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Vascular-Mimetic 2D Membranes with Hemoglobin Catalysis for Efficient Uranium Extraction
Siqi Han1,2, Wenbin Liang1,2, Hongyan Wan1,2
1MOE Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou, 730000, China.
Advanced Materials (Deerfield Beach, Fla.)
|September 12, 2025
Summary
Researchers developed a novel bioinspired membrane using graphene oxide and red blood cells for highly selective uranium extraction from seawater. This energy-efficient method mimics vascular transport, overcoming challenges of low concentration and competing ions for sustainable nuclear energy.
Area of Science:
- Materials Science
- Biomimetic Engineering
- Environmental Chemistry
Background:
- Uranium extraction from seawater is vital for nuclear energy but faces challenges like low concentrations and competing ions.
- Conventional methods are energy-intensive and lack selectivity.
- Existing membranes struggle with efficient and selective uranium capture.
Purpose of the Study:
- To develop a highly selective and energy-efficient membrane for uranium extraction from seawater.
- To mimic natural vascular transport for improved ion separation.
- To create a scalable solution for resource recovery.
Main Methods:
- Fabrication of a bioinspired graphene oxide-red blood cell (GO-RBC) membrane.
- Utilizing GO-induced remodeling of red blood cells and hemoglobin (Hb) adsorption.
- Designing an "island-reef" structure within membrane channels for controlled ion transport.
Main Results:
- Achieved unprecedented U/V selectivity (110.6) through biomimetic design.
- Demonstrated enhanced ion interaction via S-shaped pathways and Hb catalytic reduction of U(VI) to U(IV).
- Exhibited exceptional antifouling properties, mechanical robustness, and long-term stability.
Conclusions:
- The GO-RBC membrane offers a scalable and energy-efficient solution for uranium extraction from seawater.
- This biomimetic approach significantly outperforms current technologies in selectivity and efficiency.
- Opens new avenues for developing advanced membranes for resource recovery.
