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

被引：9
作者：
Ding, Xiaofan [1 ]
Zhang, Zhanjun [2 ]
Li, Xinyan [1 ]
Ma, Ke [1 ]
Jin, Tiantian [1 ]
Feng, Zhaoning [1 ]
Lan, Tian [1 ]
Zhao, Jing [1 ]
Xiao, Songtao [1 ]
机构：
[1] China Inst Atom Energy, Beijing, Peoples R China
[2] Beijing Univ Chem Technol, Coll Chem Engn, Beijing, Peoples R China
来源：
ENVIRONMENTAL SCIENCE-NANO | 2024年 / 11卷 / 05期
关键词：
REMOVAL; U(VI);
D O I：
10.1039/d4en00076e
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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 beta-ray resistance with Al-MOF was confirmed by XRD and FT-IR characterization as well as adsorption isotherm experiments under beta-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 x 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. Al-MOF synthesized based on MOF irradiation stability rules exhibits high stability against beta-irradiation and ultra-high thorium adsorption capacity, which proves its huge potential application value in the field of radionuclide adsorption.
引用
收藏
页码：2103 / 2111
页数：9
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