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Abstract <p>To enhance the photocatalytic performance of C<sub>3</sub>N<sub>4</sub> materials, g-C<sub>3</sub>N<sub>4</sub>/MgO heterojunction composites were efficiently synthesized from C<sub>3</sub>N<sub>4</sub> and Mg(OH)<sub>2</sub> through a rapid heat treatment method. The photocatalytic degradation efficacy of the catalysts was assessed using methylene blue as the target pollutant under simulated solar irradiation. The findings revealed that rapid heat treatment facilitated the oxidative and thermal exfoliation of C<sub>3</sub>N<sub>4</sub> powders, which subsequently formed micron-scale agglomerates upon compositing with MgO derived from the decomposition of Mg(OH)<sub>2</sub>. The resulting C<sub>3</sub>N<sub>4</sub>/MgO composites greatly broadened the spectrum of visible light utilization, thereby enhancing photocatalytic performance. Notably, the g-C<sub>3</sub>N<sub>4</sub>/10% MgO composites exhibited the highest activity, achieving a remarkable 99.2% degradation rate of a methylene blue solution at a concentration of 10 mg/L within 45 min of simulated solar exposure.</p>

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Rapid Preparation of C3N4/MgO Composites by Thermal Exfoliation Method and Their Photocatalytic Degradation Properties

  • 期刊论文

  • 发表日期：

    2025年8月1日

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  • S. S. Xu,
  • Q. Q. Wang,
  • C. W. Lai,
  • J. X. Li

摘要

Abstract

To enhance the photocatalytic performance of C3N4 materials, g-C3N4/MgO heterojunction composites were efficiently synthesized from C3N4 and Mg(OH)2 through a rapid heat treatment method. The photocatalytic degradation efficacy of the catalysts was assessed using methylene blue as the target pollutant under simulated solar irradiation. The findings revealed that rapid heat treatment facilitated the oxidative and thermal exfoliation of C3N4 powders, which subsequently formed micron-scale agglomerates upon compositing with MgO derived from the decomposition of Mg(OH)2. The resulting C3N4/MgO composites greatly broadened the spectrum of visible light utilization, thereby enhancing photocatalytic performance. Notably, the g-C3N4/10% MgO composites exhibited the highest activity, achieving a remarkable 99.2% degradation rate of a methylene blue solution at a concentration of 10 mg/L within 45 min of simulated solar exposure.