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Constructing novel Bi2SiO5–Bi2O3 hybrid loaded sepiolite with enhanced visible light photocatalytic activity

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Abstract

Bi2O3 and Bi2SiO5–Bi2O3 hybrid loaded sepiolite photocatalysts were synthesized via chemical precipitation method by tuning ratio of Bi3+ and sepiolite. The samples were characterized and photodegradation of malachite green (MG) under simulated visible light irradiation was employed to investigate their photocatalytic activities. The results showed that Bi2SiO5–Bi2O3 hybrid loaded sepiolite had small and relatively uniform particles, large specific surface area. Moreover, after combining with Bi2SiO5, the hybrid showed more effective charge carrier separation, leading to higher degradation efficiency for MG with high concentration (50 mg/L) contrast to Bi2O3 loaded sepiolite. Last, the photocatalytic mechanism over the hybrid was put forward based on active species trapping study.

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Acknowledgements

The authors gratefully acknowledge the financial support from the Youth Innovation Foundation of Tianjin University of Science & Technology (No. 2015LG11), the Innovation Team Program of Tianjin University of Science & Technology (No. 10117), and the National Nature Science Foundation of China (No. 51404170).

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Authors and Affiliations

  1. Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment, College of Mechanical Engineering, Tianjin University of Science and Technology, Tianjin, 300222, People’s Republic of China

    Lijun Cheng, Xumin Hu & Liang Hao

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  1. Lijun Cheng
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  2. Xumin Hu
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  3. Liang Hao
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Correspondence to Lijun Cheng.

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Cheng, L., Hu, X. & Hao, L. Constructing novel Bi2SiO5–Bi2O3 hybrid loaded sepiolite with enhanced visible light photocatalytic activity. J Mater Sci: Mater Electron 29, 6316–6322 (2018). https://doi.org/10.1007/s10854-018-8611-5

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  • DOI: https://doi.org/10.1007/s10854-018-8611-5

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