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A facile Pechini method to synthesize novel Bi12SiO20–Bi2SiO5 heterostructure photocatalysts with enhanced visible light photocatalytic activity

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Abstract

Novel Bi12SiO20–Bi2SiO5 heterostructure photocatalysts were prepared by controlling the molar ratio of Bi/Si in the reactants via Pechini method. With the increasement of the molar ratio of Bi/Si, the samples tend to be well-crystallized Bi12SiO20 and the content of Bi2SiO5 decreases in composites. Experiments reveal that the heterojunction shows higher visible light photocatalytic activity than pure Bi12SiO20 and Bi2SiO5 due to an increase in light harvesting efficiency and an efficient electron–hole separation. And the heterostructure photocatalyst is stable in the photocatalytic reaction process. The influence of some trapping agents on the photodegradation of Rhodamine B was investigated, and h+ and ·O2 − were verified to play more important roles than ·OH−.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 51302161) and the Education Foundation of Shaanxi University of Science and Technology (Grant No. BJ13-03).

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Authors and Affiliations

  1. School of Materials Science & Engineering, Shaanxi University of Science & Technology, Xi’an, 710021, China

    Yuanting Wu, Menglong Li, Jun Yuan, Jian Lu, Penghong Wu, Changqing Liu & Xiufeng Wang

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  1. Yuanting Wu
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  2. Menglong Li
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  3. Jun Yuan
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  4. Jian Lu
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  5. Penghong Wu
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  6. Changqing Liu
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  7. Xiufeng Wang
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Correspondence to Yuanting Wu.

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Wu, Y., Li, M., Yuan, J. et al. A facile Pechini method to synthesize novel Bi12SiO20–Bi2SiO5 heterostructure photocatalysts with enhanced visible light photocatalytic activity. J Mater Sci: Mater Electron 29, 4503–4508 (2018). https://doi.org/10.1007/s10854-017-8398-9

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  • DOI: https://doi.org/10.1007/s10854-017-8398-9

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