Hierarchical Mesoporous Metal–Organic Frameworks for Enhanced CO2 Capture. Issue 43 (10th September 2015)

• Record Type: Journal Article
• Authors: Mao, Yiyin; Chen, Danke; Hu, Pan; Guo, Yi; Ying, Yulong; Ying, Wen; Peng, Xinsheng
• Is Part Of: Chemistry. Volume 21:Issue 43(2015)
• Page Start: 15127
• Page End: 15132
• Publication Date: 2015-09-10
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201502515
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 CO₂ 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 CO₂ uptake is above 25 % at pressures up to 20 kPa and 7 % at 100 kPa. The mesoporous structures not only enhance the CO₂ uptake capacity but also improve the diffusion and mass transportation of CO₂. 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.</p> </abstract>