| Summary: | 碩士 === 國立中正大學 === 化學暨生物化學研究所 === 106 === Due to their high surface area, the nanomaterials have good performance in catalysis. Many catalysts have recently been reported with nanoscale. Palladium is a catalyst for many reactions. There is a trend to improve the catalyst to make it more convenient to use.
In this study, we have employed Co2(CO)8 and Pd(acac)2 as metallic precursors, and oleylamine and dodecylamine as solvents, and
tri-n-octylphosphine as a surfactant. By changing the proportion of metal precursors, proportion of the surfactant and the reaction temperature; we successfully prepared two different sizes (8.6 nm and 18.5 nm) CoPd magnetic particles. The maximum TOF for the Suzuki coupling reaction at 20 minutes were 418 and 2816, respectively.
The nanoparticles were characterized by transmission electron microscopy (TEM) to analyze the morphology. We analyzed the structures and contents of CoPd magnetic nanoparticles by energy dispersive X-ray spectroscopy (EDS), powder X-ray diffraction (XRD) and flame atomic absorption spectroscopy (FAAS). In addition, we measured the saturation magnetization and coercivity by vibration sample magnetpmeter (VSM). We used gas chromatography to quantify the performance of the catalyst in the Suzuki coupling raction.
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