Issue 5, 2024

Highly radiation-resistant Al-MOF selected based on the radiation stability rules of metal–organic frameworks with ultra-high thorium ion adsorption capacity

Abstract

For the new generation of thorium-based molten salt reactors to operate in the future, irreversible adsorption of radioactive thorium ions is required. Therefore, designing highly irradiation-resistant, high-adsorption capacity porous adsorbents for the adsorptive removal of radioactive thorium ions is a great challenge. Herein, based on the radiation stability rules of MOFs (Al3+ metal nodes and unmodified organic ligands), we used a simple solvothermal method to synthesize an aluminum-based MOF, Al-MOF. The strong β-ray resistance with Al-MOF was confirmed by XRD and FT-IR characterization as well as adsorption isotherm experiments under β-ray irradiation with a total dose of 1000 kGy. Additionally, Al-MOF exhibits ultra-high Th(IV) adsorption capacity (1324.64 mg g−1) and Th(IV) adsorption selectivity (KThd/KMd ≥ 6 × 103). This study provides guidance for the design of efficient MOF-based adsorbents for applications in spent fuel reprocessing and further expands the practical application of MOFs.

Graphical abstract: Highly radiation-resistant Al-MOF selected based on the radiation stability rules of metal–organic frameworks with ultra-high thorium ion adsorption capacity

Supplementary files

Article information

Article type
Paper
Submitted
28 Jan 2024
Accepted
18 Mar 2024
First published
19 Mar 2024

Environ. Sci.: Nano, 2024,11, 2103-2111

Highly radiation-resistant Al-MOF selected based on the radiation stability rules of metal–organic frameworks with ultra-high thorium ion adsorption capacity

X. Ding, Z. Zhang, X. Li, K. Ma, T. Jin, Z. Feng, T. Lan, J. Zhao and S. Xiao, Environ. Sci.: Nano, 2024, 11, 2103 DOI: 10.1039/D4EN00076E

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