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A facile method to prepare copper nanoparticles by UV-irradiating a sample containing a radical photoinitiator
and a copper-amine coordination compound of copper chloride is reported. In the absence of any inert gas
protection, the copper-amine coordination compound was reduced directly to copper particles by UVirradiation. Poly vinylpyrrolidone (PVP) and pyrrole both were used as capping agents. Sodium ascorbate
plays a role as an antioxidant for colloidal copper, due to its ability to scavenge free radicals and reactive
oxygen molecules, and therefore helps in stabilizing the copper nanoparticles for few minutes in open air.
Dynamic light scattering (DLS) results showed that copper nanoparticles formed in the presence of (PVP) were
narrower, along with the narrowing of size distribution as compared to those in the presence of other
stabilizers. Evaluation of the irradiation process was conducted by UV–vis spectroscopy using model systems
for copper particles obtained in a solvent and also when the solvent was substituted by acrylic monomer.
Presence of stabilizers tends to increase the resistance of copper nanoparticles formed in acrylic monomer
against oxidation in an open atmosphere.
Rabia Nazar. (2017) INSITU PHOTOSYNTHESIS AND STABILIZATION OF COPPER NANOPARTICLES, Pakistan Journal of Engineering and Applied Sciences, VOLUME 21, Issue 1.
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