Abstract
Mesoporous SrTiO3 spheres were synthesized via the self-assembly of nanocrystallites in the presence of Na2SiO3·9H2O through a hydrothermal process. The as-prepared samples were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, energy dispersive spectroscopy, thermogravimetric analysis and nitrogen gas sorption isotherms. The results revealed that the mesoporous spheres consisted of SrTiO3 nanocrystallites with an amorphous silicate shell and mesopores formed among them. Na2SiO3·9H2O played an important role in the formation of the mesoporous SrTiO3 spheres. Based on the experimental results a possible formation mechanism of the mesoporous SrTiO3 spheres was preliminarily proposed.
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