In this study, TiO2 was successfully coated on Stober silica beads followed by depositing Au nanoparticles on this core-shell structure. The size of the Au nanoparticles was well controlled in the range of 2 - 7 nm. This composite exhibited high thermal stability. When used as a model catalyst for oxidation of CO at low temperatures, the Au/TiO2/SiO2 showed a much higher catalytic activity than the Au/SiO2 and Au/TiO2(P25) catalysts.
|Number of pages||4|
|Journal||Key Engineering Materials|
|State||Published - 2007|
- CO oxidation
- Nano-sized Au particles
- SiO(core)-TiO(shell) structure