Lin Yinghao, Xie Atian, Xu Jian, Xue Changguo, Cui Jiuyun, Pan Jianming
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
Membranes (Basel). 2023 May 15;13(5):514. doi: 10.3390/membranes13050514.
Oil pollution caused by a large number of industrial activities and oil spill accidents has posed serious harm to the environment and human health. However, some challenges remain with the existing separation materials, such as poor stability and fouling resistance. Herein, a TiO/SiO fiber membrane (TSFM) was prepared by a one-step hydrothermal method for oil-water separation in acid, alkali, and salt environments. The TiO nanoparticles were successfully grown on the fiber surface, endowing the membrane with superhydrophilicity/underwater superoleophobicity. The as-prepared TSFM exhibits high separation efficiency (above 98%) and separation fluxes (3016.38-3263.45 L·m·h) for various oil-water mixtures. Importantly, the membrane shows good corrosion resistance in acid, alkaline, and salt solutions and still maintains underwater superoleophobicity and high separation performance. The TSFM displays good performance after repeated separation, demonstrating its excellent antifouling ability. Importantly, the pollutants on the membrane surface can be effectively degraded under light radiation to restore its underwater superoleophobicity, showing the unique self-cleaning ability of the membrane. In view of its good self-cleaning ability and environmental stability, the membrane can be used for wastewater treatment and oil spill recovery and has a broad application prospect in water treatment in complex environments.
大量工业活动和石油泄漏事故造成的油污对环境和人类健康构成了严重危害。然而，现有的分离材料仍存在一些挑战，如稳定性差和抗污染性不足。在此，通过一步水热法制备了一种TiO/SiO纤维膜（TSFM），用于在酸、碱和盐环境中进行油水分离。TiO纳米颗粒成功生长在纤维表面，赋予膜超亲水性/水下超疏油性。所制备的TSFM对各种油水混合物表现出高分离效率（高于98%）和分离通量（3016.38-3263.45 L·m·h）。重要的是，该膜在酸、碱和盐溶液中表现出良好的耐腐蚀性，仍保持水下超疏油性和高分离性能。TSFM在重复分离后表现出良好的性能，证明了其优异的抗污染能力。重要的是，膜表面的污染物在光辐射下可有效降解，恢复其水下超疏油性，显示出膜独特的自清洁能力。鉴于其良好的自清洁能力和环境稳定性，该膜可用于废水处理和溢油回收，在复杂环境中的水处理方面具有广阔的应用前景。
