通过涂敷法、共混法和化学接枝法制备了PVDF-PAA膜、PVDF·TiO2-PAA膜和PVDF-g-AA膜3种新型载体膜,分别负载纳米钯/铁双金属颗粒后对一氯乙酸进行还原脱氯实验并通过SEM以及红外吸收光谱(FT-IR)对3个体系进行表征.结果发现,与传统的Pd/Fe纳米悬浮颗粒体系相比,膜载纳米双金属颗粒体系的脱氯效率更高,并且PVDF-PAA膜、PVDF·TiO2-PAA膜和PVDF-g-AA膜3种膜负载的纳米钯/铁双金属颗粒在120 min内对10 mg/L的一氯乙酸的脱氯效率分别是:56.33％、71.01％和75.51％.%Three kinds of support films,including PVDF-PAA film,PVDF · TiO2PAA film and PVDF-g-AA film,were synthesized by coating method,blending method and chemical grafting method,and used to immobilize the Pd/Fe bimetallic nanoparticles (NPs).The dechlorination of monochloroacetic acid by film-immobilized bimetallic NPs systems were characterized by SEM and Fourier Transform Infrared Spectroscopy (FTIR).Comparing with free suspended Pd/Fe NPs,bimetallic NPs with support films appeared better dechlorination efficiency,and the dechlorination efficiencies of 10mg/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.
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