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Photocatalysts, which use light energy to decompose organic substances, are gaining attention as a method for wastewater treatment. The graphitic carbon nitride (g-C3N4) is a photocatalyst that reacts to visible light and is an important material for improving photocatalytic activity. However, it has a small surface area and sinks in water, making it inefficient for receiving light energy. In this study, the float type of g-C3N4 (FTg-C3N4) produced by hydrothermal synthesis and annealing of g-C3N4 was investigated by TEM. To compare the photocatalytic activity of g-C3N4 and FTg-C3N4, experiments on the degradation of rhodamine B (RhB) were also performed. As a result, a porous tube structure was observed and suspended in water. Therefore, it was able to receive more light energy than pure g-C3N4, resulting in improved degradation. In addition, self-cleaning experiments of FTg-C3N4 were conducted to investigate its later application in organic substance degradation while easily recovering it.

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High Photocatalytic Activity Floating g-C3N4: Using Light Energy to Clean Water

  • 章节

  • 发表日期：

    2026年

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  • Soichiro Kawashima,
  • Trang Nakamoto,
  • Kozo Taguchi

摘要

Photocatalysts, which use light energy to decompose organic substances, are gaining attention as a method for wastewater treatment. The graphitic carbon nitride (g-C3N4) is a photocatalyst that reacts to visible light and is an important material for improving photocatalytic activity. However, it has a small surface area and sinks in water, making it inefficient for receiving light energy. In this study, the float type of g-C3N4 (FTg-C3N4) produced by hydrothermal synthesis and annealing of g-C3N4 was investigated by TEM. To compare the photocatalytic activity of g-C3N4 and FTg-C3N4, experiments on the degradation of rhodamine B (RhB) were also performed. As a result, a porous tube structure was observed and suspended in water. Therefore, it was able to receive more light energy than pure g-C3N4, resulting in improved degradation. In addition, self-cleaning experiments of FTg-C3N4 were conducted to investigate its later application in organic substance degradation while easily recovering it.