A Highly Stable Ortho-Ketoenamine Covalent Organic Framework with Balanced Hydrophilic and Hydrophobic Sites for Atmospheric Water Harvesting.
ChemSusChem
; 15(24): e202201824, 2022 Dec 20.
Article
em En
| MEDLINE
| ID: mdl-36215080
ABSTRACT
Atmospheric moisture is a sustainable clean water source that can solve the shortage of fresh water in arid areas. Herein a 2D covalent organic framework (COF-ok) was reported as a promising porous sorbent for solar-driven atmospheric water harvesting. COF-ok with ortho-ketoenamine linkage was extremely stable in harsh environment, including in boiling water, strong acids and bases. Because of the balanced hydrophilic and hydrophobic sites in channels, COF-ok showed a high water uptake of 0.33â
g g-1 at a low relative humidity of 34 % featuring a characteristic S-shaped water sorption isotherm with low regeneration temperature (â¼45 °C) and excellent cyclic stability. A laboratory-scale water harvesting system could collect water of 161â
g kg-1 under sunlight.
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MEDLINE
Assunto principal:
Água
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Estruturas Metalorgânicas
Idioma:
En
Revista:
ChemSusChem
Assunto da revista:
QUIMICA
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TOXICOLOGIA
Ano de publicação:
2022
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Article