Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8021329 | Materials Letters | 2013 | 5 Pages |
Abstract
Fe3O4/SiO2 nanocomposite particles were synthesized from a hydrophobic Fe3O4 suspension, prepared by precipitating Fe (II) and Fe (III) chlorides and using a hydrophobic SiO2 wet gel from a silicic acid solution derived from a sodium silicate (water glass) solution. Fe3O4 nanoparticles having a crystallite size of ~10Â nm embedded in SiO2 aerogel can be successfully fabricated by mixing the Fe3O4 suspension and silica wet gel in n-hexane. It was clearly observed that the Fe3O4 nanoparticles were well crystallized and homogeneously dispersed in the SiO2 aerogel. The Fe3O4/SiO2 nanocomposite particles exhibited superparamagentic behavior. The saturation magnetization was determined to 34.5, 18.2, and 8.3Â emu/g for 90Â wt% Fe3O4, 70Â wt% Fe3O4, and 50Â wt% Fe3O4/SiO2 nanocomposite particles, respectively.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Jun Sung Lee, Sun Ki Hong, Nam Jung Hur, Won-Seon Seo, Hae Jin Hwang,