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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, 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 an precipitator with polyvinylpyrrolidone (PVP) as an assistant was briefly introduced. The results showed that the colloid silica was surrounded by nano-ceria uniformly for the core-shell composite particles. The was found in the core-shell composite particles. The 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.