Green Synthesis of Gold Nanoparticles

Green Synthesis of Gold Nanoparticles

Author: ChemViews

A simple, green, one-pot synthesis of gold nanoparticles (AuNPs) was achieved by Kurt E. Geckeler, Gwangju Institute of Science and Technology (GIST), and Thathan Premkumar, World-Class University (WCU), Gwangju, South Korea, through the reaction of an aqueous mixture of potassium tetrachloroaurate(III) and the macrocycle cucurbit[7]uril in the presence of sodium hydroxide at room temperature without introducing any kind of traditional reducing agents and/or external energy.

The as-prepared gold nanoparticles showed catalytic activity for the reduction reaction of 4-nitrophenol in the presence of NaBH4, which has been established by visual inspection and UV/Vis spectroscopy.

Surprisingly, the macrocycle can play a dual role in the synthesis of AuNPs: as a reducing agent as well as being a protecting agent.

This report is the first for the preparation of gold nanoparticles using cucurbit[7]uril in aqueous media through chemical reduction without employing conventional reducing agents and/or external energy.

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