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Journal of Materials Science

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07-11-2019 | Ceramics

Preparation and characterization of (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)TiO₃(BCZT)/Bi₂O₃ composites as efficient visible-light-responsive photocatalysts

Authors: S. Abhinay, P. Tarai, R. Mazumder

Published in: Journal of Materials Science | Issue 5/2020

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Abstract

The heterojunction composites (Ba_0.85Ca_0.15)(Zr_0.1Ti_0.9)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.

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Title: Preparation and characterization of (Ba0.85Ca0.15)(Zr0.1Ti0.9)TiO3(BCZT)/Bi2O3 composites as efficient visible-light-responsive photocatalysts
Authors: S. Abhinay
P. Tarai
R. Mazumder
Publication date: 07-11-2019
Publisher: Springer US
Published in: Journal of Materials Science / Issue 5/2020
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-019-04175-3

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