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- Title
2D Covalent Organic Framework for Water Harvesting with Fast Kinetics and Low Regeneration Temperature.
- Authors
Sun, Chao; Zhu, Yuhao; Shao, Pengpeng; Chen, Liwei; Huang, Xin; Zhao, Shuang; Ma, Dou; Jing, Xuechun; Wang, Bo; Feng, Xiao
- Abstract
Atmospheric water harvesting represents a promising technique to address water stress. Advanced adsorbents have been rationally designed to achieve high water uptake, yet their water sorption kinetics and regeneration temperature greatly limit water production efficiency. Herein, we demonstrated that 2D covalent organic frameworks (COFs), featuring hydrophobic skeleton, proper hydrophilic site density, and 1D open channels significantly lowered the water diffusion and desorption energy barrier. DHTA‐Pa COF showed a high water uptake of 0.48 g/g at 30 % R.H. with a remarkable adsorption rate of 0.72 L/Kg/h (298 K) and a desorption rate of 2.58 L/Kg/h (333 K). Moreover, more than 90 % adsorbed water could be released within 20 min at 313 K. This kinetic performance surpassed the reported porous materials and boosted the efficiency for multiple water extraction cycles. It may shed light on the material design strategy to achieve high daily water production with low‐energy input.
- Subjects
LOW temperatures; POROUS materials; WATER efficiency; SORPTION; DESORPTION
- Publication
Angewandte Chemie, 2023, Vol 135, Issue 11, p1
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202217103