A Highly Stable Ortho-Ketoenamine Covalent Organic Framework with Balanced Hydrophilic and Hydrophobic Sites for Atmospheric Water Harvesting

被引：33

作者：

Chen, Liang-Hui ^{[1
]}

Han, Wang-Kang ^{[1
]}

Yan, Xiaodong ^{[1
]}

Zhang, Jiangwei ^{[2
]}

Jiang, Yuqin ^{[3
]}

Gu, Zhi-Guo ^{[1
]}

机构：

[1] Jiangnan Univ, Sch Chem & Mat Engn, Key Lab Synthet & Biol Colloids, Minist Educ, Wuxi 214122, Jiangsu, Peoples R China

[2] Inner Mongolia Univ, Coll Chem & Chem Engn, Hohhot 010021, Peoples R China

[3] Henan Normal Univ, Henan Engn Res Ctr Chiral Hydroxyl Pharmaceut, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

来源：

CHEMSUSCHEM | 2022年 / 15卷 / 24期

基金：

中国国家自然科学基金;

关键词：

atmospheric water harvesting; balanced hydrophilic sites; balanced hydrophobic sites; covalent organic frameworks; ortho-ketoenamine linked; ADSORPTION; DEVICE;

D O I：

10.1002/cssc.202201824

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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 0.33 g g(-1) at a low relative humidity of 34 % featuring a characteristic S-shaped water sorption isotherm with low regeneration temperature (similar to 45 degrees C) and excellent cyclic stability. A laboratory-scale water harvesting system could collect water of 161 g kg(-1) under sunlight.

引用

页数：7

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