摘要
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120min内对10mg/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.
出处
《环境保护科学》
CAS
2013年第3期1-4,24,共5页
Environmental Protection Science
基金
国家自然科学基金资助项目(50978066)
