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Preparation and photocatalytic activity of BiOBr/TiO2 heterojunction nanocomposites

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Abstract

An efficient visible-light-responsive BiOBr/TiO2 heterojunction nanocomposite was fabricated successfully using in-situ depositing technique at room temperature by introducing BiOBr onto the surface of TiO2 nanobelts pre-prepared by hydrothermal reaction and etched with H2SO4. The obtained particles were characterized by XRD, SEM, TEM, XPS, UV-Vis DRS and PL techniques. BiOBr/TiO2 heterojunction nanocomposites with different mass ratios of m(BiOBr)/m(TiO2) were discussed in order to get the best photocatalytic activity, and BiOBr/TiO2-1.0 was proved to be the optimal mass ratio. BiOBr/TiO2-1.0 exhibited excellent photocatalytic activity in the degradation of RhB compared with TiO2 nanobelts, pure BiOBr and the mechanical mixture of TiO2 nanobelts and BiOBr. At last, a possible mechanism of photocatalytic enhancement was proposed.

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Authors and Affiliations

  1. School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China

    Xin Tan  (谭 欣) & Xiangli Li  (李香利)

  2. School of Science, Tibet University, Lhasa, 850000, China

    Xin Tan  (谭 欣)

  3. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Tao Yu  (于 涛) & Yang Zhao  (赵 阳)

Authors
  1. Xin Tan  (谭 欣)
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  2. Xiangli Li  (李香利)
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  3. Tao Yu  (于 涛)
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  4. Yang Zhao  (赵 阳)
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Corresponding author

Correspondence to Tao Yu  (于 涛).

Additional information

Supported by the National Basic Research Program of China (“973” Program, No. 2014CB239300, No. 2012CB720100), National Natural Science Foundation of China (No. 21406164, No. 21466035) and Specialized Research Fund for the Doctoral Program of Higher Education of China (No. 20110032110037, No. 20130032120019).

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Tan, X., Li, X., Yu, T. et al. Preparation and photocatalytic activity of BiOBr/TiO2 heterojunction nanocomposites. Trans. Tianjin Univ. 22, 211–217 (2016). https://doi.org/10.1007/s12209-016-2778-8

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  • DOI: https://doi.org/10.1007/s12209-016-2778-8

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