Simultaneous solar-driven seawater desalination and continuous oil recovery
Simultaneous solar-driven seawater desalination and continuous oil recovery
复制标题
同步太阳能驱动海水淡化和连续采油
DOI：
10.1016/j.nanoen.2022.108160
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发表时间：
2023
期刊：
影响因子：
17.6
通讯作者：
Xiong, Guoping
中科院分区：
文献类型：
--
作者：
Wu, Shiwen;Jian, Ruda;Tian, Siyu;Zhou, Long;Luo, Tengfei;Xiong, Guoping
石油泄漏和淡水短缺仍然是两个全球性的挑战性问题。人们正在努力从油/水混合物中回收石油或从丰富的海水中提取淡水。然而，目前几乎所有的装置都集中在单独的石油回收或海水淡化，这是缺乏能源效率。在此，我们提出了一种机械坚固的双功能石墨烯器件（BGD）的设计，该器件包含装饰在倒U形石墨烯整料上的垂直石墨烯片，以实现同时太阳能驱动的蒸汽产生和从石油污染的海水中连续采油。受益于BGD独特的润湿性设计，水在亲水表面蒸发，同时油可以通过疏水/亲油内部通道由于虹吸作用而自发回收。此外，垂直石墨烯的强光热效应可以提高海水淡化和石油回收性能。结果，在1个太阳照射下，同时实现了2.04 kg m-2 h-1的蒸汽发生率和105.8 L m-2 h-1的油回收率。双功能装置的设计为多功能实际环境工程应用提供了最大限度地利用太阳能并降低成本的新手段。
Oil spills and freshwater scarcity remain two worldwide challenging issues. Emerging efforts have been made either to recover oil from oil/water mixture or to extract freshwater from abundant seawater. However, almost all current devices focus on oil recovery or seawater desalination separately, which is lack of energy efficiency. Herein, we propose a design of mechanically robust, bi-functional graphene devices (BGDs), containing vertical graphene sheets decorated on inverted U-shaped graphene monoliths, to achieve simultaneous solar-driven vapor generation and continuous oil recovery from oil-contaminated seawater. Benefiting from the unique wettability design of the BGDs, water evaporates on the hydrophilic surfaces, and meanwhile oil can be spontaneously recovered through the hydrophobic/oleophilic interior channels due to siphon action. Moreover, the strong photothermal effect of vertical graphene can boost both the seawater desalination and oil recovery performance. As a result, a vapor generation rate of 2.04 kg m−2h−1and an oil recovery rate of 105.8 L m−2h−1are concurrently achieved under 1-sun irradiation. The design of bi-functional devices provides a new means to maximize the utilization of solar power and reduce the costs for multi-functional practical environmental engineering applications.