New strategy to synthesis of hierarchical porous ZIF-8 for enhanced mass transport inside the pore

Yunjin Kim, Gyeongho Yun, Suhyeon Cho, Minho Nam, Yunchan Kang, Seunghyup Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Metal–organic frameworks (MOFs), a new class of porous crystalline materials, have attracted significant interest for potential applications in gas separation, storage, and catalysis. The application of zeolitic imidazolate framework-8 (ZIF-8), a versatile MOF based on imidazolate ligands, is hindered by its structure. The microporous ZIF-8 structure has a negative effect on diffusion and mass transfer, which can lead to a low diffusion rate of reactants larger than 2 nm. To overcome these disadvantages, the concept of superstructured hierarchical porous ZIF-8 (HPZIF-8) micro-particle has been presented, which consists of two different pore structures (micropore and mesopore). We propose a simple aggregation method to enhance the controllability and performance of ZIF-8 in a water-based environment. Compared with the same-sized ZIF-8 particles, the HPZIF-8 particles can reach the higher mass transfer through the mesopores and lead to high diffusion rates. To demonstrate the performance enhancement, the fabricated HPZIF-8 was characterized as a photocatalyst for removing methylene blue from water. The two different pore structures of HPZIF-8 resulted in improved catalytic performance. These results could inspire MOFs research for applications such as carbon dioxide capture and catalysis.

Original languageEnglish
Article number60
JournalJournal of Nanoparticle Research
Volume25
Issue number4
DOIs
Publication statusPublished - 2023 Apr

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF, NRF-2020M3H4A3106409) grant funded by the Korean government (MSIT).

Publisher Copyright:
© 2023, The Author(s), under exclusive licence to Springer Nature B.V.

Keywords

  • Aggregated nano particle
  • Carbon dioxide capture relevance
  • Catalysis
  • Hierarchical porous particle
  • ZIF-8

ASJC Scopus subject areas

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • General Chemistry
  • Modelling and Simulation
  • General Materials Science
  • Condensed Matter Physics

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