Design and supported gold nanoparticles over the modified magnetic iron oxide nanoparticles as an effective nanocatalyst for Suzuki-Miyaura reactions

In this study, a magnetic nanomaterial called Fe₃O₄/Si@CHA-Au NPs was made by creating Fe₃O₄ nanoparticles that were covered with a layer of silica and chitosan layers, and finally, included Au nanoparticles to use as the active sites for catalysis. This final material is a strong, magnetically reusable nanocatalyst that works really well. Various advanced methods like TEM, FE-SEM, EDX-Mapping, ICP-OES, and VSM were used to confirm the successful synthesis and structure of the material. The fabricated material was used in the Suzuki-Miyaura process to form carbon-carbon bonds. The Fe₃O₄/Si@CHA-Au NPs showed excellent catalytic efficiency, generating great outcomes with various aromatic halides. Moreover, the catalyst was able to be reused multiple times, continuing to work well even after being used 6 times. A hot filtration test showed that the catalyst worked heterogeneously without loss of material during the reactions.