Core-Shell Type Ionic Liquid/Metal Organic Framework Composite: An Exceptionally High CO2/CH4 Selectivity

Muhammad Zeeshan; Vahid Nozari; M Baris Yagci; Tugba Isık; Ugur Unal; Volkan Ortalan; Seda Keskin; Alper Uzun

doi:10.1021/jacs.8b05802

Core-Shell Type Ionic Liquid/Metal Organic Framework Composite: An Exceptionally High CO₂/CH₄ Selectivity

J Am Chem Soc. 2018 Aug 15;140(32):10113-10116. doi: 10.1021/jacs.8b05802. Epub 2018 Jul 18.

Authors

Muhammad Zeeshan^{1

2}, Vahid Nozari^{1

2}, M Baris Yagci³, Tugba Isık⁴, Ugur Unal^{3

5}, Volkan Ortalan⁴, Seda Keskin^{1

2}, Alper Uzun^{1

2

3}

Affiliations

¹ Department of Chemical and Biological Engineering , Koç University , Rumelifeneri Yolu , 34450 Sariyer, Istanbul , Turkey.
² Koç University TÜPRAŞ Energy Center (KUTEM), Koç University , Rumelifeneri Yolu , 34450 Sariyer, Istanbul , Turkey.
³ Koç University Surface Science and Technology Center (KUYTAM) , Rumelifeneri Yolu , 34450 Sariyer, Istanbul , Turkey.
⁴ School of Materials Engineering and Birck Nanotechnology Center , Purdue University , West Lafayette , Indiana 47907 , United States.
⁵ Department of Chemistry , Koç University , Rumelifeneri Yolu , 34450 Sariyer, Istanbul , Turkey.

PMID: 30005163
DOI: 10.1021/jacs.8b05802

Abstract

Here, we present a new concept of a core-shell type ionic liquid/metal organic framework (IL/MOF) composite. A hydrophilic IL, 1-(2-hydroxyethyl)-3-methylimidazolium dicyanamide, [HEMIM][DCA], was deposited on a hydrophobic zeolitic imidazolate framework, ZIF-8. The composite exhibited approximately 5.7 times higher CO₂ uptake and 45 times higher CO₂/CH₄ selectivity at 1 mbar and 25 °C compared to the parent MOF. Characterization showed that IL molecules deposited on the external surface of the MOF, forming a core (MOF)-shell (IL) type material, in which IL acts as a smart gate for the guest molecules.

Publication types

Research Support, Non-U.S. Gov't