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<p>The construction of heterojunction photocatalysts as an effective strategy have been widely used in the eradication of organic dyes in wastewater. Herein, we designed a series of CdS/g-C<sub>3</sub>N<sub>4</sub> heterostructures by solid-state thermolysis assisted ultrasonic dispersion method, anchoring 1D CdS onto the surface of 2D g-C<sub>3</sub>N<sub>4</sub>, and applied to the degradation of methyl orange (MO) under visible light. The ultra-thin nanosheets of 2D g-C<sub>3</sub>N<sub>4</sub> and typical heterostructures of CdS/g-C<sub>3</sub>N<sub>4</sub> composites were determined by a series of morphological characterizations. The resulting photocatalysts exhibited enhanced photocatalytic MO removal efficiency and stability than CdS and g-C<sub>3</sub>N<sub>4</sub>, and shown excellent degradation performance for many other organic dyes such as RhB, MB, MG, and CR. The active radicals in the degradation system were investigated by quenching experiments, and the dominant role of <sup>•</sup>O<sub>2</sub><sup>−</sup> was verified. Additionally, a plausible photocatalytic mechanism of S-Scheme heterojunction was proposed.</p> Graphical Abstract <p></p>

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Facile Construction of CdS/g-C3N4 Photocatalyst for Enhanced Removal of Methyl Orange

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Qiang Gao,
  • Mengnan Wang,
  • Yining Zhu,
  • Yongming Chai,
  • Bin Liu

摘要

The construction of heterojunction photocatalysts as an effective strategy have been widely used in the eradication of organic dyes in wastewater. Herein, we designed a series of CdS/g-C3N4 heterostructures by solid-state thermolysis assisted ultrasonic dispersion method, anchoring 1D CdS onto the surface of 2D g-C3N4, and applied to the degradation of methyl orange (MO) under visible light. The ultra-thin nanosheets of 2D g-C3N4 and typical heterostructures of CdS/g-C3N4 composites were determined by a series of morphological characterizations. The resulting photocatalysts exhibited enhanced photocatalytic MO removal efficiency and stability than CdS and g-C3N4, and shown excellent degradation performance for many other organic dyes such as RhB, MB, MG, and CR. The active radicals in the degradation system were investigated by quenching experiments, and the dominant role of •O2− was verified. Additionally, a plausible photocatalytic mechanism of S-Scheme heterojunction was proposed.

Graphical Abstract