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Thermoresponsive Amphoteric Metal–Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water

Title
Thermoresponsive Amphoteric Metal–Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water
Author
김승주
Keywords
amphoteric; desalination; metal-organic frameworks; regenerable salt adsorbents; thermoresponsive
Issue Date
2018-07
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED MATERIALS, v. 30, no. 34, Article no. 1802767
Abstract
Regenerable, high-efficiency salt sorption materials are highly desirable for water treatment. Here, a thermoresponsive, amphoteric metal-organic framework (MOF) material is reported that can adsorb multiple salts from saline water at room temperature and effectively release the adsorbed salts into water at elevated temperature (e.g., 80 degrees C). The amphoteric MOF, integrated with both cation-binding carboxylic groups and anion-binding tertiary amine groups, is synthesized by introducing a polymer with tertiary amine groups into the cavities of a water-stable MOF such as MIL-121 with carboxylic groups inside its frameworks. The amphoterized MIL-121 exhibits excellent salt adsorption properties, showing stable adsorption-desorption cycling performances and high LiCl, NaCl, MgCl2, and CaCl2 adsorption capacities of 0.56, 0.92, 0.25, and 0.39 mmol g(-1), respectively. This work provides a novel, effective strategy for synthesizing new-generation, environmental-friendly, and responsive salt adsorption materials for efficient water desalination and purification.
URI
https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201802767http://repository.hanyang.ac.kr/handle/20.500.11754/119392
ISSN
0935-9648; 1521-4095
DOI
10.1002/adma.201802767
Appears in Collections:
CENTER FOR CREATIVE CONVERGENCE EDUCATION[S](창의융합교육원) > ETC
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