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

C PenroseP SteinerL F GladdenA J SedermanAndrew P E YorkM BentleyMick D Mantle

Published in: Chemical communications (Cambridge, England) (2021)

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.

Keyphrases

high resolution
magnetic resonance
solid state
ionic liquid
systematic review
heavy metals
wastewater treatment
photodynamic therapy
mass spectrometry
risk assessment