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

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

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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 H2/CH4 was 165 and that of CO2/CH4 was 43,with H2 permeance of about 1.25 × 10-6 mol·m-2·s-1·Pa-1 and CO2 permeance of 3.27 × 10-7 mol·m-2·s-1·Pa-1 at 0.2 MPa and 25 ℃.In conclu-sion,the high level of hybrid membranes can be used to separate H2(or CO2)from the binary gas mixture H2/CH4(or CO2/CH4),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.

ZIF-8 nanocrystalsureaorganosilicahybrid membraneenhanced separation performance

Yayun Zhao、Dechuan Zhao、Chunlong Kong、Yichao Lin、Xuezhen Wang、Liang Chen

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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

University of Chinese Academy of Sciences,Beijing 100049,China

Collaboration Innovation Center for Tissue Repair Material Engineering Technology,China West Normal University,Nanchong 637009,China

"Pioneer"and"Leading Goose"R&D Program of Zhejiang ProvinceNational Natural Science Foundation of ChinaNatural Science Foundation of Zhejiang ProvinceYouth Innovation Promotion Association,Chinese Acadenry of SciencesNingbo Natural Science FoundationNingbo S&T Innovation 2025 Major Special Program

2022C0102921978309LY21E02000820203002023J3542020Z036

2024

10.1007/s11705-024-2383-7

化学科学与工程前沿
高等教育出版社

化学科学与工程前沿

CSTPCDEI
影响因子：0.172
ISSN：2095-0179
年,卷(期)：2024.18(2)
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