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Acta Physico-Chimica Sinica  2005, Vol. 21 Issue (03): 229-233    DOI: 10.3866/PKU.WHXB20050301
Preparation and Characterization of Silica-modified Titanium Dioxide Nanoparticles by Co-precipitation Method
LI Zhi-Jie; HOU Bo; XU Yao; WU Dong; SUN Yu-Han
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001; Graduate School of the Chinese Academy of Sciences, Beijing 100039
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Abstract  Silica-modified titanium dioxides were prepared by co-precipitation method and then characterized by XRD, FT-IR, XPS, TEM, and UV-Vis absorption spectroscopy. The results showed that there was a strong interaction between SiO2 and SiO2, and Ti-O-Si bonds formed on silica-modified titanium dioxide surfaces. The addition of silica in SiO2 particle could effectively suppress the formation of rutile phase, the decrease of surface area and the growth of titanium dioxide crystals. The band-gap transition increased with the increase of silica content. In comparison with pure SiO2 nanoparticles, the silica-modified SiO2 nanoparticles exhibited better photocatalytic activity, and the activity increased with the silica content.

Key wordsTitanium dioxide nanoparticles      Silica      Co-precipitation       Photocatalytic     
Received: 04 July 2004      Published: 15 March 2005
Corresponding Authors: SUN Yu-Han     E-mail:
Cite this article:

LI Zhi-Jie; HOU Bo; XU Yao; WU Dong; SUN Yu-Han. Preparation and Characterization of Silica-modified Titanium Dioxide Nanoparticles by Co-precipitation Method. Acta Physico-Chimica Sinica, 2005, 21(03): 229-233.

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