Laser vaporization and controlled condensation(LVCC)of graphene supported Pd/Fe3O4 nanoparticles as an efficient magnetic catalysts for Suzuki Cross-Coupling

摘要

Herein,a reproducible,reliable,and efficient method was reported for the synthesis of palladium nanoparticles dispersed on a composite of Fe3O4 and graphene(Pd-Fe3O4/G)as a highly efficient active catalyst for being used in Suzuki cross-coupling reactions.Graphene supported Pd/Fe3O4.nanoparticles(Pd-Fe3O4/G)exhibit a remarkable catalytic performance towards Suzuki coupling reactions.Moreover,the prepared catalyst could be recycled for up to three times with high catalytic activity.The catalyst was prepared using LVCC synthesis;;the prepared catalyst is highly magnetic which provides a platform to facilitate the separation process of the catalyst through applying an external magnetic field using a magnet.This adopted approach has several advantages including recyclability.mild reaction conditions,and reproducibility.The high catalytic activity is due to the catalyst-support strong interaction.Moreover,the defect sites found on reduced GO nanosheets act as nucleation centers providing a platform to anchor Pd and Fe3O4 nanoparticles and hence avoid the potential agglomeration and subsequently the anticipated decrease in the catalyst catalytic activity as a direct impact for this unfavorable agglomeration.