Foshan University , 18 Jiangwan 1st Road , Foshan , Guangdong 528000 , P. R. China.
Queen's University , 90 Bader Lane , Kingston , Ontario K7L 3N6 , Canada.
ACS Appl Mater Interfaces. 2019 Feb 20;11(7):7397-7404. doi: 10.1021/acsami.8b20759. Epub 2019 Feb 8.
Hydrophilic Ag nanoparticles were pattern-deposited onto one side of an electrospun poly(vinylidene fluoride) (PVDF) nanofiber mat, yielding a Janus filter. The filter was used to separate a receiver cell from a reactor cell that contained an aqueous 4-nitrophenol/NaBH solution. Upon contact with this solution, the Ag nanoparticles catalyzed the reduction of 4-nitrophenol to 4-aminophenol. After the reaction reached completion, ethyl acetate was added into the reactor to extract the product. During this process, the ethyl acetate containing 4-aminophenol also selectively permeated regions of the hydrophobic yet oleophilic PVDF mat that were not covered by Ag nanoparticles. The product was obtained after the evaporation of ethyl acetate. This paper demonstrates the first use of a Janus filter in a catalytic separatory reactor that catalyzes a chemical reaction and then facilitates the eventual separation of the formed product via filtration.
亲水 Ag 纳米粒子被图案沉积在电纺聚偏二氟乙烯 (PVDF) 纳米纤维垫的一侧，得到了一个 Janus 过滤器。该过滤器用于将含有水相 4-硝基苯酚/NaBH 溶液的接收器与反应器隔开。当与该溶液接触时，Ag 纳米粒子催化了 4-硝基苯酚还原为 4-氨基酚。反应完成后，将乙酸乙酯加入到反应器中以萃取产物。在此过程中，含有 4-氨基酚的乙酸乙酯也选择性地渗透到 Ag 纳米粒子未覆盖的疏油亲油 PVDF 垫的区域。乙酸乙酯蒸发后得到产物。本文首次在催化分离式反应器中使用 Janus 过滤器，该过滤器催化化学反应，然后通过过滤促进形成的产物的最终分离。
