Remarkable enhancement of gas selectivity on organosilica hybrid membranes using urea-modulated metal-organic framework nanoparticles  

作　　者：Yayun Zhao Dechuan Zhao Chunlong Kong Yichao Lin Xuezhen Wang Liang Chen 

机构地区：[1]Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Collaboration Innovation Center for Tissue Repair Material Engineering Technology,China West Normal University,Nanchong 637009,China

出　　处：《Frontiers of Chemical Science and Engineering》2024年第2期83-92,共10页化学科学与工程前沿（英文版）

基　　金：supports of this work from“Pioneer”and“Leading Goose”R&D Program of Zhejiang Province(Grant No.2022C01029);National Natural Science Foundation of China(Grant No.21978309);Natural Science Foundation of Zhejiang Province(Grant No.LY21E020008);Youth Innovation Promotion Association,Chinese Acadenry of Sciences(Grant No.2020300);Ningbo Natural Science Foundation(Grant No.2023J354);Ningbo S&T Innovation 2025 Major Special Program(Grant No.2020Z036).

摘　　要：Metal-organic framework/organosilica hybrid membranes on tubular ceramic substrates have shown great potential for the implementation of membrane technology in practical gas separation projects due to their higher permeance compared to commercial polymers.However,the selectivities of the reported membranes are moderate.Here,we have incorporated urea-modulated metal-organic frameworks into organosilica membranes to greatly enhance its separation performance.The urea-modulated metal-organic frameworks exhibit less-defined edges of crystallographic facets and high defect density.They can be well-dispersed in the organosilica layer,which substantially suppresses the interfacial defects between metal-organic frameworks and organosilica,which is beneficial for improving the selectivity of membranes for gas separation.The results have shown that the enhanced ideal selectivity of H_(2)/CH_(4) was 165 and that of CO_(2)/CH_(4) was 43,with H_(2) permeance of about 1.25×10^(−6) mol·m^(−2)·s^(−1)·Pa^(−1) and CO_(2) permeance of 3.27×10^(−7) mol·m^(−2)·s^(−1)·Pa^(−1) at 0.2 MPa and 25℃.In conclusion,the high level of hybrid membranes can be used to separate H_(2)(or CO_(2))from the binary gas mixture H_(2)/CH_(4)(or CO_(2)/CH_(4)),which is important for gas separation in practical applications.Moreover,the simple and feasible modulation of metal-organic framework is a promising strategy to tune different metal-organic frameworks for membranes according to the actual demands.

关 键 词：ZIF-8 nanocrystals UREA ORGANOSILICA hybrid membrane enhanced separation performance 

分 类 号：TB383[一般工业技术—材料科学与工程]