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Sol-gel synthesis and characterization of the photocatalyst BaCo1/3Nb2/3O3

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Abstract

The photocatalyst BaCo1/3Nb2/3O3 has been synthesized at 750°C by using a sol-gel process, and the surface area is 19.70 m2/g. While the surface area of the powder synthesized by using a solid state reaction process is 2.2 m2/g. It was characterized by X-ray diffraction, scanning electron microscopy(SEM), UV-vis diffuse reflectance spectroscopy, Raman scattering spectroscopy and the measurement of the photocatalytic activity in evolving H2 from CH3OH/H2O solution with the Pt co-catalyst under visible light irradiation. From the SEM image, BaCo1/3Nb2/3O3 powder calcined at 750°C is dispersive, and the average particle size is about 30 nm. Raman scattering spectrum at room temperature shows that, due to the different ionic radius of the Co2+ and Nb5+ ions, BaCo1/3Nb2/3O3 may has a distorted perovskite structure. Under visible light irradiation (λ > 420 nm), the formation rate of H2 evolution from CH3OH/H2O solution with the 0.5 wt% Pt co-catalyst is about 18.1 μmol/h·gcat. for the photocatalyst BaCo1/3Nb2/3O3, much higher than that of BaCo1/3Nb2/3O3 powder synthesized by the solid state reaction process.

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Authors and Affiliations

  1. Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency (JST), Japan

    Jiang Yin & Jinhua Ye

  2. Ecomaterials Center, National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan

    Jiang Yin & Jinhua Ye

  3. Ecomaterials and Renewable Energy Research Center, Nanjing University, Nanjing, 210093, China

    Zhigang Zou

Authors
  1. Jiang Yin
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  2. Zhigang Zou
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  3. Jinhua Ye
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Yin, J., Zou, Z. & Ye, J. Sol-gel synthesis and characterization of the photocatalyst BaCo1/3Nb2/3O3 . J Mater Sci 41, 1131–1135 (2006). https://doi.org/10.1007/s10853-005-3651-7

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  • DOI: https://doi.org/10.1007/s10853-005-3651-7

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