Abstract
Coating of -Fe2O3 nanoparticles with SiO2 layer by wet chemical synthesis and its
applications to protein separation and purification were investigated. The average particle size of
-Fe2O3 core was 20 nm and SiO2 layer thickness was 5 nm. The band of OH- radicals on SiO2 layer
was detected between 3600 and 3200 cm-1 in wave numbers, which showed that the surface property
of coated nanoparticles was similar to that of conventional fumed silica. Finally, the feasibility of
-Fe2O3/SiO2 nanoparticles for magnetic separation media in various bio processes was discussed in
terms of structural and functional properties such as pore structure and magnetic properties.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
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