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Preparation and characterization of low-amount Yb3+-doped TiO2 photocatalyst

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Abstract

The nanoparticles of Yb3+-doped (0.125 wt.%) and pure TiO2 were prepared by an acid-catalyzed sol-gel method and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy, and surface photovoltage spectroscopy; the specific surface of the samples was measured using the Brunauer-Emmett-Teller (BET) method. The photocatalytic degradation of methylene blue in aqueous solution was used as a probe reaction to estimate the photocatalytic activity of the prepared nanoparticles. The photocatalytic activity of Yb3+/TiO2 composite nanoparticles is much higher than that of pure TiO2. A low amount of Yb3+ in TiO2 can inhibit the anatase-rutile phase transformation of TiO2, prevent grain growth increasing the specific surface area, and favor the high-temperature stabilization of the pores. According to the surface voltage spectroscopy data, Tb3+-doping prevents recombination of photoinduced electrons and holes and improves the light absorption capacity of the particle surface.

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Authors and Affiliations

  1. Research Center for Green Chemical Technology, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China

    H. Q. Jiang, P. Wang, X. L. Guo & H. Z. Xian

  2. Department of Chemistry, Harbin Normal University, Harbin, 150500, China

    H. Q. Jiang

Authors
  1. H. Q. Jiang
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  2. P. Wang
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  3. X. L. Guo
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  4. H. Z. Xian
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 1680–1685, October, 2006.

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Jiang, H.Q., Wang, P., Guo, X.L. et al. Preparation and characterization of low-amount Yb3+-doped TiO2 photocatalyst. Russ Chem Bull 55, 1743–1747 (2006). https://doi.org/10.1007/s11172-006-0482-x

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  • DOI: https://doi.org/10.1007/s11172-006-0482-x

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