Mesoporous TMOS-MTMS copolymer silica gels catalyzed by fluoride
Mesoporous HF-catalyzed tetramethoxysilane-methyltrimethoxysilane (TMOS-MTMS) copolymer silica gels with average pore diameter from 80 to 100 Å and narrow pore size distribution have been obtained. Mesoporous TMOS-MTMS copolymer gels with tetramethoxysilane ranging from 10% to 100% were also produced with tetrabutylammonium fluoride (TBAF) catalyst. The pore sizes of TBAF-catalyzed copolymer gels were controlled over a range from 25 to 194 Å. Their pore sizes increased with increasing fluoride content to R2=0.112 (R2, molarratio of F/Si) and then level off. The catalytic effect of fluoride on the sol-gel process was investigated. The results suggest that multi-fluorinated silicon species catalyze the silica polymerization. © 2001 Elvier Science B.V. All rights reserved.
Publication Source (Journal or Book title)
Journal of Non-Crystalline Solids
He, L., Powers, K., Baney, R., Gower, L., Duran, R., Sheth, P., & Carino, S. (2001). Mesoporous TMOS-MTMS copolymer silica gels catalyzed by fluoride. Journal of Non-Crystalline Solids, 289 (1-3), 97-105. https://doi.org/10.1016/S0022-3093(01)00698-6