Highly selective cesium(I) capture under acidic conditions by a layered sulfide

Jun-Hao Tang, Jian-Ce Jin, Wei-An Li, Xi Zeng, Wen Ma, Ji-Long Li, Tian-Tian Lv, Ying-Chen Peng, Mei-Ling Feng () and Xiao-Ying Huang
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Jun-Hao Tang: Chinese Academy of Sciences
Jian-Ce Jin: Chinese Academy of Sciences
Wei-An Li: Chinese Academy of Sciences
Xi Zeng: Chinese Academy of Sciences
Wen Ma: Chinese Academy of Sciences
Ji-Long Li: Chinese Academy of Sciences
Tian-Tian Lv: Chinese Academy of Sciences
Ying-Chen Peng: Chinese Academy of Sciences
Mei-Ling Feng: Chinese Academy of Sciences
Xiao-Ying Huang: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Radiocesium remediation is desirable for ecological protection, human health and sustainable development of nuclear energy. Effective capture of Cs+ from acidic solutions is still challenging, mainly due to the low stability of the adsorbing materials and the competitive adsorption of protons. Herein, the rapid and highly selective capture of Cs+ from strongly acidic solutions is achieved by a robust K+-directed layered metal sulfide KInSnS4 (InSnS-1) that exhibits excellent acid and radiation resistance. InSnS-1 possesses high adsorption capacity for Cs+ and can serve as the stationary phase in ion exchange columns to effectively remove Cs+ from neutral and acidic solutions. The adsorption of Cs+ and H3O+ is monitored by single-crystal structure analysis, and thus the underlying mechanism of selective Cs+ capture from acidic solutions is elucidated at the molecular level.

Date: 2022
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DOI: 10.1038/s41467-022-28217-8

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