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<p>This work discusses the fabrication of a robust stable organic MIL-88&#xa0;A(Fe) framework (MAF) assembled with visible-light-induced BiVO<sub>4</sub> and carbon nanomaterials to establish integrated piezophotocatalytic system. The ternary BiVO<sub>4</sub>/MIL-88&#xa0;A(Fe)-C (Bi/MAF-C) catalyst was precisely characterized by various sophisticated technologies. The Bi/MAF-C composite revealed a powerful piezophotocatalytic activity (95.7%) towards tetracycline (TC) antibiotic in a short reaction time (40&#xa0;min). Our composite exhibited the highest TC degradation rate (0.06460&#xa0;min<sup>−1</sup>), far exceeding the binary Bi/MAF, BiVO<sub>4</sub>, and MIL-88&#xa0;A(Fe) by 1.45, 2.78, and 3.8, respectively. The improved performance was associated with the multifunctional mechanisms of Bi/MAF-C in one integrated system. MIL-88&#xa0;A(Fe) showed excellent response to piezoelectric effects, generating an internal electric field that further extended the photocarrier lifetime. Besides, BiVO<sub>4</sub> contributes to consuming wider visible light wavelengths due to its moderate band gap energy, synergy improving the piezophotocatalytic reaction. The MIL-88&#xa0;A(Fe) component implies a robust photo-Fenton effect by activating H<sub>2</sub>O<sub>2</sub> to generate <sup>•</sup>OH radicals, enhancing the oxidative degradation of pollutants under light irradiation. Additionally, further improvement in catalytic mechanism was obtained by carbon nanosheets, which act as an efficient electron conductor, accelerating the transfer of photocarriers in the Z-scheme heterojunction. The radical experiments confirmed the predominant role of <sup>•</sup>OH and <sup>•</sup>O<sub>2</sub><sup>−</sup> in TC decomposition, further supporting the Z-scheme conception. In conclusion, this integrated piezophotocatalytic system reflects a promising strategy towards designing highly efficient multifunctional catalysts to control environmental pollution with enhanced efficiency.</p> Graphical Abstract <p></p>

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Engineering of BiVO4/MIL-88 A(Fe)-C Composite for Synergistic Degradation of Tetracycline Over Piezophotocatalytic and Photo-Fenton Reactions

  • 期刊论文

  • 发表日期：

    2025年9月9日

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  • Zaid H. Jabbar,
  • Bassim H. Graimed,
  • Raad Farhan Shahad,
  • Huda S. Merdas,
  • Saad H. Ammar,
  • Ali Majdi

摘要

This work discusses the fabrication of a robust stable organic MIL-88 A(Fe) framework (MAF) assembled with visible-light-induced BiVO4 and carbon nanomaterials to establish integrated piezophotocatalytic system. The ternary BiVO4/MIL-88 A(Fe)-C (Bi/MAF-C) catalyst was precisely characterized by various sophisticated technologies. The Bi/MAF-C composite revealed a powerful piezophotocatalytic activity (95.7%) towards tetracycline (TC) antibiotic in a short reaction time (40 min). Our composite exhibited the highest TC degradation rate (0.06460 min−1), far exceeding the binary Bi/MAF, BiVO4, and MIL-88 A(Fe) by 1.45, 2.78, and 3.8, respectively. The improved performance was associated with the multifunctional mechanisms of Bi/MAF-C in one integrated system. MIL-88 A(Fe) showed excellent response to piezoelectric effects, generating an internal electric field that further extended the photocarrier lifetime. Besides, BiVO4 contributes to consuming wider visible light wavelengths due to its moderate band gap energy, synergy improving the piezophotocatalytic reaction. The MIL-88 A(Fe) component implies a robust photo-Fenton effect by activating H2O2 to generate •OH radicals, enhancing the oxidative degradation of pollutants under light irradiation. Additionally, further improvement in catalytic mechanism was obtained by carbon nanosheets, which act as an efficient electron conductor, accelerating the transfer of photocarriers in the Z-scheme heterojunction. The radical experiments confirmed the predominant role of •OH and •O2− in TC decomposition, further supporting the Z-scheme conception. In conclusion, this integrated piezophotocatalytic system reflects a promising strategy towards designing highly efficient multifunctional catalysts to control environmental pollution with enhanced efficiency.

Graphical Abstract