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<p>This study aims to address the urgent challenge of optimizing ZIF-8 adsorbent properties such as morphological stability, recyclability and applied practicality in the field of wastewater treatment. Herein, we study a macroscopic three-dimensional (3D) Imidazolate Framework-8(ZIF-8) nanosheet aerogel synthesized via a facile freeze-drying strategy with carboxymethyl cellulose (CMC) as a binder, overcoming the aggregation and recyclability bottlenecks of conventional MOF adsorbents. SEM, BET and XRD analyses revealed the ZIF-8/CMC aerogel exhibited an obvious developed porous lamellar network structure and high specific surface area. ZIF-8/CMC displayed an ideal synchronous adsorption ability and stability with a maximum TC and Cu<sup>2+</sup> adsorption capacity 78.75&#xa0;mg/g and 79.71&#xa0;mg/g, significantly outperforming most macroscopic adsorbents, moreover, the removal efficiency of TC and Cu<sup>2+</sup> all remain above 75% after fifth circular recovery. The entire adsorption process was spontaneous and endothermic, consistent with the pseudo-first-order kinetic model and Langmuir adsorption isotherm model. Hence, ZIF-8/CMC demonstrated great potential and promising practicability in separation and removal of antibiotic and heavy metal contaminants.</p>

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Preparation of 3D ZIF-8/CMC Aerogels for Simultaneous and Sustainable Removal of Copper and Tetracycline from Pharmaceutical Solution

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Wei Li,
  • Boyang Wang,
  • Mengya Guo,
  • Ning Liu,
  • Yalin Liu,
  • Tao Xiang

摘要

This study aims to address the urgent challenge of optimizing ZIF-8 adsorbent properties such as morphological stability, recyclability and applied practicality in the field of wastewater treatment. Herein, we study a macroscopic three-dimensional (3D) Imidazolate Framework-8(ZIF-8) nanosheet aerogel synthesized via a facile freeze-drying strategy with carboxymethyl cellulose (CMC) as a binder, overcoming the aggregation and recyclability bottlenecks of conventional MOF adsorbents. SEM, BET and XRD analyses revealed the ZIF-8/CMC aerogel exhibited an obvious developed porous lamellar network structure and high specific surface area. ZIF-8/CMC displayed an ideal synchronous adsorption ability and stability with a maximum TC and Cu2+ adsorption capacity 78.75 mg/g and 79.71 mg/g, significantly outperforming most macroscopic adsorbents, moreover, the removal efficiency of TC and Cu2+ all remain above 75% after fifth circular recovery. The entire adsorption process was spontaneous and endothermic, consistent with the pseudo-first-order kinetic model and Langmuir adsorption isotherm model. Hence, ZIF-8/CMC demonstrated great potential and promising practicability in separation and removal of antibiotic and heavy metal contaminants.