Correlation between gelation time, structure and texture of low-doped silica gels

It is shown how the properties of a porous silica xerogel prepared using a classical sol-gel synthesis can be fine-tuned by a minor modification of the composition. The addition of a doping cation (Cu 2+ , Ca 2+ , Na + ) in trace quantities in the silica sol was found to exert a dramatic effect at a...

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