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Issue 47, 2015
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Pore surface engineering in porous, chemically stable covalent organic frameworks for water adsorption

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Abstract

Herein, we have explored the possibility of a class of covalent organic frameworks (COFs) as water adsorbing materials. We have selected, synthesized 12 chemically stable functionalized Schiff base COFs and thoroughly studied their water uptake behaviour. Further, a deep understanding was developed with these COFs towards the effects of condensation pressure of water and hydrophilic/hydrophobic groups present in the COF pores on water absorption capacity and ultimately, their recyclability. Among all reported COFs, TpPa-1 shows the highest water uptake of 30 wt% (368 cm3 g−1; 17 mmol g−1) at P/P0 = 0.3, which is also comparable with the recently reported carbon materials and few well known MOFs. This study also reveals that the overall water uptake of COFs can be tuned systematically based on chemical functionality and pore size in a wider window of relative pressures.

Graphical abstract: Pore surface engineering in porous, chemically stable covalent organic frameworks for water adsorption

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Article information


Submitted
06 Oct 2015
Accepted
05 Nov 2015
First published
05 Nov 2015

J. Mater. Chem. A, 2015,3, 23664-23669
Article type
Communication
Author version available

Pore surface engineering in porous, chemically stable covalent organic frameworks for water adsorption

B. P. Biswal, S. Kandambeth, S. Chandra, D. B. Shinde, S. Bera, S. Karak, B. Garai, U. K. Kharul and R. Banerjee, J. Mater. Chem. A, 2015, 3, 23664
DOI: 10.1039/C5TA07998E

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