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.
机构:
Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R ChinaZhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Gong, Cheng-tao
Xu, Guo-dong
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Yancheng Teachers Univ, Sch Chem & Environm Engn, Inst New Energy Chem Storage & Power Sources, Yancheng 224007, Jiangsu, Peoples R ChinaZhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Xu, Guo-dong
Chen, Liang-jun
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机构:
Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R ChinaZhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Chen, Liang-jun
Jia, Jian-hong
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机构:
Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R ChinaZhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Jia, Jian-hong
Peng, Yong-wu
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机构:
Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China
Zhejiang Univ Technol, Coll Chem Engn, Hangzhou 310014, Peoples R ChinaZhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Peoples R China