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<p>In this study, using HKUST-1 as the base, g-C<sub>3</sub>N<sub>4</sub> and HKUST-1 were mixed by solvothermal method to form graphitic carbon nitride MOF material, and then modified with Fe<sub>3</sub>O<sub>4</sub> nanoparticles to form the final composite Fe<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>/HKUST-1.The composite Fe<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>/HKUST-1 was characterized by XRD, FT-IR, SEM, VSM, BET and XPS. By studying the adsorption properties of g-C<sub>3</sub>N<sub>4</sub>/HKUST-1 and Fe<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>/HKUST-1 on La<sup>3+</sup> under different conditions, the optimal adsorption conditions were established. Kinetic and isothermal thermodynamic models were used to evaluate the stability and regeneration capacity of the adsorbent. The results show that the composite Fe<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>/HKUST-1 has excellent La<sup>3+</sup> recovery performance and magnetic properties, and has good stability and recovery performance. Through a series of optimization experiments on adsorbents, when pH is 6, the adsorption effect of Fe<sub>3</sub>O<sub>4</sub>/g-C<sub>3</sub>N<sub>4</sub>/HKUST-1 is the best, and the adsorption saturation state is reached within 30&#xa0;min, and the adsorption capacity can reach 225.11&#xa0;mg/g, which has great potential in environmental management and resource recovery.</p>

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Fast and efficient adsorption of La(III) on magnetic carbon nitride-based HKUST-1 composites

  • 期刊论文

  • 发表日期：

    2025年5月17日

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  • Dan Xu,
  • Feiyan Liu,
  • Xiao Liu,
  • Jiaming Wang,
  • Xiancai Li

摘要

In this study, using HKUST-1 as the base, g-C3N4 and HKUST-1 were mixed by solvothermal method to form graphitic carbon nitride MOF material, and then modified with Fe3O4 nanoparticles to form the final composite Fe3O4/g-C3N4/HKUST-1.The composite Fe3O4/g-C3N4/HKUST-1 was characterized by XRD, FT-IR, SEM, VSM, BET and XPS. By studying the adsorption properties of g-C3N4/HKUST-1 and Fe3O4/g-C3N4/HKUST-1 on La3+ under different conditions, the optimal adsorption conditions were established. Kinetic and isothermal thermodynamic models were used to evaluate the stability and regeneration capacity of the adsorbent. The results show that the composite Fe3O4/g-C3N4/HKUST-1 has excellent La3+ recovery performance and magnetic properties, and has good stability and recovery performance. Through a series of optimization experiments on adsorbents, when pH is 6, the adsorption effect of Fe3O4/g-C3N4/HKUST-1 is the best, and the adsorption saturation state is reached within 30 min, and the adsorption capacity can reach 225.11 mg/g, which has great potential in environmental management and resource recovery.