Peng Wanwan, Tian Shuting, Li Shuangshuang, Wu Jingcheng, Wu Daqing, Zhou Peng, Li Hongjie, He Yi, Bai Yang
State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, PR China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China.
State Key Lab of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, PR China; College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500, PR China; Gong County Emergency Management Bureau, Yibin, 644500, PR China.
Environ Res. 2025 Feb 15;267:120660. doi: 10.1016/j.envres.2024.120660. Epub 2024 Dec 17.
Adjusting the structure of the membrane and improving its performance proved to be an effective technique for accomplishing efficient dye wastewater purification. Water erosion of polyvinylpyrrolidone (PVP) core in polyacrylonitrile (PAN) nanofiber membrane modified with UiO-66-NH was successfully achieved, in this study, using coaxial electrospinning, and ZIF-8 with excellent performance was further epitaxy-grown in situ. Two differently shaped and positively charged MOFs confer strong adsorption capacity (adsorption capacity >2042 mg/g) on cationic dyes. In addition, the multi-dimensional separation pores brought by the micro/nano graded porous groove structure and MOFs not only make the membrane have excellent static adsorption performance, but also have excellent dynamic separation performance under the influence of toxic heavy ions (separation efficiency >99 %; Flux >1666 L m h bar). More importantly, this special structure of the membrane has an excellent photocatalytic activity for the dye, so the membrane can be used for a long time in a green and environmentally friendly way. Together, membranes show a significant deal of potential for the treatment of wastewater containing dyes due to the combination of these outstanding characteristics.
调整膜结构并提高其性能被证明是实现高效染料废水净化的有效技术。在本研究中，通过同轴静电纺丝成功实现了用UiO - 66 - NH修饰的聚丙烯腈（PAN）纳米纤维膜中聚乙烯吡咯烷酮（PVP）核的水蚀，并进一步原位外延生长出性能优异的ZIF - 8。两种不同形状且带正电荷的金属有机框架（MOF）赋予了对阳离子染料强大的吸附能力（吸附容量>2042 mg/g）。此外，微/纳米分级多孔槽结构和MOF带来的多维分离孔不仅使膜具有出色的静态吸附性能，而且在有毒重金属离子影响下具有出色的动态分离性能（分离效率>99%；通量>1666 L m h bar）。更重要的是，这种特殊的膜结构对染料具有出色的光催化活性，因此该膜可以以绿色环保的方式长期使用。综上所述，由于这些突出特性的结合，膜在处理含染料废水方面显示出巨大的潜力。
