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Research Article | Open Access

Piezoelectric potential activated interfacial electric field in BiFeO3@BaTiO3 heterojunction for rapid and round-the-clock photocatalytic degradation of organic pollutants

Mingtong Li1Jianhua Zhou1( )Rui Di1Zhixiang Zhang1Xiaojiang Mu2Xiaoyang Wang2Yufei Gu3Lifen Su4Jing Liu1Chengyan Liu1Changlai Yuan1Lei Miao2( )
Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Novel Battery Materials Research Center of Engineering Technology, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, China
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
Anhui Province Key Laboratory of Environment-friendly Polymer Materials, School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China
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Abstract

The highly efficient degradation and purification of organic pollutants in wastewater by photocatalysis is still challenging. In this study, a piezoelectric potential-activated interfacial electric field (IEF) was constructed to endow BiFeO3@BaTiO3 (BFO@BTO) heterojunction with the ability to serve as a round-the-clock photocatalyst for polluted water remediation. BFO@BTO heterojunction is composed of BiFeO3 nanoparticles decorated on the surface of BaTiO3 nanorods, which shortens the carrier migration path. More importantly, the IEF can be activated and reconstructed under ultrasonic wave irradiation, leading to a lower potential barrier and enhanced separation efficiency for photogenerated carriers. The degradation rate constant k value of BFO@BTO heterojunction reached 0.038 min−1, which was 1.9 and 7.0 times greater than that of piezocatalysis and photocatalysis alone, respectively. It also exhibited excellent stability in three light‒dark cycles for high concentrations (25 mg·L−1) of rhodamine B (RhB) and tetracycline hydrochloride (TC). This study provides a promising strategy for designing highly active photoassisted piezocatalysts for environmental energy utilization and round-the-clock catalysis.

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Journal of Advanced Ceramics
Pages 2030-2042
Cite this article:
Li M, Zhou J, Di R, et al. Piezoelectric potential activated interfacial electric field in BiFeO3@BaTiO3 heterojunction for rapid and round-the-clock photocatalytic degradation of organic pollutants. Journal of Advanced Ceramics, 2024, 13(12): 2030-2042. https://doi.org/10.26599/JAC.2024.9220996

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Received: 10 August 2024
Revised: 09 October 2024
Accepted: 04 November 2024
Published: 28 December 2024
© The Author(s) 2024.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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