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Preparation and characterization of (Ba0.85Ca0.15)(Zr0.1Ti0.9)TiO3(BCZT)/Bi2O3 composites as efficient visible-light-responsive photocatalysts

  • S. Abhinay
  • P. Tarai
  • R. MazumderEmail author
Ceramics
  • 6 Downloads

Abstract

The heterojunction composites (Ba0.85Ca0.15)(Zr0.1Ti0.9)TiO3(BCZT)/Bi2O3 with different weight ratios (75:25, 50:50 and 25:75) were successfully synthesized by solid-state route. As-synthesized composite powders were characterized by XRD, FESEM, EDX, UV–visible and photoluminescence spectroscopy. Photocatalytic activity evaluation was carried out by the degradation of rhodamine B (RhB) under UV and visible light exposure. The results show that the heterojunction composites BCZT/Bi2O3 display better photocatalytic activity than pure BCZT or Bi2O3. Among all the heterojunction composites, BCZT/Bi2O3 (50:50) composite exhibits a lower recombination rate of electron–hole pair and shows the highest photocatalytic activity. The rate constant of BCZT/Bi2O3 (50:50) composite for RhB degradation is 15.4 and 2.1 times higher than those of pure BCZT and Bi2O3 under visible light irradiation, respectively. Finally, a possible mechanism for enhanced charge separation and photodegradation is proposed.

Notes

Acknowledgements

We are thankful to the Director, NIT Rourkela, Odisha, India, for providing experimental facilities.

Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest.

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Ceramic EngineeringNational Institute of TechnologyRourkelaIndia

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