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The photocatalytic method has the advantages of high efficiency and recyclability in wastewater treatmentWastewater treatment. Carbon nitride (g-C3N4)G-CN has attracted much attention as an efficient photocatalytic material due to its unique properties, while still facing the disadvantage of a small specific surface area and high photogenic carrier recombination rate. In this work, the photocatalytic performance of g-C3N4G-CN was improved by stripping layered g-C3N4 particles with NH4Cl. The conditions for effective synthesis of g-C3N4 and degradation to harmful azo dye Congo Red processes were optimized. In addition, the effects of g-C3N4G-CN on the removal rates of CR and chroma in simulated wastewater were evaluated. The results showed that for 100 mg/L CR solution, using 0.6 g/L catalyst for photocatalytic degradation, the removal rate reached 95% after 2 h of light irradiation, and showed excellent recycling performance. This work can provide a new solution to the practical application of photocatalysts for the degradation of dye pollutants.

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Study on Photocatalytic Degradation of Azo Dye Wastewater by Thermal Stripping of g-C3N4

  • 会议论文

  • 发表日期：

    2025年

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  • Renwen Li,
  • Yifan Du,
  • Chunke Tang,
  • Yanfang Huang,
  • Guihong Han

摘要

The photocatalytic method has the advantages of high efficiency and recyclability in wastewater treatmentWastewater treatment. Carbon nitride (g-C3N4)G-CN has attracted much attention as an efficient photocatalytic material due to its unique properties, while still facing the disadvantage of a small specific surface area and high photogenic carrier recombination rate. In this work, the photocatalytic performance of g-C3N4G-CN was improved by stripping layered g-C3N4 particles with NH4Cl. The conditions for effective synthesis of g-C3N4 and degradation to harmful azo dye Congo Red processes were optimized. In addition, the effects of g-C3N4G-CN on the removal rates of CR and chroma in simulated wastewater were evaluated. The results showed that for 100 mg/L CR solution, using 0.6 g/L catalyst for photocatalytic degradation, the removal rate reached 95% after 2 h of light irradiation, and showed excellent recycling performance. This work can provide a new solution to the practical application of photocatalysts for the degradation of dye pollutants.