Enhanced CO2 adsorption in nano-ZIF-8 modified by solvent assisted ligand exchange

Chih Wei Tsai, J.W. Niemantsverdriet, Ernie H.G. Langner

Research output: Contribution to journalArticleAcademicpeer-review

16 Citations (Scopus)

Abstract

The organic linkers of Zeolitic Imidazole Framework-8 (ZIF-8) nanoparticles influence its adsorption of CO2 gases. Solvent Assisted Ligand Exchange (SALE) was successfully used to exchange ∼ 13% of the 2-methylimidazolate linkers of ZIF-8 nanoparticles with 2-mercaptobenzimidazole, 2-aminobenzimidazole or 2-phenylimidazole. With 2-nitroimidiazole ∼67% exchange was achieved, since no bulky benzyl groups were present. During SALE treatment the SOD (sodalite zeolitic framework type) topology of ZIF-8 was maintained, but after the higher exchange percentage of 2-nitroimidazole an frl topology was observed. Up to a two-fold increase in CO2 adsorption was recorded after SALE of ZIF-8 with imidazole derivatives containing NO2 and SH electron withdrawing functional groups. In the case of 2-aminobenzimidazole only a moderate increase in CO2 adsorption was observed.

Original languageEnglish
Pages (from-to)98-105
Number of pages8
JournalMicroporous and Mesoporous Materials
Volume262
DOIs
Publication statusPublished - 15 May 2018

Keywords

  • CO adsorption
  • Nanoparticles
  • Solvent assisted ligand exchange
  • ZIF-8

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