TY - JOUR
T1 - Microstructural optimization of NH2-MIL-125 membranes with superior H2/CO2 separation performance by innovating metal sources and heating modes
AU - Sun, Yanwei
AU - Song, Chunshan
AU - Guo, Xinwen
AU - Hong, Sungwon
AU - Choi, Jungkyu
AU - Liu, Yi
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (21176231), Liaoning Revitalization Talents Program (XLYC1807084), Thousand Youth Talents Program, the Pennsylvania State University and Technology Innovation Team of Dalian University of Technology (DUT2017TB01) for the financial support.
Funding Information:
This work was supported by National Natural Science Foundation of China ( 21176231 ), Liaoning Revitalization Talents Program ( XLYC1807084 ), Thousand Youth Talents Program , the Pennsylvania State University and Technology Innovation Team of Dalian University of Technology ( DUT2017TB01 ) for the financial support.
Publisher Copyright:
© 2020 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/12/15
Y1 - 2020/12/15
N2 - Metal-organic framework (MOF) membranes have received increasing attention due to their unprecedented potential for energy-efficient gas separation. Compared with other MOF materials (like ZIF), fabrication and microstructural manipulation of high-performance Ti-MOF-based membranes, although being very attractive due to their excellent chemical and thermal stability, remained relatively less investigated due to the limitations of available titanium sources and heating modes. In this study, different Ti sources (TPOT, TiS2, and MXene) and heating modes (conventional heating, multi-mode microwave heating, and single-mode microwave heating) were examined for the preparation of NH2-MIL-125 membranes showing diverse microstructures and gas separation performances. The present work revealed that for the first time, MXene, the new two-dimensional Ti carbide, could be used as Ti source for synthesizing MOF membranes. The best performing NH2-MIL-125 membranes, which were obtained with TiS2 as the metal source under single-mode microwave heating, exhibited the highest H2/CO2 selectivity (ca. 17.2) as well as considerable H2 permeance (1.7 × 10−7 mol m−2 s−1 Pa−1), owing to an enhanced non-thermal effect of single-mode microwave heating and balanced dissolution rate of TiS2.
AB - Metal-organic framework (MOF) membranes have received increasing attention due to their unprecedented potential for energy-efficient gas separation. Compared with other MOF materials (like ZIF), fabrication and microstructural manipulation of high-performance Ti-MOF-based membranes, although being very attractive due to their excellent chemical and thermal stability, remained relatively less investigated due to the limitations of available titanium sources and heating modes. In this study, different Ti sources (TPOT, TiS2, and MXene) and heating modes (conventional heating, multi-mode microwave heating, and single-mode microwave heating) were examined for the preparation of NH2-MIL-125 membranes showing diverse microstructures and gas separation performances. The present work revealed that for the first time, MXene, the new two-dimensional Ti carbide, could be used as Ti source for synthesizing MOF membranes. The best performing NH2-MIL-125 membranes, which were obtained with TiS2 as the metal source under single-mode microwave heating, exhibited the highest H2/CO2 selectivity (ca. 17.2) as well as considerable H2 permeance (1.7 × 10−7 mol m−2 s−1 Pa−1), owing to an enhanced non-thermal effect of single-mode microwave heating and balanced dissolution rate of TiS2.
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U2 - 10.1016/j.memsci.2020.118615
DO - 10.1016/j.memsci.2020.118615
M3 - Article
AN - SCOPUS:85089947485
SN - 0376-7388
VL - 616
JO - Journal of Membrane Science
JF - Journal of Membrane Science
M1 - 118615
ER -