材料科学
海水淡化
光热治疗
异质结
纳米技术
膜
吸收(声学)
光电子学
能量转换效率
复合材料
化学
生物化学
作者
Chenyang Cai,Yongqin Wang,Zechang Wei,Yu Fu
出处
期刊:Solar RRL
[Wiley]
日期:2021-10-04
卷期号:5 (11): 2100593-2100593
被引量:27
标识
DOI:10.1002/solr.202100593
摘要
2D MXene materials have shown great potential in photothermal conversion, especially for solar steam generation. However, the obvious light losses at the liquid−solid interfaces still limit its broad applications, thereby resulting in a poor light absorption ability. To this end, a facile and general approach is designed for the construction of nanoflower MXene@MoS2 with excellent photothermal conversion ability via one-step hydrothermal process. Thanks to the multireflective and synergestic effects between MXene and MoS2, the hierarchical MXene@MoS2 heterostructure exhibits broadband light absorption and improved photothermal conversion capacity (69 °C after 10 min solar illumination). Furthermore, inspired by the water vapor process in multiple channels of trees, an ultrathin MXene@MoS2-based nanofibrous membrane is assembled via directional electrospinning technology. Compared with traditional irregular channels, the controllable and tree-inspired 3D structure shows competitive advantages in solar absorption and water transport. Thus, the as-prepared self-floating membrane presents durable hydrophobicity (contact angle [CA] = 125°) and a high evaporation rate of 1.39 kg/(m2h) (91% efficiency) under 1 sun, which is higher than reported. This 3D MXene-based device also shows promising electrical generation, solar-driven sewage, and desalination treatments (99% desalination efficiency). Such high-performance self-floating photothermal membranes with multifunctionalities might provide an effective strategy for solving the global problems of freshwater shortage.
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