Thiostannate coordination transformation-induced self-crosslinking chalcogenide aerogel with local coordination control and effective Cs+ remediation functionality
| Autor: | Kang Min Ok, Jong Kook Won, Yeo Kyung Kang, Myung-Gil Kim, Heehyeon Lee, Byungman Kang, Kyunghan Ahn, Thanh Duy Cam Ha, Youngtak Oh, Hongil Jo, Sangdoo Ahn |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Ligand Chalcogenide Aerogel 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Chalcogel Trigonal bipyramidal molecular geometry Crystallography chemistry.chemical_compound Transition metal Polymerization chemistry Specific surface area General Materials Science 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry A. 8:3468-3480 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/c9ta11282k |
| Popis: | 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 m2 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. |
| Databáze: | OpenAIRE |
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