Browsing by Author "محمد عبدالله المرعضي"

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Microporous Magnetic Carbon Spheres Functionalized with Metallic Nanoparticles and Their Applications in Heterogeneous Catalysis.
(Saudi Digital Library) محمد عبدالله المرعضي
Inexpensive catalyst support with large surface areas are extremely common in the chemical manufacturing sector. Here, we describe how we used a hydrothermal polymerization method to move glucose carbon spheres in a simple and environmentally friendly way (CSPs). Besides, a hydrothermal method integrated with microwave irradiation technique for the synthesizing of Fe3O4-CSPs core-shell decorated with Pd nanoparticles has been employed. High resolution transmission electron microscope (HRTEM), Field Emission Scanning Electron Microscopy (FESEM), nitrogen isotherms, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), x-ray photoelectron spectroscopy (XPS), and Raman spectroscopy have investigated the prepared composites. The composite is largely spherical, with a core-shell structure, according to the findings. Moreover, the resulting Pd/Fe3O4-CSPs catalyst shows the strong tolerance Suzuki–Miyaura cross-coupling reactions in 30 min at 80oC to various substrate scope of aryl halide with phenylboronic acid. Furthermore, without substantial decrease of performance we were able to reuse the catalyst up to four catalytic cycles. Only this work doesn't demonstrates a simple method for fabricating Pd/Fe3O4-CSPs composites, but also encourages the use of Pd/Fe3O4-CSPs catalysts in organic transformation processes.
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