%0 Journal Article
%T Preparation of TiO2 Aerogels by Ambient Pressure Drying
%A HU Jiu-Gang
%A CHEN Qi-Yuan
%A LI Jie
%A LU Bin
%A LI Peng-Ju
%J 无机材料学报
%D 2009
%I Science Press
%R 10.3724/sp.j.1077.2009.00685
%X TiO2 aerogels were prepared by sol-gel method at ambient pressure using tetrabutyl titanate as raw material, formamide as drying control chemical additive, tetralthyl orthosilcate(TEOS)/ethanol as pore fluids extractant. The structural properties of aerogel samples were characterized by means of XRD, BET, TEM, SEM, EDS and FT-IR, etc. Experimental results show that asa2prepared TiO2 aerogel is in amorphous state with the apparent density of 0.375g/cm3, the specific surface area of 523m2/g and the average pore size of about 9.9nm. After calcinated at 850  n air for 4h, the sampletransforms from amorphous state to anatasea2type crystal, while its ˉ pore volume shrinks and average pore size increases to 16.3nm, the specific surface area reduces to 208m2/g. TiO2 aerogel prepared by the above method presents excellent thermal stability and high specific surface area.
%K TiO2
%K aerogel
%K sol-gel
%K ambient pressure drying
%U http://www.jim.org.cn/fileup/PDF/20090408.pdf