A New Method for Preparing Porous Ti-Si Dioxide Composite with High Surface Area

Abstract

Abstract: Anew method named peptizinggelation method was used to synthesize TiSi dioxide composite, whose surface area is above 1000 m²/g. The character of this method is that Ti exists in the form of ion and ion cluster during the hydrolysis of Si(OC₂H₅)₄. This is the progress on the cohydrolysis of Si(OC₂H₅)₄and Ti(OC₄H₉)_4.During the calcination of gelation, Ti-O-Si was formed with Ti element in the situation of SiO₂crystal cell. This is confirmed by FTIRanalysis. TiSi dioxide composite with Ti molar fraction of 13.1% is mainly in the form of amorphous based on XRDanalysis, which reveals that TiSi dioxide composite is uniform in structure. Furthermore, extra Ti element presents on the surface layer of TiSi dioxide composite examined by Raman and EESanalysis. Owning to these two characters, TiSi dioxide composite prepared by peptizinggelation method becomes a good catalyst in the field of catalysis.

Key words: Ti-Si dioxide composite, Peptizing-gelation, Porous, High surface area

CLC Number:

O612

TrendMD:

ZHAO Jing-Zhe, YANG Shao-Feng, WANG Zi-Chen, SHA Xiao-Xiang, ZHAO Mu-Yu, SHAN Zhi-Jun, DING Shi-Zhou. A New Method for Preparing Porous Ti-Si Dioxide Composite with High Surface Area[J]. Chem. J. Chinese Universities, 2000, 21(2): 292.

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A New Method for Preparing Porous Ti-Si Dioxide Composite with High Surface Area

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