Scholarlink

<p>Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) is a material with a graphite-like layered structure. Due to its non-toxic and harmless nature, stable performance, and visible light response capability, g-C<sub>3</sub>N<sub>4</sub> holds significant application prospects in the field of photocatalysis. In this study, the Sb<sub>2</sub>(S,Se)<sub>3</sub> was coupled with g-C<sub>3</sub>N<sub>4</sub> to construct a heterojunction structure, and the photocatalytic degradation performance of the g-C<sub>3</sub>N<sub>4</sub>/Sb<sub>2</sub>(S,Se)<sub>3</sub> heterojunction materials on organic dye pollutants was investigated. Firstly, the g-C<sub>3</sub>N<sub>4</sub>/Sb<sub>2</sub>S<sub>3</sub> composite samples were prepared using a hydrothermal reaction. Subsequently, the g-C<sub>3</sub>N<sub>4</sub>/Sb<sub>2</sub>(S,Se)<sub>3</sub> heterojunction structures were constructed through selenization, and then they were used in the efficient photocatalytic degradation process of organic pollutants methylene blue (MB) and rhodamine B (RhB). The results indicate that due to the formation of the heterojunction structure, the light absorption performance of the g-C<sub>3</sub>N<sub>4</sub>/Sb<sub>2</sub>S<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>/Sb<sub>2</sub>(S,Se)<sub>3</sub> composite materials is significantly strengthened, and the separation ability of the photo-generated carriers is remarkably improved. Therefore, compared with pure g-C<sub>3</sub>N<sub>4</sub>, the photocatalytic degradation activity of the composite system on MB and RhB is outstandingly enhanced. Furthermore, after partially replacing S with Se through selenization, the resulting heterojunction structure exhibits stronger photocatalytic degradation performance. For example, the 4-GSe sample obtained at a selenization temperature of 140 °C can achieve a degradation rate of 96% for MB within 60 min and a degradation rate of 95% for RhB within 90 min. Moreover, the prepared heterojunction structure can still maintain excellent photocatalytic degradation activity even in complex dye wastewater. This study offers innovative insights for the development of high-performance photocatalysts capable of efficiently degrading complex organic dye wastewater.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhancement of the photocatalytic activity of g-C3N4/Sb2(S,Se)3 heterojunction via effective interfacial charge transfer

  • 期刊论文

  • 发表日期：

    2026年1月7日

查看全文
  • Junfei Fang,
  • Lei Liu,
  • Hang Yang,
  • Yulong Sun,
  • Rui Feng,
  • Liang Li,
  • Jianping Deng,
  • Yuchun Gou

摘要

Graphitic carbon nitride (g-C3N4) is a material with a graphite-like layered structure. Due to its non-toxic and harmless nature, stable performance, and visible light response capability, g-C3N4 holds significant application prospects in the field of photocatalysis. In this study, the Sb2(S,Se)3 was coupled with g-C3N4 to construct a heterojunction structure, and the photocatalytic degradation performance of the g-C3N4/Sb2(S,Se)3 heterojunction materials on organic dye pollutants was investigated. Firstly, the g-C3N4/Sb2S3 composite samples were prepared using a hydrothermal reaction. Subsequently, the g-C3N4/Sb2(S,Se)3 heterojunction structures were constructed through selenization, and then they were used in the efficient photocatalytic degradation process of organic pollutants methylene blue (MB) and rhodamine B (RhB). The results indicate that due to the formation of the heterojunction structure, the light absorption performance of the g-C3N4/Sb2S3 and g-C3N4/Sb2(S,Se)3 composite materials is significantly strengthened, and the separation ability of the photo-generated carriers is remarkably improved. Therefore, compared with pure g-C3N4, the photocatalytic degradation activity of the composite system on MB and RhB is outstandingly enhanced. Furthermore, after partially replacing S with Se through selenization, the resulting heterojunction structure exhibits stronger photocatalytic degradation performance. For example, the 4-GSe sample obtained at a selenization temperature of 140 °C can achieve a degradation rate of 96% for MB within 60 min and a degradation rate of 95% for RhB within 90 min. Moreover, the prepared heterojunction structure can still maintain excellent photocatalytic degradation activity even in complex dye wastewater. This study offers innovative insights for the development of high-performance photocatalysts capable of efficiently degrading complex organic dye wastewater.