Abstract
Titania nanocrystals were prepared by a low temperature process in liquid media. The crystallization of amorphous precursor could proceed at low temperature around room temperature. The thermodynamically stable rutile formed at low temperature below 70°C, while the metastable anatase formed at higher temperature. The phase composition, microstructure, morphology, and specific surface area of titania changed significantly depending on the reprecipitation temperatures. Well-crystallized needle-like rutile titania crystals with high specific surface areas possessed higher photocatalytic activities than those of anatase crystals under visible light irradiation of wavelength >400 nm and /or >510 nm.
| Original language | English |
|---|---|
| Pages (from-to) | 2503-2506 |
| Number of pages | 4 |
| Journal | Gongneng Cailiao/Journal of Functional Materials |
| Volume | 35 |
| Issue number | SUPPL. |
| Publication status | Published - 2004 Sep 1 |
Keywords
- Low-temperature synthesis
- Photocatalyst
- Titania nanocrystal
- Visible light response activities
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry