A simple liquid state 1H NMR measurement to directly determine the surface hydroxyl density of porous silica

Silica is widely used in industrial applications and its performance is partially decided by its surface hydroxyl density αOH. Here we report a quick, simple liquid 1H NMR method to determine αOH using a benchtop 1H NMR spectrometer. The results show excellent agreement with the literature with an α...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2021-11, Vol.57 (95), p.12804-12807
Main Authors: Penrose, C, Steiner, P, Gladden, L F, Sederman, A J, York, A P E, Bentley, M, Mantle, M D
Format: Article
Language:English
Subjects:
Density
Industrial applications
NMR
Nuclear magnetic resonance
Silicon dioxide
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Summary:Silica is widely used in industrial applications and its performance is partially decided by its surface hydroxyl density αOH. Here we report a quick, simple liquid 1H NMR method to determine αOH using a benchtop 1H NMR spectrometer. The results show excellent agreement with the literature with an αOH range from 4.16 to 6.56 OH per nm2.
ISSN:1359-7345
1364-548X
DOI:10.1039/d1cc03959h