Preparation of core-shell SiO2/Fe3O4 nanocomposite particles by reverse microemulsion

Bing Liu, Deping Wang, Aihua Yao, Wenhai Huang, Masanobu Kamitakahara, Koji Ioku

研究成果: Article査読

4 被引用数 (Scopus)


Core-shell structural SiO2/Fe3O4 nanocomposite particles were prepared via hydrolysis and condensation of tetraethyl orthosilicate (TEOS) by using Fe3O4 nanoparticles as seeds in a Triton X-100/hexanol/cyclohexane/water reverse microemulsion system. The effects of the mass concentration of Fe3O4, the mole ratio of water to Triton X-100 (ω0) and the mass concentrations of NH4OH and TEOS on SiO2/Fe3O4, nanocomposite particles were investigated. The results show that mass concentration of Fe3O4 has an effect on the core number and appearance of the nanocomposite particles. The mass concentrations of NH4OH and ω0 are the main factors of the SiO2 heterogeneously growing on the Fe3O4 nuclei surface. The SiO2 shell becomes thicker and the particle morphology becomes more uniform with the increase of TEOS mass concentration. The saturation magnetization of the nanocomposite particles decrease with the increase in the thickness of the silica shell, the coercive force of the nanocomposite particles is almost unchanged, and remained favorable to superparamagnetism.

ジャーナルKuei Suan Jen Hsueh Pao/ Journal of the Chinese Ceramic Society
出版ステータスPublished - 2008 4月

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 無機化学
  • 材料化学


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