科研之友
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摘要
We report a new photochemical method for tuning the shapes of gold nanoparticles inside nanocavity of mesoporous silica shells (mHSS) using Ag+ ions without using any convential organic capping ligands. mHSS acts as a nanocontainer and is used for entrapping the chloroauric acid molecules along with Ag+ ions. The shape of gold nanoparticles is tuned from spheres to triangular nanoplates inside mHSS by varying the molar ratio of [AuCl4-]/[Ag+] in the reaction. The results confirm that the presence of Ag+ ions promotes the growth of Au triangular nanoplates inside mHSS. The Au triangular nanoplates demonstrate superior catalytic activity than spherical Au nanoparticles.
- 出版日期2017-5-4
