Issue 10, 2012

Hydrothermal synthesis, characterization and formation mechanism of self-assembled mesoporous SrTiO3 spheres assisted with Na2SiO3·9H2O

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.

Graphical abstract: Hydrothermal synthesis, characterization and formation mechanism of self-assembled mesoporous SrTiO3 spheres assisted with Na2SiO3·9H2O

Article information

Article type
Paper
Submitted
10 Dec 2011
Accepted
05 Mar 2012
First published
06 Mar 2012

CrystEngComm, 2012,14, 3702-3707

Hydrothermal synthesis, characterization and formation mechanism of self-assembled mesoporous SrTiO3 spheres assisted with Na2SiO3·9H2O

Y. Zhang, G. Xu, X. Wei, Z. Ren, Y. Liu, G. Shen and G. Han, CrystEngComm, 2012, 14, 3702 DOI: 10.1039/C2CE06655F

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