Abstract
Nanocrystalline CaFe204 oxide semiconductor with spinel structure was synthesized by polymerized complex (PC) method and investigated for its physical and optical properties. The crystallization of CaFe204 made by PC method was found to occur in the temperature range of 700-1100 °C. The observation of highly pure phase and such lower crystallization tempearture in CaFe204 made by PC method, is in total contrast to that observed in CaFe204 prepared by the conventional solid-state reaction (SSR) method. The activation energy required for the growth of nanocrystalline CaFe204 in PC sample was found to be 8.4 kJ/mol. The band gap of nanocrystalline CaFe204 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.
| Original language | English |
|---|---|
| Pages (from-to) | 3568-3573 |
| Number of pages | 6 |
| Journal | Journal of nanoscience and nanotechnology |
| Volume | 9 |
| Issue number | 6 |
| DOIs | |
| State | Published - 2009.06 |
Keywords
- Calcium ferrites
- Nano-particles
- Photocatalytic activity
- Polymerized complex method
- Visible light
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