Abstract
An innovative matrix composed of a poly(vinylidene fluoride) (PVDF) membrane modified by adding alumina (Al 2O 3) nanoparticles was prepared. Pd/Fe nanoparticles (NPs) were successfully immobilized in the PVDF·Al 2O 3 membrane, which was initially crosslinked by polyacrylic acid (PAA). The PVDF·Al 2O 3 membrane and the Pd/Fe NPs immobilized in PVDF·Al 2O 3 were characterized by scanning electronic microscope (SEM), energy dispersive spectrometry (EDS) and Fourier transform infrared spectroscopy (FT-IR). Studies showed that the amount of Fe immobilized in the PVDF·Al 2O 3 membrane was four times more than the amount in a traditional PVDF membrane carrier of the same surface size. Pd/Fe NPs immobilized in PVDF·Al 2O 3 exhibited high efficiency and stability in terms of dechlorination of monochloroacetic acid (MCAA). The effects of several important experimental parameters, including the added Al 2O 3 amount in PVDF, ferrous concentration in crosslinking solution and Pd content in Pd/Fe NPs were investigated. The reasons behind the improved properties of the PVDF·Al 2O 3 membrane were discussed.
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