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Efficient synthesis of surface-modified ZIF-8 for enhanced adsorption performance
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DOI：10.1016/j.colsurfa.2026.140570.png)
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Abstract
En 中文
Adsorption of antibiotic molecules using metal-organic frameworks (MOFs) normally relies on the exposure of external active sites on the adsorbent and the construction of hierarchical pores. Currently, most reported synthesis methods of porous MOFs are complex and inefficient. Herein, we propose a facile strategy for preparation of ZIF-8 nanoparticles and ZIF-8 nanoaggregates via high-gravity technology combined with surface modification process for the adsorption of tetracycline. Compared with unmodified ZIF-8 nanoparticles, the particle size of ZIF-8-KH550 can be significantly reduced from 22.6 nm to 8.2 nm, while the cluster-like ZIF-8-PVP with a hierarchical pore can be achieved. The adsorption capacity of ZIF-8-KH550 is 235 mg g-1, and that of ZIF-8-PVP is 216 mg g- 1, both of which are dramatically higher than that of unmodified ZIF-8 nanoparticles (188 mg g- 1), demonstrating significantly enhanced adsorption performance. More importantly, the adsorption rate constant of ZIF-8-PVP is nearly twice as that of unmodified nanoparticles, which is superior to most reported ZIF-8 materials. This work provides a new approach for the design and synthesis of MOFs with small sizes and abundant structures, further broadening their applications.
Keywords:
ZIF-8 controllable preparation
Surface modification
Tetracycline
Adsorption
Journal
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5.4
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153
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0
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