Nano Archive

Sonochemical synthesis of nanosized hollow hematite

Bang, Jin Ho and Suslick, Kenneth S. (2007) Sonochemical synthesis of nanosized hollow hematite. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 129 (8). 2242+.

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Nanosized hollow iron oxide was synthesized using high-intensity ultrasound with carbon nanoparticles as a template. The hollow iron oxide was characterized by TEM, STEM, EELS, XRD, Raman, Mossbauer, and SQUID analyses. The TEM examination, EDS, and EELS analyses demonstrated the formation of iron oxide with nanosized hollow cores. XRD, Raman, and Mossbauer studies revealed that the hollow iron oxide is the most thermodynamically stable iron oxide, hematite (alpha-Fe2O3). Magnetization measurements showed that the hollow nanospheres of hematite are weakly ferromagnetic. Upon annealing, the hollow hematite becomes more crystalline but still maintains the hollow structure. Without the use of the carbon template, only agglomerated amorphous iron oxide was obtained.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanochemistry
Material Science > Nanostructured materials
ID Code:3226
Deposited By:Anuj Seth
Deposited On:14 Jan 2009 14:14
Last Modified:20 Jan 2009 15:58

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