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Updated: May 24, 2026

A Synthetic Methodology for Preparing Impregnated and Grafted Amine-Based Silica Composites for Carbon Capture
Published on: September 29, 2023
A well-defined mesoporous amine silica surface via a selective treatment of SBA-15 with ammonia
Anissa Bendjeriou-Sedjerari1, Jérémie D A Pelletier, Edy Abou-Hamad
1King Abdullah University of Science & Technology, KAUST Catalysis Center, 23955-6900 Thuwal, Saudi Arabia.
Abstract:
2D double-quantum (1)H-(1)H NMR unambiguously shows that the "isolated" ≡Si-OH surface silanols of dehydroxylated SBA-15 are converted upon treatment with ammonia into single silylamine surface site ≡Si-NH(2). The "gem" di-silanols (=Si(OH)(2)) remain intact. Treatment using HMDS produces (=Si(OSiMe(3))(2)) but leaves ≡Si-NH(2) untouched. The resulting surface is hydrophobic and stable.
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