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

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

doi:10.1016/j.micromeso.2017.11.024

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 journal › Article › Academic › peer-review

57 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 language	English
Pages (from-to)	98-105
Number of pages	8
Journal	Microporous and Mesoporous Materials
Volume	262
DOIs	https://doi.org/10.1016/j.micromeso.2017.11.024
Publication status	Published - 15 May 2018

Funding

This work was financially supported by Syngaschem BV. The authors acknowledge the use of the TEM at the Centre for Microscopy at the UFS. The authors are grateful to Dr. M. Rademeyer at the University of Pretoria for the measurements and discussions on PXRD. Appendix A

Keywords

CO adsorption
Nanoparticles
Solvent assisted ligand exchange
ZIF-8

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10.1016/j.micromeso.2017.11.024

Cite this

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title = "Enhanced CO2 adsorption in nano-ZIF-8 modified by solvent assisted ligand exchange",

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.",

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AU - Niemantsverdriet, J.W.

AU - Langner, Ernie H.G.

PY - 2018/5/15

Y1 - 2018/5/15

N2 - 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.

AB - 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.

KW - CO adsorption

KW - Nanoparticles

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