Catalysis of the hydro-dechlorination of 4-chlorophenol and the reduction of 4-nitrophenol by Pd/Fe3O4@C
Palladium nanoparticles (NPs) have been applied to hydrodechlorination of chlorophenols in contaminated water by using H2 as a clean and sustainable reductant. In this study, a high-efficiency Pd-based catalyst (Pd/Fe3O4@C) has been facilely synthesized and applied to the reduction of 4-nitrophenol and the hydrodechlorination of 4-chlorophenol in aqueous solution. Compared with most Pd based catalysts, Pd/Fe3O4@C nanocatalyst can exhibit higher catalytic performance. The well-dispersed Pd NPs are modified on sphere surface brought through strong chemical bond which can efficiently reduce the shedding of NPs. The superparamagnetic character of Fe3O4 core enables Pd/Fe3O4@C nanocatalyst to be separated and recovered from the reaction mixture much more easily. Thus, the nanocatalysts can be used repeatedly without a significant weight loss. The high catalytic activity of Pd/Fe3O4@C nanocatalyst indicates that the noble metal nanoparticles supported on magnetic carbon sphere materials could act as a promising catalyst and exhibits potential applications in numerous Pd based catalytic reactions.