Journal
NANOSCALE
Volume 7, Issue 46, Pages 19408-19412Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr06532a
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- Boston College
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The creation of hierarchical porosity in metal-organic frameworks (MOFs) could benefit various applications of MOFs such as gas storage and separation. Having single-crystalline microcrystals instead of poly-crystalline composites is critical for these potential applications of MOFs with hierarchical porosity. We developed a room temperature synthetic method to generate uniform hollow and mesoporous zeolitic imidazolate framework-8 (ZIF-8) microcrystals with a single-crystalline structure via overgrowing a ZIF-8 shell in methanol solution on a ZIF-8 core with water adsorbed in the pores. The cavities formed as a result of the different solvent microenvironment. This double-solvent mediated overgrowth method could be applied to prepare other MOFs with hierarchical porosity.
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