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The photocatalytic fuel cell (PFC) represents a green and sustainable technology capable of treating organic pollutants while simultaneously generating electricity. Graphitic carbon nitride (g-C3N4) was synthesized via the calcination method. The synthesized g-C3N4 was characterized and confirmed by using X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy. A PFC was assembled with a carbon plate loaded with g-C3N4 (g-C3N4/C) serving as the photocathode, and another carbon plate loaded with zinc oxide (ZnO/C) acting as the photoanode. In the PFC evaluation, 10 ppm of azo dye Reactive Red 120 (RR120) was applied as the organic pollutant which was irradiated under UV light over 6 h of reaction time. The objective of this study was to investigate the effect of g-C3N4 as a cathodic catalyst in the PFC. The results demonstrate that the photocatalytic activity of the PFC was enhanced by the addition of g-C3N4 on the carbon plate as a photocathode, leading to improved RR120 color removal and electricity generation. Specifically, the photocathode with g-C3N4/C exhibited a color removal efficiency of 98.17% and a maximum power density of 0.8667 mW m−2, surpassing the bare carbon plate photocathode, which achieved a color removal efficiency of 87.49% and a maximum power density of 0.5902 mW m−2 after 6 h of UV light irradiation.

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Performance of Graphitic Carbon Nitride Loaded Carbon Plate as the Photocathode in Photocatalytic Fuel Cell for Azo Dye Degradation and Electricity Generation

  • 会议论文

  • 发表日期：

    2025年

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  • Kang-Zheng Khor,
  • Li-Ngee Ho,
  • Nabilah Aminah Lutpi,
  • Yunhai Wang,
  • Jai-Xien OrYang,
  • Soon-An Ong

摘要

The photocatalytic fuel cell (PFC) represents a green and sustainable technology capable of treating organic pollutants while simultaneously generating electricity. Graphitic carbon nitride (g-C3N4) was synthesized via the calcination method. The synthesized g-C3N4 was characterized and confirmed by using X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectroscopy. A PFC was assembled with a carbon plate loaded with g-C3N4 (g-C3N4/C) serving as the photocathode, and another carbon plate loaded with zinc oxide (ZnO/C) acting as the photoanode. In the PFC evaluation, 10 ppm of azo dye Reactive Red 120 (RR120) was applied as the organic pollutant which was irradiated under UV light over 6 h of reaction time. The objective of this study was to investigate the effect of g-C3N4 as a cathodic catalyst in the PFC. The results demonstrate that the photocatalytic activity of the PFC was enhanced by the addition of g-C3N4 on the carbon plate as a photocathode, leading to improved RR120 color removal and electricity generation. Specifically, the photocathode with g-C3N4/C exhibited a color removal efficiency of 98.17% and a maximum power density of 0.8667 mW m−2, surpassing the bare carbon plate photocathode, which achieved a color removal efficiency of 87.49% and a maximum power density of 0.5902 mW m−2 after 6 h of UV light irradiation.