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<p>We have developed a novel S-scheme mechanism to expand the photoresponse range of Bi<sub>2</sub>SiO<sub>5</sub>. This study reports the successful creation of a CN/BS heterojunction photocatalyst, which is composed of g-C<sub>3</sub>N<sub>5</sub> and Bi<sub>2</sub>SiO<sub>5</sub>. The synthesis was achieved through a simple two-step procedure, involving hydrothermal treatment and subsequent calcination. The 10% CN/BS exhibits superior photocatalytic efficiency. When exposed to visible light, the CN/BS heterojunction photocatalyst achieves a removal rate of 98.8% regarding the breakdown of Rhodamine B (RhB), outperforming Bi<sub>2</sub>SiO<sub>5</sub> by a factor of 5 and g-C<sub>3</sub>N<sub>5</sub> by a factor of 3. Furthermore, the removal rate for Ciprofloxacin (CIP) reaches 96.0%, which is double that of Bi<sub>2</sub>SiO<sub>5</sub> and 14 times higher than that of g-C<sub>3</sub>N<sub>5</sub>. It is evident that the photodegradation efficiency of 10% CN/BS towards organic pollutants significantly surpasses that of the precursor composite materials. The improved photocatalytic performance is likely due to the larger specific surface area, more efficient light harvesting, and the construction of an heterojunction. Crucially, the proposition of an S-scheme hypothesis for charge transport within the CN/BS heterojunction photocatalyst marks a pivotal advancement. This concept is of substantial importance for both the theoretical exploration and the practical deployment of photocatalytic materials.</p>

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A high-performance g-C3N5/Bi2SiO5 heterojunction photocatalyst induced by constructing S-scheme electron-highways

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月4日

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  • Shaowei Qin,
  • Lili Huang,
  • Yuan Zhang,
  • Tao Zhang,
  • Mingxia Tian,
  • Jianhui Jiang

摘要

We have developed a novel S-scheme mechanism to expand the photoresponse range of Bi2SiO5. This study reports the successful creation of a CN/BS heterojunction photocatalyst, which is composed of g-C3N5 and Bi2SiO5. The synthesis was achieved through a simple two-step procedure, involving hydrothermal treatment and subsequent calcination. The 10% CN/BS exhibits superior photocatalytic efficiency. When exposed to visible light, the CN/BS heterojunction photocatalyst achieves a removal rate of 98.8% regarding the breakdown of Rhodamine B (RhB), outperforming Bi2SiO5 by a factor of 5 and g-C3N5 by a factor of 3. Furthermore, the removal rate for Ciprofloxacin (CIP) reaches 96.0%, which is double that of Bi2SiO5 and 14 times higher than that of g-C3N5. It is evident that the photodegradation efficiency of 10% CN/BS towards organic pollutants significantly surpasses that of the precursor composite materials. The improved photocatalytic performance is likely due to the larger specific surface area, more efficient light harvesting, and the construction of an heterojunction. Crucially, the proposition of an S-scheme hypothesis for charge transport within the CN/BS heterojunction photocatalyst marks a pivotal advancement. This concept is of substantial importance for both the theoretical exploration and the practical deployment of photocatalytic materials.