用于在较弱阳光下实现高产率太阳能蒸汽产生的纳米受限水分子通道
Nanoconfined Water-Molecule Channels for High-Yield Solar Vapor Generation under Weaker Sunlight.
作者信息
Lu Qichen, Shi Wenxiong, Yang Haozhou, Wang Xun
机构信息
Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, China.
School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin, 300387, P. R. China.
出版信息
Adv Mater. 2020 Oct;32(42):e2001544. doi: 10.1002/adma.202001544. Epub 2020 Sep 16.
Solar vapor generation is a promising method to efficiently produce fresh water. However, the insufficient vapor yields under natural daylight restrict its practical applications, and the basic evaporation mechanisms are deficient for reasonable design of evaporator structure. Here, hydrophobic nano-confined water molecule channels (NCWMCs) are demonstrated, which can reduce the vaporization enthalpy for water evaporation and achieve a record vapor generation rate of 1.25 kg m h under 0.5 sun irradiation. Molecular dynamics simulations reveal the cluster-evaporation process in the NCWMC system. As a result, the evaporator with NCWMC system can effectively purify seawater and wastewater samples using this environmentally friendly strategy.
太阳能蒸汽发生是一种高效生产淡水的有前景的方法。然而，自然日光下蒸汽产量不足限制了其实际应用，并且基本蒸发机制对于蒸发器结构的合理设计存在欠缺。在此，展示了疏水性纳米受限水分子通道（NCWMCs），其可降低水蒸发的汽化焓，并在0.5个太阳辐射强度下实现了创纪录的1.25 kg m⁻² h⁻¹的蒸汽产生速率。分子动力学模拟揭示了NCWMC系统中的团簇蒸发过程。结果，具有NCWMC系统的蒸发器可使用这种环保策略有效净化海水和废水样本。
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