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Lee, Jae Sung
Eco-friendly Catalysis and Energy Lab
Research Interests
  • Photocatalytic water splitting, artificial photosynthesis, fuel cells, heterogeneous catalysis

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Physical and Optical Properties of Nanocrystalline Calcium Ferrite Synthesized by the Polymerized Complex Method

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Title
Physical and Optical Properties of Nanocrystalline Calcium Ferrite Synthesized by the Polymerized Complex Method
Other Titles
Physical and Optical Properties of Nanocrystalline Calcium Ferrite Synthesized by the Polymerized Complex Method
Author
Jeong, Euh DuckBorse, Pramod H.Jang, Jum SukLee, Jae SungCho, C. R.Bae, J. S.Park, S.Jung, O-S.Ryu, S. M.Won, M. S.Kim, Hyun Gyu
Keywords
Calcium ferrites;  Nano-particles;  Photocatalytic activity;  Polymerized complex method;  Visible light
Issue Date
2009-06
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.9, no.6, pp.3568 - 3573
Abstract
Nanocrystalline CaFe(2)O(4) oxide semiconductor with spinel structure was synthesized by polymerized complex (PC) method and investigated for its physical and optical properties. The crystallization of CaFe(2)O(4) made by PC method was found to occur in the temperature range of 700-1100 degrees C. The observation of highly pure phase and such lower crystallization tempearture in CaFe(2)O(4) made by PC method, is in total contrast to that observed in CaFe(2)O(4) prepared by the conventional solid-state reaction (SSR) method. The activation energy required for the growth of nanocrystalline CaFe(2)O(4) in PC sample was found to be 8.4 kJ/mol. The band gap of nanocrystalline CaFe(2)O(4) determined by UV-DRS was 1.91 eV (647 nm). The photocatalytic activity of PC materials for iso-propyl alcohol photodegradation under visible light (>= 420 nm) was much higher than that of SSR materials
URI
https://scholarworks.unist.ac.kr/handle/201301/12321
DOI
10.1166/jnn.2009.NS31
ISSN
1533-4880
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