Synthesis, characterization and catalytic performance of core‐shell structure magnetic Fe3O4/P(GMA‐EGDMA)‐NH2/HPG‐COOH‐Pd catalyst
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Abstract
A strategy has been developed for the synthesis, characterization and catalysis of magnetic Fe 3 O 4 /P(GMA‐EGDMA)‐NH 2 /HPG‐COOH‐Pd core‐shell structure supported catalyst. The P(GMA‐EGDMA) polymer layer was coated on the surface of hollow magnetic Fe 3 O 4 microspheres through the effect of KH570. The core‐shell magnetic Fe 3 O 4 /P(GMA‐EGDMA) modified by ‐NH 2 could be grafted with HPG. Then, the hyperbranched glycidyl (HPG) with terminal ‐OH were modified by ‐COOH and adsorbed Pd nanoparticles. The hyperbranched polymer layer not only protected the Fe 3 O 4 magnetic core from acid–base substrate corrosion, but also provided a number of functional groups as binding sites for Pd nanoparticles. The prepared catalyst was characterized by UV–vis, TEM, SEM, FTIR, TGA, ICP‐OES, BET, XRD, DLS and VSM. The catalytic tests showed that the magnetic Fe 3 O 4 /P(GMA‐EGDMA)‐NH 2 /HPG‐COOH‐Pd catalyst had excellent catalytic performance and retained 86% catalytic efficiency after 8 consecutive cycles.
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