Abstract
Removal of 137 Cs + , one of the most hazardous radionuclides, from nuclear waste, is a challenging task because it requires simultaneously high capacity and high selectivity. Chalcogenides offer a great opportunity to design and create high-performance 137 Cs + absorbents. We report a new material (InSnOS) with facile ion-exchange properties. The anionic framework is based on corner-shared pseudo-T4 supertetrahedral oxysulfide [In 8 Sn 12 O 10 S 34 ] 16- clusters, resulting in the formula [In 8 Sn 12 O 10 S 32 ] 12- . The crystal structure features the interpenetration of two independent oxysulfide cluster frameworks which create pincer cavities based on sulfur atoms that prove highly effective for capturing Cs + ions. The binding mode of the Cs + ions by the material was determined by a single crystal structure refinement of a fully ion-exchanged single crystal. The structure determinations show that the small pores created by the two interpenetrating frameworks are the optimal size for capturing Cs + . This advantage makes the material very effective for the removal and recovery of 137 Cs + from aqueous solution. This framework shows not only extremely high exchange capacity (q m ), 537.7 mg per g of anionic [In 8 Sn 12 O 10 S 32 ] 12- framework, ranking it among the best reported Cs + sorbents, but also superior affinity and selectivity when using complex solutions simulating industrial and nuclear waste conditions.
Original language | English (US) |
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Pages (from-to) | 1628-1634 |
Number of pages | 7 |
Journal | Chemistry of Materials |
Volume | 31 |
Issue number | 5 |
DOIs | |
State | Published - Mar 12 2019 |
Funding
This work is supported by the National Science Foundation (Grant DMR-1708254), the NSFC (51762039 and 21871167), 1331 project, National Plan for 10 000 Talents in China, and 2017XS03.
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
- Materials Chemistry
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CSD 1825665: Experimental Crystal Structure Determination
Wang, L. (Creator), Pei, H. (Creator), Sarma, D. (Creator), Zhang, X.-M. (Creator), MacRenaris, K. (Creator), Malliakas, C. D. (Creator) & Kanatzidis, M. G. (Creator), FIZ Karlsruhe – Leibniz Institute for Information Infrastructure, 2019
DOI: 10.25505/fiz.icsd.cc1z8rff, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc1z8rff&sid=DataCite
Dataset
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CSD 1825667: Experimental Crystal Structure Determination
Wang, L. (Creator), Pei, H. (Creator), Sarma, D. (Creator), Zhang, X.-M. (Creator), MacRenaris, K. (Creator), Malliakas, C. D. (Creator) & Kanatzidis, M. G. (Creator), FIZ Karlsruhe – Leibniz Institute for Information Infrastructure, 2019
DOI: 10.25505/fiz.icsd.cc1z8rhh, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc1z8rhh&sid=DataCite
Dataset
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CSD 1825666: Experimental Crystal Structure Determination
Wang, L. (Creator), Pei, H. (Creator), Sarma, D. (Creator), Zhang, X.-M. (Creator), MacRenaris, K. (Creator), Malliakas, C. D. (Creator) & Kanatzidis, M. G. (Creator), FIZ Karlsruhe – Leibniz Institute for Information Infrastructure, 2019
DOI: 10.25505/fiz.icsd.cc1z8rgg, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.25505/fiz.icsd.cc1z8rgg&sid=DataCite
Dataset