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<p>Developing uniformly dispersed heterojunction photocatalysts with highly coupled interfaces is critical for increasing the photocatalytic efficiency of semiconductor photocatalysts. We used an in-situ self-transformation technique to create an efficient heterojunction photocatalyst from g-C<sub>3</sub>N<sub>4</sub> and CdS. Melamine-CdS composites were used as a precursor in this synthesis. The microscopic observations revealed that CdS nanoparticles were distributed uniformly on the g-C<sub>3</sub>N<sub>4</sub> base. FTIR and XRD spectra ascertained that g-C<sub>3</sub>N<sub>4</sub> and CdS cohabit in the photocatalyst samples. The synthesized binary photocatalysts were used for hydrogen evolution and the degradation of synthetic dyes from wastewater under simulated sunlight irradiation. Rhodamine B and Methyl orange in solution were decomposed under induced visible light exposure. The g-C<sub>3</sub>N<sub>4</sub>/CdS showed catalytic dye removal efficiency of 74.03% and 84.03% against methyl orange&#xa0;and&#xa0;Rhodamine B, respectively. During water splitting experiments, g-C<sub>3</sub>N<sub>4</sub>/CdS heterojunction showed a reasonable H<sub>2</sub> production rate of 2910 µmolh<sup>−1</sup>&#xa0;g<sup>−1</sup> after five hours of light exposure. The catalytic activity, rate constant, and stability of the composite photocatalyst were significantly higher than pure g-C<sub>3</sub>N<sub>4</sub> and CdS.</p>

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In-Situ Self-Transformation Growth of Binary g-C3N4/CdS Heterojunctions for Efficient Hydrogen Evolution and Wastewater Treatment

  • 期刊论文

  • 发表日期：

    2025年3月14日

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  • Muhammad Irfan,
  • Muhammad Shoaib,
  • Humaira Hussain,
  • Muhammad Yasin Naz,
  • Shazia Shukrullah,
  • Saifur Rahman,
  • Salim Nasar Faraj Mursal,
  • Abdulnour Ali Jazem Ghanim

摘要

Developing uniformly dispersed heterojunction photocatalysts with highly coupled interfaces is critical for increasing the photocatalytic efficiency of semiconductor photocatalysts. We used an in-situ self-transformation technique to create an efficient heterojunction photocatalyst from g-C3N4 and CdS. Melamine-CdS composites were used as a precursor in this synthesis. The microscopic observations revealed that CdS nanoparticles were distributed uniformly on the g-C3N4 base. FTIR and XRD spectra ascertained that g-C3N4 and CdS cohabit in the photocatalyst samples. The synthesized binary photocatalysts were used for hydrogen evolution and the degradation of synthetic dyes from wastewater under simulated sunlight irradiation. Rhodamine B and Methyl orange in solution were decomposed under induced visible light exposure. The g-C3N4/CdS showed catalytic dye removal efficiency of 74.03% and 84.03% against methyl orange and Rhodamine B, respectively. During water splitting experiments, g-C3N4/CdS heterojunction showed a reasonable H2 production rate of 2910 µmolh−1 g−1 after five hours of light exposure. The catalytic activity, rate constant, and stability of the composite photocatalyst were significantly higher than pure g-C3N4 and CdS.