Wang Wenqiang, Chen Xi, Zhao Chu, Zhao Bowu, Dong Hualin, Ma Shengkui, Li Liying, Chen Li, Zhang Bin
State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China.
School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
Polymers (Basel). 2018 Jan 10;10(1):59. doi: 10.3390/polym10010059.
A blend of Polyvinylidene Fluoride (PVDF) and SiO₂ microspheres in ,-Dimethylformamide (DMF) underwent phase inversion to form a PVDF/SiO₂ membrane with SiO₂ microspheres in the membrane's pores. Subsequently, the SiO₂ microspheres have been used as platforms for in site Ag nanoparticles (NPs) synthesis, forming a composite membrane. Benefitting from the full exposure of Ag NPs to the reactants, the composite membrane shows high catalytic reactivity when catalyzing the reduction of -nitrophenol under a cross-flow. The catalytic reaction follows the first-order kinetics, and the reaction rate increases with an increase in the amount of Ag NPs in the membrane, the reaction temperature, and the operating pressure. What is more, highly purified products can be produced and separated from the reactants in a timely manner by using the composite membrane.
聚偏氟乙烯（PVDF）和二氧化硅（SiO₂）微球在N，N-二甲基甲酰胺（DMF）中的混合物发生相转化，形成了一种在膜孔中含有SiO₂微球的PVDF/SiO₂膜。随后，SiO₂微球被用作原位合成银纳米颗粒（Ag NPs）的平台，形成了一种复合膜。得益于Ag NPs与反应物的充分接触，该复合膜在错流条件下催化对硝基苯酚还原时表现出高催化活性。催化反应遵循一级动力学，反应速率随膜中Ag NPs含量、反应温度和操作压力的增加而增大。此外，使用该复合膜可以及时生产出高纯度产物并将其与反应物分离。
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