School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; College of Textiles and Clothing, Qingdao University, Qingdao 266071, China.
School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Int J Biol Macromol. 2023 Dec 31;253(Pt 5):127205. doi: 10.1016/j.ijbiomac.2023.127205. Epub 2023 Oct 5.
Membrane separation is considered an effective approach to water purification. Nevertheless, membrane fouling dramatically decreases the separation efficiency and lifetime of membranes, thus limiting its further development and application. Herein, a multifunctional self-cleaning MIL-88A(Fe) decorated polyvinyl alcohol/sodium alginate (MIL-88A(Fe)@PVA-SA) nanofiber membrane was prepared by electrospinning and in-situ growth methods for the separation of oil/water emulsions and photo-Fenton degradation of dyes. The membrane possesses superhydrophilicity with a water contact angle (WCA) of 0° and superoleophobicity with underwater oil contact angle (UCA) of 161.7°, and exhibits superior separation efficiency (>99.5 %) and permeation flux (1140-2455 L/m/h) for different oil/water emulsions. Moreover, the membrane exhibited an outstanding photo-Fenton performance under visible light, with degradation efficiencies (~99.9 %) towards methylene blue (MB) and reactive red 24 (RR24) within 90 min. Importantly, the membrane can be easily regenerated by simple rinsing and photo-Fenton self-cleaning treatment. In this study, MIL-88A(Fe)@PVA-SA nanofiber membrane has a promising application in dye removal and oil/water separation, providing a new idea to develop novel membrane materials.
膜分离被认为是一种有效的水净化方法。然而，膜污染会显著降低膜的分离效率和寿命，从而限制了其进一步的发展和应用。在此，通过静电纺丝和原位生长方法制备了一种多功能自清洁 MIL-88A(Fe) 修饰的聚乙烯醇/海藻酸钠（MIL-88A(Fe)@PVA-SA）纳米纤维膜，用于油水乳液的分离和光芬顿降解染料。该膜具有超亲水性，水接触角（WCA）为 0°，水下油接触角（UCA）为 161.7°，具有超疏油性，对不同的油水乳液表现出优异的分离效率（>99.5%）和渗透通量（1140-2455 L/m/h）。此外，该膜在可见光下表现出出色的光芬顿性能，在 90 分钟内对亚甲基蓝（MB）和活性红 24（RR24）的降解效率达到~99.9%。重要的是，该膜可以通过简单的冲洗和光芬顿自清洁处理轻松再生。在这项研究中，MIL-88A(Fe)@PVA-SA 纳米纤维膜在染料去除和油水分离方面具有广阔的应用前景，为开发新型膜材料提供了新的思路。
