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<p>To address critical limitations of conventional photocatalysts—rapid photogenerated carrier recombination and cumbersome recovery—a novel nano-BiVO<sub>4</sub>@PET fibrous catalyst with high loading and robust interfacial bonding was fabricated. An amorphous BiVO<sub>4</sub> mediating layer was first constructed on PET fibers via a deep ultraviolet (DUV)-assisted sol–gel method, followed by in situ growth of monoclinic BiVO<sub>4</sub> nanocrystals through liquid-phase precipitation. The catalytic performance toward methylene blue (MB) and rhodamine B (RhB) was systematically evaluated under ultrasonic vibration, light irradiation, and piezoelectric-photocatalytic synergy. Results showed that under synergistic conditions, MB degradation efficiency reached 90.1% within 125&#xa0;min and RhB degradation efficiency hit 92.7% within 100&#xa0;min. The apparent rate constants (<i>k</i>) were 1.5 times higher than those under sole light irradiation, 5.6 times (for MB) and 7 times (for RhB) higher than those under sole ultrasonic vibration. Radical trapping experiments and electron spin resonance (ESR) characterization confirmed •OH and h⁺ as the dominant active species. Piezopotential enhanced catalytic performance via strengthening carrier separation, reactant activation, and mass transfer efficiency. After 5 cyclic runs, the catalyst retained ≥ 98.7% of its initial activity with mass loss &lt; 1% and could be directly retrieved, offering a high-efficiency, stable fiber-based piezoelectric-photocatalytic material for organic wastewater treatment.</p> Graphical Abstract <p></p>

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Deep ultraviolet-assisted sol–gel strategy for fabricating recyclable BiVO4@PET piezo-photocatalysts with enhanced activity

  • 期刊论文

  • 发表日期：

    2026年7月2日

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  • Shuoqing Cui,
  • Zongfan Duan,
  • Furong Wang,
  • Ruihao Wang,
  • Yu Liu,
  • Gege Lei,
  • Jiayu She,
  • Yayu Tian,
  • Nuo Xu,
  • Dongjie Liu

摘要

To address critical limitations of conventional photocatalysts—rapid photogenerated carrier recombination and cumbersome recovery—a novel nano-BiVO4@PET fibrous catalyst with high loading and robust interfacial bonding was fabricated. An amorphous BiVO4 mediating layer was first constructed on PET fibers via a deep ultraviolet (DUV)-assisted sol–gel method, followed by in situ growth of monoclinic BiVO4 nanocrystals through liquid-phase precipitation. The catalytic performance toward methylene blue (MB) and rhodamine B (RhB) was systematically evaluated under ultrasonic vibration, light irradiation, and piezoelectric-photocatalytic synergy. Results showed that under synergistic conditions, MB degradation efficiency reached 90.1% within 125 min and RhB degradation efficiency hit 92.7% within 100 min. The apparent rate constants (k) were 1.5 times higher than those under sole light irradiation, 5.6 times (for MB) and 7 times (for RhB) higher than those under sole ultrasonic vibration. Radical trapping experiments and electron spin resonance (ESR) characterization confirmed •OH and h⁺ as the dominant active species. Piezopotential enhanced catalytic performance via strengthening carrier separation, reactant activation, and mass transfer efficiency. After 5 cyclic runs, the catalyst retained ≥ 98.7% of its initial activity with mass loss < 1% and could be directly retrieved, offering a high-efficiency, stable fiber-based piezoelectric-photocatalytic material for organic wastewater treatment.

Graphical Abstract