Issue 19, 2023

A 3D hierarchical porous adsorbent constructed by cryo-polymerization for ultrafast uranium harvesting from seawater

Abstract

Large-scale and rapid extraction of uranium from seawater are promising for overcoming the challenge of supply interruption to achieve sustainable nuclear energy production. However, existing uranium adsorbents are limited by bacterial contamination or low seawater flux for long-term operation. Inspired by the efficient nutrient absorption by animal small intestine folds, we have developed a continuous 3D intestine-fold-like hierarchical porous uranium adsorbent using a one-step cryo-polymerization technique. It shows 10 times higher uranium adsorption capacity than the same material without the intestine-fold-like structure. The continuous supermacro pores (10–100 μm) in the adsorbent provide rapid flow channels for seawater; the micropores (∼1 μm) in the pore walls provide a Schiff base and amidoxime sites for efficient uranium capture. Its functional and high-strength double network polymer chains show a compressive strength of 1.4–3.3 MPa. Within a period of seven days in natural seawater, the uranium adsorption rate was as high as 0.97 mg (g d)−1. The presence of an antibacterial Schiff base allows the adsorbent to achieve a uranium adsorption amount of 10.45 ± 0.46 mg g−1 after 30 days in natural seawater. Importantly, the cryo-polymerization technique proposed in this work simultaneously achieves the formation of hierarchical pores and is easily scalable for large-area preparation, providing a reliable adsorbent for seawater uranium extraction and contributing to the sustainable development of nuclear energy.

Graphical abstract: A 3D hierarchical porous adsorbent constructed by cryo-polymerization for ultrafast uranium harvesting from seawater

Supplementary files

Article information

Article type
Paper
Submitted
28 Feb 2023
Accepted
14 Apr 2023
First published
20 Apr 2023

J. Mater. Chem. A, 2023,11, 10384-10395

A 3D hierarchical porous adsorbent constructed by cryo-polymerization for ultrafast uranium harvesting from seawater

D. Li, Y. Liao, Z. Chen, X. Chang, X. Zhang, C. Chen, C. Cui, Z. Zhang, C. Muhire, W. Tang, D. Zhang, J. Li and X. Xu, J. Mater. Chem. A, 2023, 11, 10384 DOI: 10.1039/D3TA01235B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements