Preparation of magnetite nanoparticles coated with silica via a sol-gel approach

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

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Silica-coated magnetite nanoparticles were synthesized via sol-gel process, which comprises the hydrolysis and condensation of TEOS in ethanol/water solution with NH3 aq. as catalyst. Transmission electron microscope and vibrating sample magnetometer was applied to characterize the nanocomposite particles. Results reveal that the reaction parameters including volume ratio of alcohol/water, the concentrations of NH3 aq and TEOS play important roles of the formation of silica shell. The thickness of silica shell increased with TEOS concentration. The nanocomposite particles remained favorable superparamagnetism. The formation of silica shell mainly came from the aggregative growth of silica primary particles on the surface of magnetite nanoparticles.

本文言語English
ページ(範囲)877-881
ページ数5
ジャーナルJournal of the Ceramic Society of Japan
115
1348
DOI
出版ステータスPublished - 2007 12

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学

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