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首页> 外文会议>Progress in environmental science and technology.;vol. 3. >Catalytic Dechlorination of Monochloroacetic Acid by Film-supported Pd/Fe Bimetallic Nanoparticles
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Catalytic Dechlorination of Monochloroacetic Acid by Film-supported Pd/Fe Bimetallic Nanoparticles

机译：膜载Pd​​ / Fe双金属纳米粒子对一氯乙酸的催化脱氯

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摘要

Three novel kinds of support film, including PVDF-PAA film, PVDF·TiO2-PAA film and PVDF-g-AA film, were synthesized and used to immobilize the Pd/Fe bimetallic nanoparticles (NPs). And PVDF-PAA film and PVDF·TiO2-PAA film were synthesized by using crosslinking reaction between polyacrylic acid (PAA) and ethylene glycol (EG) on the surface of both original and modified Poly(vinylidene fluoride) (PVDF) films, which produced a hydrophilic coating layer with bimetallic NPs on the surface of support films, whereas PVDF-g-AA film was prepared by three steps including alkaline treatment, nucleophilic addition and grafting acrylic acid. After the immobilization of Pd/Fe NPs, the immobilized bimetallic NPs systems were characterized by SEM and Fourier transform infrared spectroscopy (FT-IR). The dechlorination efficiency of the immobilized bimetallic NPs systems were tested and discussed by dechlorinating monochloroacetic acid (MCAA). Comparing with free suspended Pd/Fe NPs, bimetallic NPs with support films appeared better catalytic dechlorination efficiency, and the dechlorination efficiencies of 10 mg/L MCAA in 120 min by Pd/Fe NPs immobilized in PVDF-PAA film, PVDF·TiO2-PAA film and PVDF-g-AA film were 56.33%, 71.01% and 75.51%, respectively.
机译：合成了三种新型的支撑膜，包括PVDF-PAA膜，PVDF·TiO2-PAA膜和PVDF-g-AA膜，并用于固定Pd / Fe双金属纳米颗粒（NPs）。利用聚丙烯酸（偏二氟乙烯）膜和改性聚偏二氟乙烯（PVDF）膜表面的聚丙烯酸（PAA）和乙二醇（EG）之间的交联反应，合成了PVDF-PAA膜和PVDF·TiO2-PAA膜。在支撑膜表面上具有双金属NPs的亲水涂层，而PVDF-g-AA膜则通过碱处理，亲核加成和丙烯酸接枝三步制备。固定化Pd / Fe NPs后，通过SEM和傅立叶变换红外光谱（FT-IR）对固定化的双金属NPs系统进行了表征。通过对一氯乙酸（MCAA）进行脱氯测试并讨论了固定化双金属NPs系统的脱氯效率。与自由悬浮的Pd / Fe NPs相比，带有支持膜的双金属NPs表现出更好的催化脱氯效率，并且固定在PVDF-PAA膜PVDF·TiO2-PAA中的Pd / Fe NPs在120分钟内的脱氯效率为10 mg / L MCAA。膜和PVDF-g-AA膜分别为56.33％，71.01％和75.51％。

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