One-pot synthesis of highly porous nitrogen and oxygen codoped carbons for solar-driven atmosphere water harvesting

被引:5
作者
Hu, Yue [1 ,2 ]
Fang, Zhou [1 ,2 ]
Yao, Bing [1 ,2 ]
Ye, Zhizhen [1 ,2 ]
Peng, Xinsheng [1 ,2 ]
机构
[1] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat & Adv Semicond Mat, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Inst Wenzhou, Wenzhou Key Lab Novel Optoelect & Nanomat, Wenzhou 325006, Peoples R China
关键词
Activated porous carbon sorbents; N and O codoped atmosphere water harvesting; Fast solar-driven desorption; Heterogeneity; Hierarchical porous structure; METAL-ORGANIC FRAMEWORKS; ADSORPTION; HYDROPHILICITY; GROWTH;
D O I
10.1016/j.apmt.2024.102121
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
There is significant interest in developing high-performance adsorbents that can harvest water from atmospheric air powered by sunlight. However, The inherent hydrophobicity of porous carbon limits water harvesting capacity. Herein, we report a new class of activated porous carbons (PAK-21) with high water adsorption capacity at moderate to high humidity by solid-phase polymerization of terephthalaldehyde and 2,6-diaminopurine in the presence of KOH under an argon atmosphere at 150 degrees C for 2 h, and then activated at a high temperature of 700 degrees C for 1 h. The water harvesting performance surpasses the most common MOFs and porous carbon adsorbents, which benefit from rich surface heterogeneity and highly porous structure. PAK-21 also exhibits fast solar-driven desorption kinetics, ascribing to rapid photothermal responsiveness, hierarchical porosity, and suitable hydrophilicity. Besides, twenty-one adsorption-desorption cycles have been performed to demonstrate its easy regeneration and long-term cyclability. This may pave a new way to modulate the surface functionality and microporous/mesoporous engineering of carbon adsorbents for high-performance solar-driven AWH.
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页数:8
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