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<p>Bi<sub>5</sub>O<sub>7</sub>I was considered as a promising photocatalyst due to its unique structure. However, the recombination rate of electron–hole pairs generated by Bi<sub>5</sub>O<sub>7</sub>I is too fast, making it impossible for practical applications. In this study, Bi<sub>5</sub>O<sub>7</sub>I catalysts deposited with various amount of silver were manufactured and their photocatalytic efficiency for rhodamine B (RhB) was measured. It was found that Bi<sub>5</sub>O<sub>7</sub>I with a silver deposition of 15% (named as Bi<sub>5</sub>O<sub>7</sub>I/Ag-15) exhibits the highest catalytic performance, with a degradation rate of 97.34% for RhB after illumination for 90&#xa0;min. The cyclic test results confirmed that Bi<sub>5</sub>O<sub>7</sub>I/Ag-15 still maintained high photocatalytic activity after six cycles of degradation. In addition, Bi<sub>5</sub>O<sub>7</sub>I/Ag-15 also exhibits an excellent photocatalytic performance in acidic or alkaline environments, indicating its potential for practical applications. A reasonable degradation mechanism for RhB photocatalysis was then proposed.</p> Graphical abstract <p></p>

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Enhanced photocatalytic degradation of rhodamine B pollutants by Ag-deposited Bi5O7I

  • 期刊论文

  • 发表日期：

    2025年6月2日

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  • Yong He,
  • Wensong Lin,
  • Ran Gao,
  • Yeheng Zhang,
  • Huanxia Lin

摘要

Bi5O7I was considered as a promising photocatalyst due to its unique structure. However, the recombination rate of electron–hole pairs generated by Bi5O7I is too fast, making it impossible for practical applications. In this study, Bi5O7I catalysts deposited with various amount of silver were manufactured and their photocatalytic efficiency for rhodamine B (RhB) was measured. It was found that Bi5O7I with a silver deposition of 15% (named as Bi5O7I/Ag-15) exhibits the highest catalytic performance, with a degradation rate of 97.34% for RhB after illumination for 90 min. The cyclic test results confirmed that Bi5O7I/Ag-15 still maintained high photocatalytic activity after six cycles of degradation. In addition, Bi5O7I/Ag-15 also exhibits an excellent photocatalytic performance in acidic or alkaline environments, indicating its potential for practical applications. A reasonable degradation mechanism for RhB photocatalysis was then proposed.

Graphical abstract