A study of the structural role of water in hydrous silica glass using cross-polarisation magic angle spinning NMR |
| |
| Institution: | 1. Department of Physics, University of Warwick, Coventry, CV4 7AL, U.K.;2. Department of Geology, University of Manchester, Manchester, M13 9PL, U.K.;1. Okan University, Mechanical Engineering Department, Istanbul, Turkey;2. Osmaniye Korkut Ata University, Chemical Engineering Department, Osmaniye, Turkey;1. Department of Analytical and Environmental Chemistry and Szentágothai Research Center, University of Pécs, Ifúság útja 6, H-7624 Pécs, Hungary;2. MTA-PTE Molecular Interactions in Separation Science Research Group, Ifúság útja 6, H-7624 Pécs, Hungary;3. Institute of Bioanalysis, University of Pécs, Szigeti út 12, H-7624 Pécs, Hungary |
| |
| Abstract: | Hydrous silica glasses containing 2.5 wt.% and 8.7 wt.% H2O were prepared by quenching melts from high pressures and temperatures, and investigated by 29Si NMR. Cross-polarisation magic angle spinning NMR experiments are described and used to identify silicon in different structural units within the glasses. The relative amounts of each structural unit are obtained by quantitative single pulse MASNMR and used together with the known water content to give the extent of hydroxyl formation. The hydroxyl concentration appears to be lower than that suggested by most previous work on hydrous silicate glasses using other experimental techniques. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
