Significant enhancement of piezoelectric photocatalytic activity in rare earth ions doped BiFeO3

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-05-30 DOI:10.1016/j.apsusc.2025.163679

Qingqing Zhu , Xiaojuan Zhang , Li Li , Chao Cheng , Jun Zheng , Youmin Guo , Chunchang Wang

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Abstract

This study focuses on enhancing the piezoelectric photocatalytic activity of BiFeO₃ through rare earth ion doping. By doping rare earth ions (La, Sm, Ce), the crystal structure, optical properties, and piezoelectric properties of BiFeO₃ are modified. The results show that the doping alters the rhombic structure, reduces the band gap, and enhances light absorption. A synergistic system combining ultraviolet − visible spectral irradiation and a high − frequency ultrasonic field was used. By monitoring the decomposition kinetics of Rhodamine B (RhB) and the generation pathways of free radicals, the multi-field coupling catalytic efficiency of piezoelectric semiconductor materials was systematically quantified. The doping significantly improves the degradation rate, with Bi_0.8Sm_0.2FeO₃ showing the best performance. The roles of different radicals in the degradation process are investigated, and the catalyst shows good stability and sustainability after multiple cycles.

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稀土离子掺杂BiFeO3对压电光催化活性的显著增强

本研究的重点是通过稀土离子掺杂增强BiFeO3的压电光催化活性。通过掺杂稀土离子（La、Sm、Ce），改性了BiFeO3的晶体结构、光学性能和压电性能。结果表明，掺杂改变了材料的菱形结构，减小了带隙，增强了材料的光吸收。采用紫外-可见光谱辐照与高频超声场相结合的协同系统。通过监测罗丹明B （Rhodamine B, RhB）的分解动力学和自由基的生成途径，系统地量化了压电半导体材料的多场耦合催化效率。掺杂显著提高了降解率，其中Bi0.8Sm0.2FeO3表现出最好的性能。研究了不同自由基在降解过程中的作用，催化剂在多次循环后表现出良好的稳定性和可持续性。

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.