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Biological synthesis of platinum nanoparticles using Diopyros kaki leaf extract

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Abstract

The leaf extract of Diopyros kaki was used as a reducing agent in the ecofriendly extracellular synthesis of platinum nanoparticles from an aqueous H2PtCl6·6H2O solution. A greater than 90% conversion of platinum ions to nanoparticles was achieved with a reaction temperature of 95°C and a leaf broth concentration of >10%. A variety of methods was used to characterize the platinum nanoparticles synthesized: inductively coupled plasma spectrometry, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and Fourier-transform infrared spectroscopy (FTIR). The average particle size ranged from 2 to 12 nm depending on the reaction temperature and concentrations of the leaf broth and PtCl6 2−. FTIR analysis suggests that platinum nanoparticle synthesis using Diopyros kaki is not an enzyme-mediated process. This is the first report of platinum nanoparticle synthesis using a plant extract.

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Acknowledgments

This research was financially supported by the Ministry of Knowledge Economy (MKE) and Korea Institute for Advancement in Technology (KIAT) through the Workforce Development Program in Strategic Technology.

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Correspondence to Beom Soo Kim.

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Song, J.Y., Kwon, EY. & Kim, B.S. Biological synthesis of platinum nanoparticles using Diopyros kaki leaf extract. Bioprocess Biosyst Eng 33, 159–164 (2010). https://doi.org/10.1007/s00449-009-0373-2

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  • DOI: https://doi.org/10.1007/s00449-009-0373-2

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