Miao Yiwen, Zhang Chenghao, Sun Ya, Wang Chunlei, Yan Juntao, Deng Sunhua, Chi Ruan
College of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Hong Kong 999077, China.
College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, China.
Polymers (Basel). 2024 Dec 13;16(24):3484. doi: 10.3390/polym16243484.
A series of flexible polyacrylonitrile/TiO (PAN/P25) multi-porous nanotubular membranes were successfully constructed by facile electrospinning combined with an ethylene glycol solvothermal induce strategy. The effects of P25 dosage and solvothermal time on the morphology of samples were systematically investigated, which were characterized in terms of surface morphology, microstructure, specific surface area, thermal analysis, wettability, photoelectrochemical and fluorescence spectra. Rhodamine B (RhB) and () were employed as simulated pollutants to evaluate photocatalytic degradation and antibacterial properties of the PAN/P25-3 multi-porous nanotubular membrane. The PAN/P25-3 membrane exhibited the highest photocatalytic degradation efficiency, with 96.1% degradation of RhB within 120 min under a xenon lamp light source and a photocatalytic inactivation rate of 95.8% for under 365 nm monochromatic light irradiation. The photocatalytic degradation mechanism of the PAN/P25-3 multi-porous nanotubular membrane for RhB was deduced from the results of 3D-EEM fluorescence and scavenger experiments of reactive species. Additionally, the cyclic photodegradation experiments demonstrated that the PAN/P25-3 membrane maintained excellent stability and photocatalytic performance after multiple degradation cycles, confirming its potential for sustainable wastewater treatment applications.
通过简便的静电纺丝结合乙二醇溶剂热诱导策略，成功构建了一系列柔性聚丙烯腈/二氧化钛（PAN/P25）多空纳米管膜。系统研究了P25用量和溶剂热时间对样品形貌的影响，并通过表面形貌、微观结构、比表面积、热分析、润湿性、光电化学和荧光光谱对其进行了表征。采用罗丹明B（RhB）和（此处原文缺失内容）作为模拟污染物，评估PAN/P25-3多空纳米管膜的光催化降解和抗菌性能。PAN/P25-3膜表现出最高的光催化降解效率，在氙灯光源下120分钟内RhB的降解率为96.1%，在365nm单色光照射下对（此处原文缺失内容）的光催化失活率为95.8%。根据三维激发发射矩阵（3D-EEM）荧光结果和活性物种清除剂实验，推导了PAN/P25-3多空纳米管膜对RhB的光催化降解机理。此外，循环光降解实验表明，PAN/P25-3膜在多次降解循环后保持了优异的稳定性和光催化性能，证实了其在可持续废水处理应用中的潜力。
