Nano Archive

Synthesis and photocatalytic activity of nanocrystalline TiO2-SrO composite powders under visible light irradiation

Han, Jae-Kil and Choi, Sung-Min and Lee, Gae-Ho (2007) Synthesis and photocatalytic activity of nanocrystalline TiO2-SrO composite powders under visible light irradiation. Materials Letters, 61 (18). 3798 - 3801.

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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

Abstract

Nano-sized homogeneously distributed TiO2–20, –40, –60 wt.% SrO composite powders were successfully synthesized by a sol–gel method. The as-received amorphous TiO2—20 wt.% SrO composite powders were crystallized with anatase TiO2 at around 750 °C. As calcination temperatures increased, the anatase TiO2 crystalline phase was transformed to rutile TiO2 at about 900 °C, whereas nano-sized, squarish SrTiO3 phase was detected. The peaks obtained after calcining at 1050 °C mainly exhibited the rutile TiO2 and SrTiO3 phases. However, a small number of SrO2 peaks were also detected. For the comparison of photocatalytic activity depending on light sources, TiO2–SrO composite powders were tested in phenol degradation. TiO2–60 wt.% SrO composite powder showed good visible light photoactivity for the photo-oxidation of phenol.

Item Type:Article
Uncontrolled Keywords:Nanoparticle; Microstructure; Photoactivity; Sol–gel
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:6707
Deposited By:SPI
Deposited On:09 Feb 2010 12:48
Last Modified:09 Feb 2010 12:48

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