Bioinspired design of electrospun nanofiber based aerogel for efficient and cost-effective solar vapor generation

被引:65
|
作者
Liu, Ye [1 ]
Liu, Huijie [1 ]
Xiong, Jian [1 ]
Li, Ailin [1 ]
Wang, Rongwu [1 ]
Wang, Liming [1 ]
Qin, Xiaohong [1 ]
Yu, Jianyong [2 ]
机构
[1] Donghua Univ, Coll Text, Key Lab Text Sci & Technol Minist Educ, Shanghai 201620, Peoples R China
[2] Donghua Univ, Innovat Ctr Text Sci & Technol, Shanghai 201620, Peoples R China
基金
中国国家自然科学基金;
关键词
Solar vapor generation; Electrospinning; Bioinspired design; Nanofiber; Aerogel; HIGHLY EFFICIENT; STEAM-GENERATION; MEMBRANE; EVAPORATION; GRAPHENE;
D O I
10.1016/j.cej.2021.131539
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Electrospun nanofiber based aerogels are attracting great attention for solar vapor generation due to their unique three-dimensional (3D) porous structure, light weight, enhanced solar absorption and thermal insulation property. However, the commonly used sophisticated and expensive preparation process, as well as the relatively low solar vapor generation performance, have limited their wide applications. Herein, luffa-inspired electrospun polyacrylonitrile/carbon nanotubes (PAN/CNTs) nanofiber based aerogels with hierarchical pore structure were designed and fabricated in an eco-friendly crosslinking and simple freeze-drying method. The nanofiber based aerogel combined the synergistic photothermal effect of polydopamine (PDA) and CNTs, resulting in a high light absorption of 94.8%. Furthermore, the 3D interconnected structure formed by the electrospun nanofibers greatly reduced the enthalpy of vaporization. The composite aerogel achieved fast evaporation rate of 2.13 kg m-2 h-1 and high solar-vapor conversion efficiency of 94.5% under one sun, superior to most of the reported electrospun nanofiber based solar vapor generators. This scalable, eco-friendly and cost-effective aerogel provides a straightforward approach for producing clean water efficiently.
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页数:9
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