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<p>The present work constructs a novel Ag₂S/CN composite photocatalyst via in-situ hydrothermal method. The photocatalytic performance of the obtained Ag₂S/CN composite was meticulously evaluated through the degradation of methyl orange (MO) under visible light irradiation. Compared to pure CN and Ag₂S, the Ag₂S/CN composite exhibited significantly enhanced photocatalytic performance. Specifically, the optimal Ag₂S/CN (0.4) sample achieved activities that were 70 and 5 times higher than those of Ag₂S and CN, respectively. This remarkable enhancement can be attributed to the reduced band gap and expanded light absorption range of CN when combined with Ag₂S. Additionally, the surface plasmon resonance (SPR) effect of Ag<sup>0</sup> nanoparticles generated during photodegradation further improves photocatalytic performance by facilitating the separation of photogenerated carriers. Based on photoelectrochemical properties and active species trapping experiments, a plausible mechanism involving hydroxyl radicals (·OH) and superoxide radicals (·O₂⁻) is proposed. The combination of wide-bandgap and narrow-bandgap semiconductors offers a promising strategy for developing efficient photocatalysts for wastewater treatment.</p>

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In-Situ Hydrothermal Construction of Ag2S/CN Composite Photocatalyst for Superior Degradation of Methyl Orange in Aqueous Solution

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Xiao-qiang Feng,
  • Jing-wen Hou,
  • Xiao-ning Dong,
  • Xiao-fang Li

摘要

The present work constructs a novel Ag₂S/CN composite photocatalyst via in-situ hydrothermal method. The photocatalytic performance of the obtained Ag₂S/CN composite was meticulously evaluated through the degradation of methyl orange (MO) under visible light irradiation. Compared to pure CN and Ag₂S, the Ag₂S/CN composite exhibited significantly enhanced photocatalytic performance. Specifically, the optimal Ag₂S/CN (0.4) sample achieved activities that were 70 and 5 times higher than those of Ag₂S and CN, respectively. This remarkable enhancement can be attributed to the reduced band gap and expanded light absorption range of CN when combined with Ag₂S. Additionally, the surface plasmon resonance (SPR) effect of Ag0 nanoparticles generated during photodegradation further improves photocatalytic performance by facilitating the separation of photogenerated carriers. Based on photoelectrochemical properties and active species trapping experiments, a plausible mechanism involving hydroxyl radicals (·OH) and superoxide radicals (·O₂⁻) is proposed. The combination of wide-bandgap and narrow-bandgap semiconductors offers a promising strategy for developing efficient photocatalysts for wastewater treatment.