Coupling membrane and Fe-Pd bimetallic nanoparticles for trichioroethene removing from water
Coupling membrane and Fe-Pd bimetallic nanoparticles for trichioroethene removing from water
复制标题
耦合膜和铁钯双金属纳米颗粒去除水中三氯乙烯
DOI：
10.1016/j.jiec.2019.06.013
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发表时间：
2019-10-25
影响因子：
6.1
通讯作者：
Chen, Li
中科院分区：
文献类型：
--
作者：
Li, Bangkai;Chen, Xi;Chen, Li
制备了一种新型复合膜，该膜孔负载丙烯酸微凝胶，并包覆Fe-Pd双金属纳米颗粒（NPs），用于水中三氯乙烯（TCE）的脱氯。首先将丙烯酸微凝胶固定在聚偏氟乙烯（PVDF）膜孔中，然后原位合成Fe-Pd双金属纳米颗粒（NPs）制备该膜。Fe-Pd NPs与多孔膜的耦合使脱氯在包括渗透流和切向流的交叉流模型中进行。在该模型中，渗透流体中发生了大量的脱氯，而切向流体中没有发生脱氯。因此，在交叉流脱氯过程中，产物和反应物总是被及时分离。复合膜可以防止Fe-Pd NPs受到污染，因为其纳米级的表面孔隙可以阻止胶体和牛血清白蛋白（BSA）进入膜内部。然而，这些细小的表面孔隙并不能减缓反应物向膜孔的扩散，从而使形成的复合膜在间歇反应中也表现出较快的脱氯速率。综上所述，复合膜TCE脱氯具有脱氯速度快、操作方便、产物与反应物分离及时、金属NPs分离的额外步骤少等优点。(C) 2019韩国工业与工程化学学会。Elsevier B.V.版权所有。
A novel composite membrane with membrane pores loading acrylic acid microgels coated by Fe-Pd bimetallic nanoparticles (NPs) was prepared for the dechlorination of trichioroethene (TCE) in water. This membrane was prepared by firstly immobilizing acrylic acid microgels in poly (vinylidene fluoride) (PVDF) membrane pores and then in-situ synthesis of Fe-Pd bimetallic nanoparticles (NPs). The Fe-Pd NPs coupled with the porous membranes enabled dechlorination to be conducted in a cross-flow model including a penetrative flow and a tangential flow. In such a model, a large number of dechlorination occurred in penetrative flow fluid while no dechlorination occurred in tangential flow fluid. Thus, products and reactants are always timely isolated in the cross-flow dechlorination process. The composite membrane prevents Fe-Pd NPs from contamination because its nanosize surface pores stop colloids and bovine serum albumin (BSA) from entering into the membrane interior. However, these small surfaces pores cannot slow the diffusion of reactants into membrane pores, and thus make the as formed composite membrane also show a fast dechlorination rate in a batch reaction. All in all, TCE dechlorination by the composite membrane shows many advantages including the fast dechlorination rate, the convenient operation, the timely isolation of products from reactants, and the ignorable extra steps for separation of metal NPs. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.