Wang Hongyu, Wang Chaohai, Qi Junwen, Yan Yubo, Zhang Ming, Yan Xin, Sun Xiuyun, Wang Lianjun, Li Jiansheng
Key Laboratory of New Membrane Materials, Ministry of Industry and Information Technology, Nanjing University of Science & Technology, Nanjing 210094, China.
Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science & Technology, Nanjing 210094, China.
Nanomaterials (Basel). 2019 Mar 10;9(3):402. doi: 10.3390/nano9030402.
Prussian blue and its analogues (PBA) based nanomaterials have been widely applied to removing pollutants in the recent years. However, easy aggregation and poor recycling largely limit their practical applications. In this work, spiderweb-like Fe-Co Prussian blue analogue/polyacrylonitrile (FCPBA/PAN) nanofibers were prepared by electrospinning and applied to degrading bisphenol-A (BPA) by activating peroxymonosulfate (PMS). Detailed characterization demonstrated that a high loading of FCPBA (86% of FCPBA in FCPBA/PAN) was successfully fixed on the PAN nanofibers. 67% of BPA was removed within 240 min when 500 mg·L PMS and 233 mg·L FCPBA/PAN were introduced in 20 mg·L BPA solution at initial pH of 2.8. Electron paramagnetic resonance (EPR) and radical inhibition experiments were performed to identify the possible degradation mechanism. For comparison, a low loading of FCPBA nanofibers (0.6FCPBA/PAN nanofibers, 43% of FCPBA in FCPBA/PAN) were also prepared and tested the catalytic performance. The results showed that the activity of FCPBA/PAN was much higher than 0.6FCPBA/PAN. Furthermore, a FCPBA/PAN packed column was made as a reactor to demonstrate the reusability and stability of FCPBA/PAN nanofibers, which also exhibited the bright future for the industrial application. This work makes it possible to fabricate efficient PBA nanocatalysts with excellent recyclability and promotes the application of PBA in industrial areas.
近年来，基于普鲁士蓝及其类似物（PBA）的纳米材料已被广泛应用于去除污染物。然而，容易聚集和回收性差在很大程度上限制了它们的实际应用。在这项工作中，通过静电纺丝制备了蜘蛛网状的铁 - 钴普鲁士蓝类似物/聚丙烯腈（FCPBA/PAN）纳米纤维，并将其应用于通过活化过一硫酸盐（PMS）来降解双酚A（BPA）。详细表征表明，高负载量的FCPBA（FCPBA/PAN中FCPBA占86%）成功地固定在PAN纳米纤维上。在初始pH为2.8的20 mg·L BPA溶液中引入500 mg·L PMS和233 mg·L FCPBA/PAN时，240分钟内67%的BPA被去除。进行了电子顺磁共振（EPR）和自由基抑制实验以确定可能的降解机制。为了进行比较，还制备了低负载量的FCPBA纳米纤维（0.6FCPBA/PAN纳米纤维，FCPBA/PAN中FCPBA占43%）并测试了其催化性能。结果表明，FCPBA/PAN的活性远高于0.6FCPBA/PAN。此外，制作了一个FCPBA/PAN填充柱作为反应器来证明FCPBA/PAN纳米纤维的可重复使用性和稳定性，这也展示了其在工业应用中的光明前景。这项工作使得制造具有优异可回收性的高效PBA纳米催化剂成为可能，并促进了PBA在工业领域的应用。
