Multi-plateau water adsorption of pyrene-based covalent organic frameworks for potential humidity control

被引:0
|
作者
Liu, Tianyi [1 ]
Cheng, Pengfei [2 ]
Liu, Jiaojiao [1 ]
Yang, Li [1 ]
Li, Zhen [1 ]
Li, Yimeng [3 ]
Deng, Weiqiao [1 ]
机构
[1] Shandong Univ, Inst Frontier Chem, Sch Chem & Chem Engn, 72 Binhai Rd, Qingdao 266237, Shandong, Peoples R China
[2] Chinese Acad Sci, DICP, State Key Lab Mol React Dynam, Dalian 116023, Liaoning, Peoples R China
[3] Qingdao Agr Univ, Coll Chem & Pharmaceut Sci, Qingdao Engn Res Ctr Agr Recycling Econ Mat, Qingdao 266109, Peoples R China
基金
中国国家自然科学基金;
关键词
Covalent organic frameworks; Humidity control; Multi-plateau water adsorption; Structure regulation; TOTAL-ENERGY CALCULATIONS; HEALTH;
D O I
10.1016/j.cej.2024.157851
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Indoor air humidity significantly influences air quality, human health, and work performance. Covalent organic frameworks (COFs) have been proven effective in humidity regulation; however, challenges remain in broadening their range of humidity control. This study designs and synthesizes a series of pyrene-based crystalline COFs as humidity control materials, investigating the moisture adsorption-desorption characteristics under structural modulation. Among these, PY-3,3 '-BPY-COF exhibits unique multi-step adsorption isotherms, achieving the highest water uptake capacity (1 g/g) and efficient water uptake-release cycles. Theoretical and experimental analyses reveal a linear relationship between the maximum water uptake rate and the specific surface area, while the adsorption inflection points are influenced by the water binding energy and pore size distribution. Importantly, the introduction of strong binding sites promotes multi-step adsorption phenomena, significantly enhancing the humidity control capabilities of COFs across a wide range of humidity levels. This research introduces an innovative approach for broad-spectrum indoor humidity control and reveals the fundamental relationship between the structure characteristics of COFs and their capabilities in water adsorption and release.
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页数:8
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