4.7 Article

Hierarchical porous zeolitic imidazolate frameworks nanoparticles for efficient adsorption of rare-earth elements

期刊

MICROPOROUS AND MESOPOROUS MATERIALS
卷 278, 期 -, 页码 175-184

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2018.11.022

关键词

Metal-Organic frameworks; Zeolitic imidazolate frameworks; Adsorption; Rare earth elements; Hierarchical porous ZIF-8

资金

  1. Swedish Research Council (VR)
  2. Swedish Governmental Agency for Innovation Systems (VINNOVA)

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Hierarchical porous zeolitic imidazolate frameworks nanoparticles (ZIF-8 NPs) were synthesized at room temperature via a template-free approach under dynamic conditions (stirring) using water as a solvent. The ZIF-8 NPs were evaluated as adsorbents for rare earth elements (La3+, Sm3+ and Dy3+). Adsorption equilibrium was reached after 7h and high adsorption capacities were obtained for dysprosium and samarium (430.4 and 281.1 mg g(-1), respectively) and moderate adsorption capacity for lanthanum (28.8 mg g(-1)) at a pH of 7.0. The high adsorption capacitiese, as well as the high stability of ZIF-8 NPs, make the hierarchical ZIF-8 materials as an efficient adsorbent for the recovery of La3+, Sm3+ and Dy3+ from aqueous solution.

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