Simultaneously Enhanced Hydrophilicity and Stability of a Metal-Organic Framework via Post-Synthetic Modification for Water Vapor Sorption/Desorption
- Johns Hopkins Univ., Baltimore, MD (United States); OSTI
- Johns Hopkins Univ., Baltimore, MD (United States); Kyungpook National Univ., Daegu (Korea, Republic of)
- Univ. of Delaware, Newark, DE (United States). Catalysis Center for Energy Innovation (CCEI)
- Univ. of Minnesota, Minneapolis, MN (United States)
- Johns Hopkins Univ., Laurel, MD (United States)
- Johns Hopkins Univ., Baltimore, MD (United States); Johns Hopkins Univ., Laurel, MD (United States)
With increasing demands for high-performance water sorption materials, metal-organic frameworks (MOFs) have gained considerable attention due to their high maximum uptake capacities. In many cases, however, high overall capacity is not necessarily accomplishing high working capacity under operating conditions, due to insufficient hydrophilicity and/or water stability. Herein, we present a post-synthetic modification (PSM) of MOF-808, with di-sulfonic acids enhancing simultaneously its hydrophilicity and water stability without sacrificing its uptake capacity of ≈30 mmol g-1. Further, di-sulfonic acid PSM enabled a shift of the relative humidity (RH) associated with a sharp step in water vapor sorption from 35–40 % RH in MOF-808 to below 25 % RH. While MOF-808 lost uptake capacity and crystallinity over multiple sorption/desorption cycles, the di-sulfonic acid PSM MOF-808 retained >80 % of the original capacity. PSM MOF-808 exhibited good hydrothermal stability up to 60 °C and high swing capacity.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Catalysis Center for Energy Innovation (CCEI); Univ. of Delaware, Newark, DE (United States); Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB)
- Grant/Contract Number:
- SC0001004; SC0008688
- OSTI ID:
- 2419579
- Journal Information:
- Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 44 Vol. 61; ISSN 1433-7851
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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