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<p>Piezo-photocatalysis represents an eco-friendly strategy for degrading pollutants by harnessing natural, clean energy sources. However, its practical application is limited by insufficient catalytic activity. In this work, we propose lanthanum (La)-doped bismuth ferrite (LBF) as a means to enhance piezo-photocatalytic degradation of tetracycline hydrochloride (TC) in wastewater through band structure engineering. La doping reduced particle size from approximately 48.7 to 31.1&#xa0;nm, significantly enhanced optical absorption, and narrowed the bandgap from 2.10 to 1.88&#xa0;eV. The optimized LBF0.2 sample demonstrated superior piezo-photocatalytic performance, achieving a degradation rate of 0.069&#xa0;min⁻<sup>1</sup> for TC, which is 8.6 and 3.2 times higher than those of pure piezo-catalysis and photocatalysis, respectively. This synergy is ascribed to the internal piezoelectric field of LBF0.2, which modifies the energy band structure, promotes photogenerated charge separation, and facilitates the production of reactive species for pollutant decomposition. Remarkably, the material retained ~ 96% efficiency after six consecutive cycles. Our findings propose a novel strategy for leveraging mechanical energy to amplify photocatalytic performance, highlighting its potential for sustainable wastewater treatment.</p>

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Enhanced piezo-photocatalytic degradation of pharmaceutical antibiotics through band engineering

  • 期刊论文

  • 发表日期：

    2025年9月4日

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  • Zhanpeng Zuo,
  • Wenrui Zhao,
  • Chenlong Shi,
  • Yue Wang,
  • Dongyun Li,
  • Qiong Wu,
  • Hongliang Ge,
  • Pingzhan Si,
  • Yanting Yang

摘要

Piezo-photocatalysis represents an eco-friendly strategy for degrading pollutants by harnessing natural, clean energy sources. However, its practical application is limited by insufficient catalytic activity. In this work, we propose lanthanum (La)-doped bismuth ferrite (LBF) as a means to enhance piezo-photocatalytic degradation of tetracycline hydrochloride (TC) in wastewater through band structure engineering. La doping reduced particle size from approximately 48.7 to 31.1 nm, significantly enhanced optical absorption, and narrowed the bandgap from 2.10 to 1.88 eV. The optimized LBF0.2 sample demonstrated superior piezo-photocatalytic performance, achieving a degradation rate of 0.069 min⁻1 for TC, which is 8.6 and 3.2 times higher than those of pure piezo-catalysis and photocatalysis, respectively. This synergy is ascribed to the internal piezoelectric field of LBF0.2, which modifies the energy band structure, promotes photogenerated charge separation, and facilitates the production of reactive species for pollutant decomposition. Remarkably, the material retained ~ 96% efficiency after six consecutive cycles. Our findings propose a novel strategy for leveraging mechanical energy to amplify photocatalytic performance, highlighting its potential for sustainable wastewater treatment.