Preparation and Characterization of Core-Shell γ-Fe2O3@SiO2@ Al2O3 Magnetic Catalyst

Abstract:

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Magnetic catalyst was made of magnetic core and surface coating layer and obtained a core-shell complex materials. The magnetic γ-Fe2O3 core has a relatively higher saturation magnetization, coercivity and good thermal stability even at 500°C. In order to prevent magnetic core forming spinel structure and migrating of Fe3+, a layer of silicon dioxide was coated by sol-gel method. During the process iron atoms scattered in –Si-O-Si- network and produced a γ-Fe2O3@SiO2 structure. Finally, the γ-Fe2O3@SiO2 powder was put into the alumina sol and evenly sprayed into a column of oil, after calcination the carrier of alumina layer was prepared.

Info:

Periodical:

Edited by:

Rongming Wang, Ying Wu and Xiaofeng Wu

Pages:

223-227

DOI:

10.4028/www.scientific.net/MSF.688.223

Citation:

L. Q. Yu et al., "Preparation and Characterization of Core-Shell γ-Fe2O3@SiO2@ Al2O3 Magnetic Catalyst", Materials Science Forum, Vol. 688, pp. 223-227, 2011

Online since:

June 2011

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Price:

$35.00

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