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<p>Ion doping represents an effective strategy to enhance the photocatalytic performance of bismuth oxychloride (BiOCl) by tailoring its electronic structure. In this study, Cu-doped BiOCl (Cu-BiOCl) powders were synthesized via a facile molten salt method. The as-prepared Cu-BiOCl samples exhibited remarkably enhanced photocatalytic activity toward Rhodamine B (RhB) degradation under visible light compared to pristine BiOCl. Among them, 10%Cu-BiOCl demonstrated the optimal performance, achieving 95.5% RhB removal within 50&#xa0;min. The incorporation of Cu not only broadened the intrinsic optical absorption but also induced strong tail absorption in the 600–800&#xa0;nm range. Density functional theory (DFT) calculations confirmed that Cu doping introduces impurity levels, narrowing the band gap and promoting charge separation. This work provides valuable insights for the rational design of efficient BiOCl-based photocatalysts for water purification.</p>

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One-pot construction of Cu-doped BiOCl using molten salt for efficient photocatalytic degradation of Rhodamine B

  • 期刊论文

  • 发表日期：

    2026年2月28日

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  • Chenyu Zhang,
  • Ruohan Shen,
  • Shumin Zhang,
  • Kaiqiang Xu,
  • Jia Yu,
  • Sheng Han

摘要

Ion doping represents an effective strategy to enhance the photocatalytic performance of bismuth oxychloride (BiOCl) by tailoring its electronic structure. In this study, Cu-doped BiOCl (Cu-BiOCl) powders were synthesized via a facile molten salt method. The as-prepared Cu-BiOCl samples exhibited remarkably enhanced photocatalytic activity toward Rhodamine B (RhB) degradation under visible light compared to pristine BiOCl. Among them, 10%Cu-BiOCl demonstrated the optimal performance, achieving 95.5% RhB removal within 50 min. The incorporation of Cu not only broadened the intrinsic optical absorption but also induced strong tail absorption in the 600–800 nm range. Density functional theory (DFT) calculations confirmed that Cu doping introduces impurity levels, narrowing the band gap and promoting charge separation. This work provides valuable insights for the rational design of efficient BiOCl-based photocatalysts for water purification.