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Encoding CO2-philic recognition environments in membranes via substitute-template imprinting.
Ziyi Yuan1,2, Lie Liu3, Xinyi Huang1
1Department of Chemical Engineering, Guangdong Technion - Israel Institute of Technology, 241 Daxue Road, Shantou, Guangdong, 515063, China. xuezhong.he@gtiit.edu.cn.
Chemical Communications (Cambridge, England)
|July 8, 2026
Summary
A new molecular imprinting strategy uses oxalic acid as a template to create CO2-selective membranes. This method enhances carbon dioxide affinity and separation performance for gas applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Computational Chemistry
Background:
- Mixed matrix membranes (MMMs) are crucial for gas separation.
- Developing selective membranes for carbon dioxide (CO2) capture remains a challenge.
Purpose of the Study:
- To develop a novel molecular imprinting strategy for CO2-selective MMMs.
- To enhance CO2 affinity and separation performance using a surrogate template approach.
Main Methods:
- Utilized density functional theory (DFT) to guide the imprinting process.
- Employed oxalic acid (OA) as a substitute template to create specific CO2 recognition sites.
- Fabricated and characterized mixed matrix membranes.
Main Results:
- Successfully constructed CO2-selective MMMs via the substitute-template strategy.
- Demonstrated enhanced CO2 affinity and improved separation performance.
- Verified the creation of specific CO2 recognition sites within the membrane matrix.
Conclusions:
- The reported DFT-guided substitute-template molecular imprinting strategy is effective for creating CO2-selective MMMs.
- This approach offers a generalizable route for molecular recognition in gas separation membranes.
- The findings contribute to advancements in carbon capture technologies.
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