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Transformation of metal-organic frameworks for molecular sieving membranes.


ABSTRACT: The development of simple, versatile strategies for the synthesis of metal-organic framework (MOF)-derived membranes are of increasing scientific interest, but challenges exist in understanding suitable fabrication mechanisms. Here we report a route for the complete transformation of a series of MOF membranes and particles, based on multivalent cation substitution. Through our approach, the effective pore size can be reduced through the immobilization of metal salt residues in the cavities, and appropriate MOF crystal facets can be exposed, to achieve competitive molecular sieving capabilities. The method can also be used more generally for the synthesis of a variety of MOF membranes and particles. Importantly, we design and synthesize promising MOF membranes candidates that are hard to achieve through conventional methods. For example, our CuBTC/MIL-100 membrane exhibits 89, 171, 241 and 336 times higher H2 permeance than that of CO2, O2, N2 and CH4, respectively.

SUBMITTER: Li W 

PROVIDER: S-EPMC4838892 | biostudies-other | 2016

REPOSITORIES: biostudies-other

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Transformation of metal-organic frameworks for molecular sieving membranes.

Li Wanbin W   Zhang Yufan Y   Zhang Congyang C   Meng Qin Q   Xu Zehai Z   Su Pengcheng P   Li Qingbiao Q   Shen Chong C   Fan Zheng Z   Qin Lei L   Zhang Guoliang G  

Nature communications 20160419


The development of simple, versatile strategies for the synthesis of metal-organic framework (MOF)-derived membranes are of increasing scientific interest, but challenges exist in understanding suitable fabrication mechanisms. Here we report a route for the complete transformation of a series of MOF membranes and particles, based on multivalent cation substitution. Through our approach, the effective pore size can be reduced through the immobilization of metal salt residues in the cavities, and  ...[more]

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