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<p>This study reported on a dual-functional Cu-doped BiVO<sub>4</sub> photocatalyst synthesized via the hydrothermal method. Optimized 1&#xa0;wt% Cu doping narrowed the bandgap to 2.24&#xa0;eV, enabling 85% &#xa0;methylene blue (MB) degradation under low-intensity UV (13&#xa0;W) within 180&#xa0;min; a 5.1-fold enhancement over bare BiVO<sub>4</sub>. Radical trapping confirmed hydroxyl radicals (·OH) and superoxide radicals (·O<sub>2</sub><sup>−</sup>) as the dominant reactive species. The catalyst retained &gt; 92% efficiency over three cycles and exhibited moderate antibacterial activity against <i>Staphylococcus aureus</i> (12.6 ± 0.4&#xa0;mm inhibition zone) in dark conditions, attributed to Cu<sup>2</sup>⁺ release. Cost analysis further revealed a competitive synthesis cost of approximately RM 7.57 per gram, supporting the economic viability for large-scale environmental remediation applications. The integration of dual photocatalytic and antibacterial functionalities, along with cost efficiency, reinforces the practical potential of Cu-doped BiVO<sub>4</sub> in wastewater treatment applications.</p>

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Low intensity UV driven dual functional Cu doped BiVO4 for enhanced methylene blue degradation and Staphylococcus aureus inactivation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月3日

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  • Thien Kuang Lih,
  • Alvin Lim Teik Zheng,
  • Hui Yan Tan,
  • Shahrul Razid Sarbini,
  • Kelly Wong Kai Seng,
  • Eric Lim Teik Chung,
  • Yoshito Andou,
  • Kar Ban Tan

摘要

This study reported on a dual-functional Cu-doped BiVO4 photocatalyst synthesized via the hydrothermal method. Optimized 1 wt% Cu doping narrowed the bandgap to 2.24 eV, enabling 85%  methylene blue (MB) degradation under low-intensity UV (13 W) within 180 min; a 5.1-fold enhancement over bare BiVO4. Radical trapping confirmed hydroxyl radicals (·OH) and superoxide radicals (·O2−) as the dominant reactive species. The catalyst retained > 92% efficiency over three cycles and exhibited moderate antibacterial activity against Staphylococcus aureus (12.6 ± 0.4 mm inhibition zone) in dark conditions, attributed to Cu2⁺ release. Cost analysis further revealed a competitive synthesis cost of approximately RM 7.57 per gram, supporting the economic viability for large-scale environmental remediation applications. The integration of dual photocatalytic and antibacterial functionalities, along with cost efficiency, reinforces the practical potential of Cu-doped BiVO4 in wastewater treatment applications.