Preparation of Hollow Fe3O4/Pd@C NCs to stabilize subminiature Pd nanoparticles for reduction of 4-nitrophenol
NEW JOURNAL OF CHEMISTRY(2020)
摘要
N-Doped hollow Fe3O4/Pd@C nanocontainer (NC) composites, involving the loading of magnetic Fe3O4 and subminiature noble metal Pd nanoparticles (NPs), were prepared. The synthetic process involves the decomposition of Fe3O4/Pd2+@ZIF-8 and the polymerization of dopamine simultaneously via a "Chelation Competition Induced Polymerization" process, forming hollow polymer NCs. Then, they were carbonized into Fe3O4/Pd@C NCs. The structure and composition of the as-prepared nanocontainers were characterized. The catalytic performance of the Fe3O4/Pd@C NC composites was studied by the reduction of 4-nitrophenol with NaBH4 as a reducing agent. The reaction rate constant was calculated according to the pseudo-first-order reaction equation. It was found that subminiature Pd NPs were obtained, and the coordination interaction between Pd and N in PDA prevented Pd NPs from aggregating during high-temperature calcination, resulting in a high k value. Besides the good catalytic properties, high stability of Fe3O4/Pd@C NCs was also confirmed.
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关键词
subminiature fe<sub>3</sub>o<sub>4</sub>/pd@c nanoparticles,reduction
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