One-pot pathway: Fabricating ordered hollow silica spheres using sodium silicate as the precursor

Weiwei Wu, Xinhua Yuan, Shunsheng Cao*, Yi Ge, Songjun Li, Zhiyuan Zhao, Long Fang

*Corresponding author for this work

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The preparation of hollow silica spheres via the sodium silicate route presents many advantages such as a low-cost silica source, and an environmentally friendly reaction system. Unfortunately, it is extremely hard to prepare the well-defined hollow silica spheres by using sodium silicate as the silica source owing to its rapid, disordered precipitation under the acid catalysis. As a result, we, in this paper, report a facile, economic, one-pot pathway for preparation of the ordered hollow silica spheres by employing a sodium silicate precursor. In this approach, the cationic polystyrene (CPS) templates can be first prepared via emulsifier-free emulsion polymerization by using the cationic monomer vinylbenzyltrimethylammonium chloride, then, the silica shells were attached on the surfaces of CPS particles via electrostatic interaction, finally CPS particles were in situ dissolved and removed by adding toluene to create ordered hollow silica spheres. Some modern techniques and instruments, including the transmission electron microscope, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, and Brunauer-Emmett-Teller theory were employed to monitor and characterize the resulting hollow silica spheres.

Original languageEnglish
Pages (from-to)1541-1546
Number of pages6
JournalAustralian Journal of Chemistry
Volume64
Issue number12
DOIs
Publication statusPublished - 2011
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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