Synthesis of colloid silica coated with ceria nano-particles with the assistance of PVP

In this paper, a facile synthesis of 100 nm commercial colloid silica coated with nano-ceria core–shell composite particles by the precipitation method using ammonium cerium nitrate and urea as a precipitator with polyvinylpyrrolidone (PVP) as an assistant was briefly introduced. The results showed that the colloid silica was surrounded by nano-ceria uniformly forming the core–shell composite particles. The synthesis process was further discussed and optimized. It was found that the type and quantity of surfactant played a key role in the process. PVP connected the surface of colloid silica and that of the ceria precursor.

In this paper, composite particles with 100 nm colloid silica as the core and nano-sized ceria particles on the surface were synthesized with the assistance of PVP. The synthesis process was further explored, it was found that surfactant PVP which combined silica and ceria through hydrogen bond played the most important role in the process.Figure optionsDownload as PowerPoint slide