“…The reaction products were extracted with hexanes, dried with magnesium sulfate, and then put on a rotary evaporator to remove excess solvent. The dried solid product was dissolved in methanol and analyzed by GasChromatography-Mass Spectrometry (GC-MS), as previously reported [34].…”
Composite materials are of interest because they can potentially combine the properties of their respective components in a manner that is useful for specific applications. Here, we report on the use of coffee as a low-cost, green reductant for the room temperature formation of catalytically active, supported metal nanoparticles. Specifically, we have leveraged the reduction potential of coffee in order to grow Pd and Ag nanoparticles at the surface of porous carbon microspheres synthesized via ultraspray pyrolysis. The metal nanoparticle-on-carbon microsphere composites were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). To demonstrate the catalytic activity of Pd/C and Ag/C materials, Suzuki coupling reactions and nitroaromatic reduction reactions were employed, respectively.3
“…The reaction products were extracted with hexanes, dried with magnesium sulfate, and then put on a rotary evaporator to remove excess solvent. The dried solid product was dissolved in methanol and analyzed by GasChromatography-Mass Spectrometry (GC-MS), as previously reported [34].…”
Composite materials are of interest because they can potentially combine the properties of their respective components in a manner that is useful for specific applications. Here, we report on the use of coffee as a low-cost, green reductant for the room temperature formation of catalytically active, supported metal nanoparticles. Specifically, we have leveraged the reduction potential of coffee in order to grow Pd and Ag nanoparticles at the surface of porous carbon microspheres synthesized via ultraspray pyrolysis. The metal nanoparticle-on-carbon microsphere composites were characterized using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and thermal gravimetric analysis (TGA). To demonstrate the catalytic activity of Pd/C and Ag/C materials, Suzuki coupling reactions and nitroaromatic reduction reactions were employed, respectively.3
“…Dioxane was dried with sodium/benzophenone and distilled. Pd(PCy 3 ) 2 Cl 2 [16], diarylborinic acids [10c] and sodium tetraarylborates [17] were prepared according to previously reported procedures. Column chromatograph was performed on 200e300 mesh silica gal.…”
A novel Merrifield resin immobilized phenanthrolinepalladium(II) complex has been developed and was found to be an efficient catalyst for Suzuki-Miyaura cross-coupling reaction between arylboronic acids and a range of aryl halides under mild reaction conditions. The catalyst exhibited both high catalytic activity and stability for Suzuki-Miyaura reaction. Furthermore, the catalyst could be recycled at least 10 times without a significant loss of catalytic activity.
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