Journal
INORGANIC AND NANO-METAL CHEMISTRY
Volume 51, Issue 10, Pages 1418-1430Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/24701556.2020.1837162
Keywords
Metallic copper nanoparticles; chemical reduction; sodium hypophosphite; capping agent; solvent type
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This investigation reports a simple, controllable, chemical reduction method for the formation of copper nanoparticles by reducing copper sulfate with sodium hypophosphite in ethylene glycol using different capping agents: sodium dodecyl sulfate (SDS), polyethylene glycol 2000 (PEG2000), and polyethylene glycol 4000 (PEG4000). The synthetic parameters influencing the purity, size, and morphology of the copper nanoparticles such as reaction time, reaction temperature, reaction solvent, initial copper sulfate concentration, and capping agent were investigated. The products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). The results revealed that pure copper nanoparticles with an average crystallite size of 28 nm were successfully prepared in the presence of PEG4000 capping agent, at 70 degrees C, and in 45 min. The formation mechanism of the as-prepared Cu nanoparticles was also proposed.
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