| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 594777 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2011 | 9 Pages |
Silica hollow microspheres with an eccentric interior and varied porous shell structures, including mesoporous, macroporous and monoporous shells, were prepared by a simple and efficient precipitation-phase separation method. We found that the morphology, size and porous shell structures of the silica hollow microspheres depended strongly on process parameters such as the amount of ammonia, the ratio of TEOS/polystyrene and the organic solvent. The prepared silica hollow microspheres were characterized by scanning electron microscopy, transmission electron microscopy, nitrogen adsorption–desorption measurements and thermogravimetric analysis. Based on our results, we propose a possible formation mechanism of the hollow and eccentric structure.
Graphical abstractSchematic representation of hollow silica microspheres with various pores structure prepared by precipitation-phase separation method and corresponding SEM imagesFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A novel preparation strategy of hollow silica microsheres was reported. ► Hollow silica microspheres with mesoporous, macroporous and monoporous shells were obtained. ► Microspheres structure were dependent on amount of ammonia, ratio of TEOS/polystyrene and organic solvent.
