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<p>Using hydrothermal and calcination techniques, the Z-scheme WO<sub>3</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub> heterojunction composites were successfully fabricated. As an electron mediator, reduced graphene oxide (RGO) with high conductivity can generate high-speed charge transfer channels between g-C<sub>3</sub>N<sub>4</sub> and WO<sub>3</sub>, thereby promoting rapid electron transfer. Moreover, the thin and wrinkled structure of RGO exposes more edges and defects, which can better contact g-C<sub>3</sub>N<sub>4</sub> and WO<sub>3</sub>. Photoluminescence test confirmed that RGO’s excellent charge transfer characteristics effectively suppressed the electron–hole recombination of WO<sub>3</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub>. Visible-light-driven photocatalytic degradation experiments were conducted using rhodamine B (Rh B) as a representative pollutant. The results show that compared with WO<sub>3</sub> and g-C<sub>3</sub>N<sub>4</sub>, the visible photocatalytic activity of WO<sub>3</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub> composites is significantly improved. WO<sub>3</sub>/RGO/g-C<sub>3</sub>N<sub>4</sub> composites have higher surface area, greater abundance of active sites and better hole-electron separation rate. The construction of this ternary system effectively promotes the migration of interface charge carriers, effectively suppresses charge recombination, and results in improved photocatalytic activity.</p>

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Z-scheme ternary WO3/RGO/g-C3N4 heterojunction composite material for rapid degradation of rhodamine B under visible light

  • 期刊论文

  • 发表日期：

    2025年6月7日

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  • Yongxin Lu,
  • Teng Ma,
  • Siyi Yao,
  • Yuchao Zhang,
  • Haixia Liu,
  • Yujie Liu

摘要

Using hydrothermal and calcination techniques, the Z-scheme WO3/RGO/g-C3N4 heterojunction composites were successfully fabricated. As an electron mediator, reduced graphene oxide (RGO) with high conductivity can generate high-speed charge transfer channels between g-C3N4 and WO3, thereby promoting rapid electron transfer. Moreover, the thin and wrinkled structure of RGO exposes more edges and defects, which can better contact g-C3N4 and WO3. Photoluminescence test confirmed that RGO’s excellent charge transfer characteristics effectively suppressed the electron–hole recombination of WO3/RGO/g-C3N4. Visible-light-driven photocatalytic degradation experiments were conducted using rhodamine B (Rh B) as a representative pollutant. The results show that compared with WO3 and g-C3N4, the visible photocatalytic activity of WO3/RGO/g-C3N4 composites is significantly improved. WO3/RGO/g-C3N4 composites have higher surface area, greater abundance of active sites and better hole-electron separation rate. The construction of this ternary system effectively promotes the migration of interface charge carriers, effectively suppresses charge recombination, and results in improved photocatalytic activity.