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<p>Graphitic carbon nitride with defects and porous structure (dp-C<sub>3</sub>N<sub>4</sub>) was successfully synthesized by using silica microspheres as templates and treating graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) through a simple pyrolysis process. Defects were introduced through the partial breaking of chemical bond during the pyrolysis process, which contribute to the generation of electron-hole pairs and reduce their complexation. Compared to pristine g-C<sub>3</sub>N<sub>4</sub>, dp-C<sub>3</sub>N<sub>4</sub> has a narrow band gap, which enhances the absorption of visible light. Meanwhile, the design of the porous structure increases the specific surface area of the material, thus maximizing the exposure of active sites, which is conducive to the improvement of the substance transport efficiency during photocatalytic degradation. The experimental results confirmed that the efficiency of dp-C<sub>3</sub>N<sub>4</sub> in degrading pollutants such as Rhodamine B (RhB), Methyl Orange (MO) and Bisphenol A (BPA) was significantly higher than that of g-C<sub>3</sub>N<sub>4</sub>. In addition, the dp-C<sub>3</sub>N<sub>4</sub> exhibited effectively degradation for RhB in water under natural sunlight. The mechanism for the photocatalytic degradation of pollutants over dp-C<sub>3</sub>N<sub>4</sub> via photocatalysis has also been explained</p>

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Templated Synthesis of Porous Defect-Doped g-C3N4 with High Visible Light Photocatalytic Degradation Performance for Various Organic Components in Waste Water

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Ziyao Li,
  • Nan Wang,
  • Xuzhuo Sun,
  • Jing Chen,
  • Bo Li

摘要

Graphitic carbon nitride with defects and porous structure (dp-C3N4) was successfully synthesized by using silica microspheres as templates and treating graphitic carbon nitride (g-C3N4) through a simple pyrolysis process. Defects were introduced through the partial breaking of chemical bond during the pyrolysis process, which contribute to the generation of electron-hole pairs and reduce their complexation. Compared to pristine g-C3N4, dp-C3N4 has a narrow band gap, which enhances the absorption of visible light. Meanwhile, the design of the porous structure increases the specific surface area of the material, thus maximizing the exposure of active sites, which is conducive to the improvement of the substance transport efficiency during photocatalytic degradation. The experimental results confirmed that the efficiency of dp-C3N4 in degrading pollutants such as Rhodamine B (RhB), Methyl Orange (MO) and Bisphenol A (BPA) was significantly higher than that of g-C3N4. In addition, the dp-C3N4 exhibited effectively degradation for RhB in water under natural sunlight. The mechanism for the photocatalytic degradation of pollutants over dp-C3N4 via photocatalysis has also been explained