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Hierarchical Mesoporous Metal–Organic Frameworks for Enhanced CO 2 Capture
Author(s) -
Mao Yiyin,
Chen Danke,
Hu Pan,
Guo Yi,
Ying Yulong,
Ying Wen,
Peng Xinsheng
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201502515
Subject(s) - mesoporous material , materials science , porosity , sorption , membrane , chemical engineering , etching (microfabrication) , nanotechnology , diffusion , metal organic framework , ligand (biochemistry) , catalysis , chemistry , adsorption , composite material , organic chemistry , biochemistry , physics , receptor , layer (electronics) , engineering , thermodynamics
Hierarchical porous materials are promising for catalyst, separation and sorption applications. A ligand‐assisted etching process is developed for template‐free synthesis of hierarchical mesoporous MOFs as single crystals and well‐intergrown membranes at 40 °C. At 223 K, the hierarchical porous structures significantly improve the CO 2 capture capacity of HKUST‐1 by more than 44 % at pressures up to 20 kPa and 13 % at 100 kPa. Even at 323 K, the enhancement of CO 2 uptake is above 25 % at pressures up to 20 kPa and 7 % at 100 kPa. The mesoporous structures not only enhance the CO 2 uptake capacity but also improve the diffusion and mass transportation of CO 2 . Similarly, well‐intergrown mesoporous HKUST‐1 membranes are synthesized, which hold the potential for film‐like porous devices. Mesoporous MOF‐5 crystals are also obtained by a similar ligand‐assisted etching process. This may provide a facile way to prepare hierarchical porous MOF single crystals and membranes for wide‐ranging applications.