Novel pyrazole-based MOF synergistic polymer of intrinsic microporosity membranes for high-efficient CO2 capture
2022; Elsevier BV; Volume: 664; Linguagem: Inglês
10.1016/j.memsci.2022.121107
ISSN1873-3123
AutoresQin Shen, Shenzhen Cong, Junyong Zhu, Yiming Zhang, Rong‐Rong He, Shouliang Yi, Yatao Zhang,
Tópico(s)Covalent Organic Framework Applications
ResumoAdvanced membranes with high gas separation performances are highly demanded for energy-efficient CO2 capture. Nonetheless, the ubiquitous "trade-off" relation between permeability and selectivity remains a daunting challenge for currently synthetic membranes. Here, a novel category of pyrazole-based MOF (termed as MOF-303 or Al(OH)HPDC) as nanofillers was firstly blended into the polymer of intrinsic microporosity (PIM-1) matrix to fabricate MOF-303/PIM-1 mixed matrix membranes (MMMs). Owing to their superiorities of CO2-philic ability, high porosity and suitable aperture sizes, the presence of MOF-303 in membrane could create additional CO2 transport nanochannels, thus promoting the rapid transport of CO2 molecules across the blended membrane. As a result, this newly-developed membrane containing 10 wt% MOF-303 nanofilles evince a remarkably high CO2 permeability of 6602.8 Barrer, with a comparably ideal CO2/N2 selectivity of 25.6. This corresponding separation performance far surpasses the most popular 2008 Robeson's upper bond, and approaches the refined 2019 Robeson's upper bond. This study may provide a novel avenue to apply pyrazole-based MOFs in fabricating the facilitated transport membranes applied in industrial CO2 capture.
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