiO2 is about 3.08 eV. Speeds of water splitting for 2%WO3-TiO2 and 8%V2O5-TiO2 photocatalysts are 420 and 110 μmol/(L·h), respectively, under UV light irradiation. V2O5 and WO3 compounded with suitable concentration can improve the photocatalytic activity of TiO2 with Fe3+ as electron acceptor.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Hai-xia Tong  (童海霞) & Li-yuan Chai  (柴立元)

  2. College of Chemistry and Biology Engineering, Changsha University of Science and Technology, Changsha, 410114, China

    Hai-xia Tong  (童海霞) & Xin-rui Zhang  (张馨睿)

Authors
  1. Hai-xia Tong  (童海霞)
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  2. Li-yuan Chai  (柴立元)
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  3. Xin-rui Zhang  (张馨睿)
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Correspondence to Hai-xia Tong  (童海霞).

Additional information

Foundation item: Project(11JJ5010) supported by the Natural Science Foundation of Hunan Province, China; Project(2011RS4069) supported by the Planned Science and Technology Program of Hunan Province, China; Project supported by the Postdoctoral Science Foundation of Central South University, China

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Tong, Hx., Chai, Ly. & Zhang, Xr. Spectra analysis and O2 evolution for TiO2 photocatalyst compounded with indirect transition semiconductors. J. Cent. South Univ. 19, 2425–2433 (2012). https://doi.org/10.1007/s11771-012-1292-y

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  • DOI: https://doi.org/10.1007/s11771-012-1292-y

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