Li Xibiao, Jiang Lan, Li Xiaowei, Qu Liangti, Zhao Yang, Wang Jiaqi, Yi Peng, Li Taoyong, Zhang Xiangyu, Li Jiafang
Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, PR China.
ACS Appl Mater Interfaces. 2024 Nov 6;16(44):60890-60901. doi: 10.1021/acsami.4c08167. Epub 2024 Aug 29.
Solar-driven interface desalination has emerged as a promising strategy to address the global freshwater shortage crisis. However, the separation and recovery of multicomponent oil-contaminated seawater remain a key challenge. This study reports a novel high-strength Janus photothermal membrane with a unique reverse wettability design. On one side, the membrane has hydrophilic and oleophobic properties, while on the other, it has hydrophobic and oleophilic characteristics. The Janus membrane demonstrates dual functionality: solar desalination and oil-water separation. This dual functionality enables efficient separation and recovery of four components from contaminated seawater: purified water, salt crystals, light oil, and heavy oil. As a result, the Janus membrane achieves an evaporation rate of 2.06 kg m h under 1.0 sun. The ion (Na, K, Ca, and Mg) removal rate approaches 100% with nearly complete recovery of salt crystals. Furthermore, various types of oils can be accurately separated, with separation efficiency approaching 100%. An integrated separation device successfully separates and recovers the four components. This research presents significant potential for efficient separation and recovery of complex components in oil-contaminated seawater.
太阳能驱动的界面脱盐已成为应对全球淡水短缺危机的一种有前景的策略。然而，多组分含油海水的分离和回收仍然是一个关键挑战。本研究报道了一种具有独特反润湿性设计的新型高强度Janus光热膜。在膜的一侧，具有亲水性和疏油性，而在另一侧，具有疏水性和亲油性。Janus膜具有双重功能：太阳能脱盐和油水分离。这种双重功能能够从受污染海水中高效分离和回收四种成分：纯净水、盐晶体、轻油和重油。结果，Janus膜在1.0个太阳光照下实现了2.06 kg m⁻² h⁻¹的蒸发速率。离子（Na、K、Ca和Mg）去除率接近100%，盐晶体几乎完全回收。此外，各种类型的油都能被准确分离，分离效率接近100%。一种集成分离装置成功地分离和回收了这四种成分。这项研究在高效分离和回收含油海水中的复杂成分方面具有巨大潜力。
