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Self-Assembled 3D Flowerlike Hierarchical Fe3O4@Bi2O3 Core–Shell Architectures and Their Enhanced Photocatalytic Activity under Visible Light

Authors

  • Yang Wang,

    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Shikuo Li,

    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Prof. Xianran Xing,

    1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083 (P.R. China)
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  • Fangzhi Huang,

    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Prof. Yuhua Shen,

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
    • School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Anjian Xie,

    Corresponding author
    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
    • School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Xiufang Wang,

    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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  • Jian Zhang

    1. School of Chemistry and Chemical Engineering, Anhui Univerity, Hefei 230039 (P.R. China), Fax: (+86) 551-5108702
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Abstract

Three-dimensional (3D) flowerlike hierarchical Fe3O4@Bi2O3 core–shell architectures were synthesized by a simple and direct solvothermal route without any linker shell. The results indicated that the size of the 3D flowerlike hierarchical microspheres was about 420 nm and the shell was composed of several nanosheets with a thickness of 4–10 nm and a width of 100–140 nm. The saturation magnetization of the superparamagnetic composite microspheres was about 41 emu g−1 at room temperature. Moreover, the Fe3O4@Bi2O3 composite microspheres showed much higher (7–10 times) photocatalytic activity than commercial Bi2O3 particles under visible-light irradiation. The possible formation mechanism was proposed for Ostwald ripening and the self-assembled process. This novel composite material may have potential applications in water treatment, degradation of dye pollutants, and environmental cleaning, for example.

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