无机材料学报

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块状TiO2气凝胶的形成过程及其对品质的影响

甘礼华; 陈龙武; 徐子颉   

  1. 同济大学化学系 上海 200092
  • 收稿日期:2000-09-30 修回日期:2000-11-06 出版日期:2001-09-20 网络出版日期:2001-09-20

Formation Process of Monolithic TiO2 Aerogels and Its Effect on Aerogels Properties

GAN Li-Hua; CHEN Long-Wu; XU Zi-Jie   

  1. Department of Chemistry Tongji University; Shanghai 200092; China
  • Received:2000-09-30 Revised:2000-11-06 Published:2001-09-20 Online:2001-09-20

摘要: 研究了TiO气凝胶形成过程中制备条件和凝胶化过程对块状TiO气凝胶宏观性质的影响,结果表明所得气凝胶是由粒度约为4~6nm的TiO非晶态微粒连结而成的具有均匀网络结构的多孔性超轻量级块状材料,通过严格控制制备过程中凝胶化过程的条件及状态,可以获得不同密度不同品质的TiO气凝胶.

关键词: TiO2气凝胶, 块状材料, 制备, 凝胶化过程

Abstract: Monolithic TiO2 aerogels were prepared by the process of hydrolysis and condensation of tetrabutyl titanate as precursor, and following by supercritical
drying. The effect of the preparing conditions and gelation process on macroscopic properties of monolithic TiO2 aerogels was studied. The results indicate
that the final aerogels, which consist of amorphous TiO2 with particle sizes of about 4-6nm, are uniform continuous network structural superlight monolithic materials with high porosity. The monolithic TiO2 aerogels with different densities
and properties can be prepared by controlling the conditions of gelation process vigorously.

Key words: TiO2 aerogel, monolithic materials, preparation, gelation process

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