Multiple types of gold nanoparticles maintain a stable form in acidic, basic and neutral conditions, but they have a core-shell structure with an inorganic oxide shell such as titanium dioxide for use as a catalyst in a wider and more diverse field by protecting the surface Particles were synthesized. The nanoparticles having multiple gold cores and titania shells according to the present invention have higher photocatalytic activity due to the combination of gold and titanium dioxide, and thus can be applied to various fields such as environment-friendly devices and decomposition of pollutants.
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