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《New Building Materials》 2010-06
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Preparation of nano porous TiO_2 material using freeze-drying method

WANG Lijiu,XU Haixun(Institute of Building Materials,Dalian University of Technology,Dalian 116024,Liaoning,China)  
With Tetra-n-butyl titanate as precursor,the process for preparing TiO2 cryogel by sol-gel method and freezedrying route was studied in the paper.Then,the macro and micro morphology and structure of the TiO2 cryogel sample were investigated by Transmission Electron Microscopy(TEM),N2 adsorption/desorption method,thermo-gravimetric analysis/differential thermal analysis,and laser particle size analyzer.Observation showed that the material was a kind of nano ultrafine particles,with specific area of 222.0 m2/g,pore volume of 0.116 ml/g and average pore size in range of 2 ~5 nm.The thermal analysis result showed that TiO2 cryogel possessed the preferable thermal stability,and the titanium dioxide material was transformed from anatase phase into rutile phase from 600 ℃.
【Fund】: 国家“十一五”科技支撑计划重大项目(2006BAJ04A04);; 辽宁省高等学校基金资助项目(2008S190)
【CateGory Index】: TB383.1
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