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Reaction Kinetics, Mechanisms and Catalysis

, Volume 110, Issue 2, pp 529–541 | Cite as

Improved photocatalytic activity of Bi2O3 composites derived from a layered precursor

  • Jian Song
  • Weijie Yang
  • Feipeng Jiao
  • Jingang Yu
Article

Abstract

ZnO/Al2O3/Bi2O3 mixed-metal oxide (ZnAlBi-MMO) has been successfully prepared by the coprecipitation method and controllable calcination. Powder X-ray diffraction, high-resolution transmission electron microscopy and UV–Vis diffuse reflectance spectra confirmed the structure of as-synthesized solids. The results reveal that the synthetic methods can provide the heterostructure of MMO. The photocatalytic activity of ZnAlBi-MMO was evaluated by the photodegradation of methylene blue (MB) under visible light irradiation. Factors that may affect the photodegradation behavior were studied such as calcination temperature, catalyst dose and pH. Furthermore, the stability of synthesized photocatalysts was investigated by studying the photocatalytic ability of reclaimed ZnAlBi-MMO. The results showed the removal efficiency of MB was higher than 83 % even after four successive photoreactions, demonstrating the great potential of layered double hydroxides as catalyst supports. The possible mechanism underlying the enhanced photocatalytic activity of Bi2O3 was also discussed.

Keywords

Bi2O3 Photocatalysts Visible light Dye degradation Layered double hydroxides 

Notes

Acknowledgments

The authors would like to thank National Natural Science Foundation of China (No. 21176263) for the financial supports of this work.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • Jian Song
    • 1
  • Weijie Yang
    • 1
  • Feipeng Jiao
    • 1
  • Jingang Yu
    • 1
  1. 1.College of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina

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