Cross-Flow Catalysis Behavior of a PVDF/SiO2@Ag Nanoparticles Composite Membrane
Cross-Flow Catalysis Behavior of a PVDF/SiO2@Ag Nanoparticles Composite Membrane
复制标题
DOI：
10.3390/polym10010059
复制
发表时间：
2018-01
期刊：
影响因子：
5
通讯作者：
Wenqian Wang;Xi Chen;Chu Zhao;Bowu Zhao;H. Dong;Shengkui Ma;Liying Li;Li Chen;Bin Zhang
中科院分区：
文献类型：
--
作者：
Wenqian Wang;Xi Chen;Chu Zhao;Bowu Zhao;H. Dong;Shengkui Ma;Liying Li;Li Chen;Bin Zhang
将聚偏氟乙烯（PVDF）和SiO2微球在N，N-二甲基甲酰胺（DMF）中共混，通过相转化制备了PVDF/SiO2膜，SiO2微球存在于膜孔中。随后，SiO2微球已被用作在现场银纳米粒子（NPs）合成的平台，形成复合膜。得益于Ag纳米粒子对反应物的充分暴露，该复合膜在错流下催化对硝基苯酚还原时显示出高的催化活性。催化反应遵循一级动力学，反应速率随着膜中Ag NPs的量、反应温度和操作压力的增加而增加。此外，通过使用该复合膜，可以生产高纯度的产物并及时从反应物中分离。
A blend of Polyvinylidene Fluoride (PVDF) and SiO2 microspheres in N,N-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 p-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.