首次采用含镍硅酸乙酯（NiTEOS）进行溶胶-凝胶反应来制备高镍含量的Ni／SiO2复合气凝胶，且Ni含量可在＜60wt％的范围内任意调节．并系统研究了水浓度、催化剂浓度、溶剂用量及合镍硅酸乙酯的组成对溶胶-凝胶过程的影响．所制备的Ni／SiO2复合气凝胶的比表面积高达420～650m2／g.
Ni-rich Ni/SiO2 composite aerogels in which weight percentage of Ni could reach 60% werefirstly prepared by sol-gel process of Ni-containing tetraethyl orthosilicate (NiTEOS). The influenceof H2O, catalyst, solvent and compostcomposition of Ni-containing tetraethyl orthosilicate on the sol-gelprocess was discussed. The specific sufrace areas of Ni/SiO2 composite aerogels are in the rangeof 420~650m2/g.
参考文献
| [1] | Fricke J. Aerogels, Springer-Verlag, Berlin, Heideberg, 1986 2 Pajonk G M. Applied Catalysis, 1991, 72: 217--221 3 Buckly A M, Greenblatt. Non-Cryst. Solids, 1992, 146: 97--102 4 Livage J, Sanchez C J. Non-Cryst. Solids, 1992, 145: 11--16 |
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