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Citation: JIAO Jian-Xia, LI Li-Min, LIU Xiao-Fang, WANG Shu-Ling, XU Qun. Preparation of TiO₂/SiO₂ Composite Material with PEG2000 as Template in Supercritical CO_2[J]. Chinese Journal of Applied Chemistry, ;2008, 25(11): 1281-1285. shu

Preparation of TiO₂/SiO₂ Composite Material with PEG2000 as Template in Supercritical CO_2

1.
a Department of Chemistry;
2.
b College of Materials Engineering, Zhengzhou University, Zhengzhou 450052

Corresponding author: XU Qun,
Received Date: 19 October 2007
Available Online: 17 March 2008
Fund Project: 国家自然科学基金(20404012) (20404012)河南省自然科学基金(0411020900)资助项目 (0411020900)

TiO₂/SiO₂ composite material was prepared with PEG2000 as template and tetraethyl orthosilicate and tetrabutyl titanate as precursors in supercritical carbon dioxide(SC-CO₂).The effect of the pressure on the impregnating ratio was studied and the product was characterized by XRD,FT-IR,nitrogen adsorption-desorption experiment and SEM.The X-ray diffraction result shows that the product is a composite of anatase TiO₂ and crystal SiO₂.An absorption peak appears at 935.5 cm^-1,this band is ascribed to the vibration of Ti-O-Si bonds,which indicates the interaction of TiO₂ and SiO₂.The BET surface area calculated from the nitrogen adsorption isotherms of the product was up to 97.19 m²/g and the average pore diameter was about 2 nm.The SEM photographs of TiO₂/SiO₂ composite illustrate that the PEG with different molecular mass has a certain influence on the morphology of the product.
- supercritical carbon dioxide,
- PEG,
- template,
- TiO₂/SiO₂,
- composite material
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Preparation of TiO2/SiO2 Composite Material with PEG2000 as Template in Supercritical CO_2

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通讯作者: 陈斌, bchen63@163.com

Preparation of TiO₂/SiO₂ Composite Material with PEG2000 as Template in Supercritical CO_2