Thiostannate coordination transformation-induced self-crosslinking chalcogenide aerogel with local coordination control and effective Cs+ remediation functionality
- Authors
- Kang, Yeo Kyung; Lee, Heehyeon; Ha, Thanh Duy Cam; Won, Jong Kook; Jo, Hongil; Ok, Kang Min; Ahn, Sangdoo; Kang, Byungman; Ahn, Kyunghan; Oh, Youngtak; Kim, Myung-Gil
- Issue Date
- 2020-02-14
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.8, no.6, pp.3468 - 3480
- Abstract
- Thiostannate ammonium chalcogenide aerogel (TAC) is synthesized through a unique self-crosslinking polymerization reaction between tetrahedral thiostannate dimer clusters ([Sn2S6](4-)) and various ammonium ligands (NR4+). TAC is a unique and rare chalcogenide aerogel (so called "chalcogel") stabilized without using a cationic transition metal center. In-depth and synergistic structural analyses reveal that after the self-condensation reaction, the thiostannate clusters are stabilized into a three-dimensional solid network with the support of an ammonium spacer. Consequently, thiostannate coordination is successfully transformed from tetrahedral to a distorted trigonal bipyramidal geometry, yielding a [Sn3S7](2-) cluster-based porous chalcogenide network. This organic/inorganic heterostructure has a large specific surface area (158-363 m(2) g(-1)), macroscopically random orientation of pores, soft basicity, controllable hosting ammonium ligand, and rapid mass transport through multiscale channels. These characteristics enable remarkable radionuclide control functionality such as large Cs+ adsorption capacity (141-220 mg g(-1)), high selectivity towards cations with intermediate chemical hardness (e.g., Cs+), structural integrity over a wide pH range (2-8), and rapid ion uptake (50% in 30 min and complete equilibrium within 3 h). This study demonstrates that the self-crosslinking mechanism of chalcometallate clusters can be utilized as a diverse platform to synthesize a broad range of chalcogenide heterostructures with desirable functionalities.
- Keywords
- HIGHLY EFFICIENT; ION-EXCHANGE; SPECTROSCOPIC PROPERTIES; METAL CHALCOGENIDES; SELECTIVE REMOVAL; CESIUM ADSORPTION; AQUEOUS-SOLUTIONS; SULFIDE; OXIDE; WATER; HIGHLY EFFICIENT; ION-EXCHANGE; SPECTROSCOPIC PROPERTIES; METAL CHALCOGENIDES; SELECTIVE REMOVAL; CESIUM ADSORPTION; AQUEOUS-SOLUTIONS; SULFIDE; OXIDE; WATER
- ISSN
- 2050-7488
- URI
- https://pubs.kist.re.kr/handle/201004/118959
- DOI
- 10.1039/c9ta11282k
- Appears in Collections:
- KIST Article > 2020
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