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Facile synthesis of titania-encapsulated magnetites with controlled magnetism and surface morphology
- Authors
- Kim, Sung-Eun; Lee, Sang-Wha
- Issue Date
- Oct-2012
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Composites; Nanostructures; Chemical synthesis; Magnetic properties
- Citation
- MATERIALS RESEARCH BULLETIN, v.47, no.10, pp.2969 - 2973
- Journal Title
- MATERIALS RESEARCH BULLETIN
- Volume
- 47
- Number
- 10
- Start Page
- 2969
- End Page
- 2973
- ISSN
- 0025-5408
- Abstract
- Titania-encapsulated magnetites (A-Fe3O4@TiO2) were facilely fabricated through the modified sol-gel reaction of APTMS-complexed Fe3O4 (A-Fe3O4) with tetraethyl orthotitanate (TEOT). The magnetism and surface morphology of A-Fe3O4@TiO2 were controlled by adjusting the thickness of titania capsule layer. A-Fe3O4@TiO2 exhibited the superparamagnetic characteristics of negligible remanence and coercity. Thermal analysis of A-Fe3O4@TiO2 showed that the amorphous titania was transformed into crystalline phase at around 440 degrees C. The core-shell magnetite-titanium nanocomposites can be an attractive candidate for recyclable photocatalysts with magnetite core and/or active Fe3O4 electrode materials with buffering TiO2 capsules. (C) 2012 Elsevier Ltd. All rights reserved.
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Related Researcher
- Lee, Sang Wha
- Engineering (화공생명배터리공학부)