Nanostructured CeO2 microspheres synthesized by a novel surfactant-free emulsion

Preparation of Novel Silica Nanoparticle/Polystyrene Composite Microspheres in a Pickering Emulsion

Silica nanoparticle/polyaniline composite microspheres (SPCMs) were synthesized in a Pickering emulsion for the first time. The products were characterized by SEM and FTIR. The SPCMs were consisted of a polystryrene core and a silica nanoparticle shell. The average diameter of the SPCMs was about 3.3 μm. A mechanism for the formation of the SPCMs was discussed. The route reported here may be used for the preparation of other novel composite nanostructures.

Preparation of petaloid microspheres of basic magnesium carbonate

The synthesis of basic magnesium carbonate was examined under ultrasonic irradiation and was performed by the soda ash method using magnesium sulfate and sodium carbonate as starting materials. The particulate product was evaluated using SEM observations. Ultrasonic irradiation in the preparation of basic magnesium carbonate was found to give fine petaloid microspheres of about 3 mum in primary particle size.