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

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

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)877-881
Number of pages5
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume115
Issue number1348
Publication statusPublished - 2007 Dec
Externally publishedYes

Fingerprint

Magnetite Nanoparticles
Magnetite nanoparticles
Silicon Dioxide
magnetite
Sol-gels
Silica
gels
silicon dioxide
nanoparticles
preparation
Nanocomposites
nanocomposites
Superparamagnetism
Water
Magnetometers
sol-gel processes
magnetometers
Sol-gel process
water
hydrolysis

Keywords

  • Magnetite
  • Nanoparticle
  • Sol-gel

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Preparation of magnetite nanoparticles coated with silica via a sol-gel approach. / Liu, Bing; Wang, Deping; Huang, Wenhai; Yao, Aihua; Kamitakahara, Masanobu; Ioku, Koji.

In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan, Vol. 115, No. 1348, 12.2007, p. 877-881.

Research output: Contribution to journalArticle

Liu, Bing ; Wang, Deping ; Huang, Wenhai ; Yao, Aihua ; Kamitakahara, Masanobu ; Ioku, Koji. / Preparation of magnetite nanoparticles coated with silica via a sol-gel approach. In: Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan. 2007 ; Vol. 115, No. 1348. pp. 877-881.
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