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 °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.
| Original language | English |
|---|---|
| Article number | 1802767 |
| Number of pages | 8 |
| Journal | Advanced Materials |
| Volume | 30 |
| Issue number | 34 |
| DOIs | |
| Publication status | Published - 23 Aug 2018 |
Keywords
- Amphoteric
- Desalination
- Metal-organic frameworks
- Regenerable salt adsorbents
- Thermoresponsive
Cite this
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Thermoresponsive Amphoteric Metal-Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water. / Ou, Ranwen; Zhang, Huacheng; Wei, Jing; Kim, Seungju; Wan, Li; Nguyen, Nhi Sa; Hu, Yaoxin; Zhang, Xiwang; Simon, George P.; Wang, Huanting.
In: Advanced Materials, Vol. 30, No. 34, 1802767, 23.08.2018.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Thermoresponsive Amphoteric Metal-Organic Frameworks for Efficient and Reversible Adsorption of Multiple Salts from Water
AU - Ou, Ranwen
AU - Zhang, Huacheng
AU - Wei, Jing
AU - Kim, Seungju
AU - Wan, Li
AU - Nguyen, Nhi Sa
AU - Hu, Yaoxin
AU - Zhang, Xiwang
AU - Simon, George P.
AU - Wang, Huanting
PY - 2018/8/23
Y1 - 2018/8/23
N2 - 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 °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.
AB - 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 °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.
KW - Amphoteric
KW - Desalination
KW - Metal-organic frameworks
KW - Regenerable salt adsorbents
KW - Thermoresponsive
UR - http://www.scopus.com/inward/record.url?scp=85050367877&partnerID=8YFLogxK
U2 - 10.1002/adma.201802767
DO - 10.1002/adma.201802767
M3 - Article
VL - 30
JO - Advanced Materials
JF - Advanced Materials
SN - 0935-9648
IS - 34
M1 - 1802767
ER -