Floatable, Self-Cleaning, and Carbon-Black-Based Superhydrophobic Gauze for the Solar Evaporation Enhancement at the Air-Water Interface

被引:344
作者
Liu, Yiming [1 ]
Chen, Jingwei [1 ]
Guo, Dawei [1 ]
Cao, Moyuan [1 ]
Jiang, Lei [1 ,2 ]
机构
[1] Beihang Univ, Sch Chem & Environm, Key Lab Bioinspired Smart Interfacial Sci & Techn, Minist Educ, Beijing 100191, Peoples R China
[2] Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, Beijing Natl Lab Mol Sci, Beijing 100080, Peoples R China
关键词
superhydrophobic gauze; air-water interface; solar evaporation; carbon black nanoparticle; self-cleaning; STEAM-GENERATION; WASTE-WATER; SURFACES; TECHNOLOGY; ASCENT; ENERGY; TIO2; BODY; FILM;
D O I
10.1021/acsami.5b03435
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Efficient solar evaporation plays an indispensable role in nature as well as the industry process. However, the traditional evaporation process depends on the total temperature increase of balk water. Recently, localized heating at the air water interface has been demonstrated as a potential strategy for the improvement of solar evaporation. Here, we show that the carbon-black-based superhydrophobic gauze was able to float on the surface of water and selectively heat the surface water under irradiation, resulting in an enhanced evaporation rate. The fabrication process of the superhydrophobic black gauze was low-cost, scalable, and easy-to-prepare. Control experiments were conducted under different light intensities, and the results proved that the floating black gauze achieved an evaporation rate 2-3 times higher than that of the traditional process. A higher temperature of the surface water was observed in the floating gauze group, revealing a main reason for the evaporation enhancement. Furthermore, the self-cleaning ability of the superhydrophobic black gauze enabled a convenient recycling and reusing process toward practical application. The present material may open a new avenue for application of the superhydrophobic substrate and meet extensive requirements in the fields related to solar evaporation.
引用
收藏
页码:13645 / 13652
页数:8
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