气候变化领域集成服务门户(CCPortal): Tailoring surface wetting states for ultrafast solar-driven water evaporation

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DOI	10.1039/d0ee00399a
	Tailoring surface wetting states for ultrafast solar-driven water evaporation
	Guo Y.; Zhao X.; Zhao F.; Jiao Z.; Zhou X.; Yu G.
发表日期	2020
ISSN	1754-5692
起始页码	2087
结束页码	2095
卷号	13 期号:7
英文摘要	Solar-driven interfacial evaporation has significant potential to improve the energy utilization efficiency and provides a means for sustainable seawater desalination and water purification technologies. Although rational design of evaporative materials and surfaces is essential to the interfacial solar water vaporization process, tailoring the surface wettability states of solar evaporators to accelerate the vapor generation rate remains unexplored. Here we demonstrate hydrophilic hydrogel evaporators with hydrophobic island-shaped patches, capable of achieving a record evaporation rate of ∼4.0 kg m-2 h-1 with 93% efficiency under 1 sun irradiation (1 kW m-2). This exceptional high rate results from both wetting regions, which function synergistically. The increased thickness of the water layer in the hydrophilic region leads to the rapid escape of water molecules, while relatively long contact lines promise considerable water evaporation from the hydrophobic region, further contributing to this process. Molecular dynamics simulations provide a consistent outcome on a molecular basis, in which an inhomogeneous surface wetting property could modulate the escape behavior of water molecules to speed the evaporation. Under natural sunlight, a 3D printed portable solar water purification jug using this hydrogel evaporator delivers purified water far above the EPA drinking water standards, highlighting its potential for water purification. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	3D printers; Desalination; Energy utilization; Evaporators; Hydrogels; Hydrophilicity; Hydrophobicity; Irradiation; Molecular dynamics; Molecules; Potable water; Purification; Water supply; Water treatment plants; Wetting; Drinking water standards; Energy utilization efficiency; Hydrophilic hydrogels; Hydrophilic regions; Molecular dynamics simulations; Seawater desalination; Surface wettability; Water purification technologies; Evaporation; evaporation; solar radiation; surface temperature; wetting
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162481
作者单位	Materials Science and Engineering Program, Department of Mechanical Engineering, University of Texas at AustinTX 78712, United States; State Key Laboratory of Multiphase Flow in Power Engineering, Xi'An Jiaotong University, Xi'an Shaanxi, 710049, China
推荐引用方式 GB/T 7714	Guo Y.,Zhao X.,Zhao F.,et al. Tailoring surface wetting states for ultrafast solar-driven water evaporation[J],2020,13(7).
APA	Guo Y.,Zhao X.,Zhao F.,Jiao Z.,Zhou X.,&Yu G..(2020).Tailoring surface wetting states for ultrafast solar-driven water evaporation.Energy and Environmental Science,13(7).
MLA	Guo Y.,et al."Tailoring surface wetting states for ultrafast solar-driven water evaporation".Energy and Environmental Science 13.7(2020).