Preparation method of nano-gold particle

Abstract

A process for preparing the gold nanoparticles features that the chlorauric acid or gold chloride is added to the alkaline aqueous solution of nitromethane to obtain the aqueous sol of gold nanoparticles. Its advantages are adjustable granularity, high speed and low cost.

Description

technical field [0001] The invention relates to a preparation method of gold nanoparticles. Background technique [0002] Gold nanoparticles have important applications in many fields such as catalysis, electronic and optical devices, and biotechnology. Taking the field of catalysis as an example, gold does not have high activity as a catalyst, but when the size of gold particles is less than 10nm, its catalytic activity is surprisingly improved, showing extremely high catalytic performance for many oxidation and reduction reactions. For example, α-Fe 2 o 3 or TiO 2 Oxidation of CO to CO by supported nano-gold catalysts 2 This important reaction has extremely high catalytic activity and can completely oxidize CO at -70 °C. [0003] Although there have been many reports on the preparation methods of gold nanoparticles, these methods generally require the use of a large amount of polymers or special chemical reagents (such as long-chain thiols or long-chain amines) as pro...

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Problems solved by technology

[0003] Although there have been many reports on the preparation methods of gold nanoparticles, these methods generally require the use of a large amount of polymers or special chemical reagents (such as long-chain thiols or long-chain amines) as protective agents, and some use more expensive reducing agent (such as sodium borohydride), and most of the preparation process requires more steps

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