Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Rehydroxylation of dehydrated silica surfaces by water vapor adsorption

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

The rehydroxylation reaction of siloxane bridges was studied for silica gel particles dehydrated by preheating. Adsorption isotherms of water vapor at 298 K were measured for the samples which were preheated at different temperatures. The amounts of total adsorption and irreversible adsorption were examined against the preheating temperature and vapor pressure. The number of the hydroxyl groups produced by the rehydroxylation of siloxane was measured by thermogravimetric analysis to determine the adsorption isotherms for chemisorption of water. For the surface preheated at 673 K, the siloxane bridges were fully rehydroxylated for about 3 h at a relative pressure of 0.3. The surface preheated at 873 K was gradually rehydroxylated with increasing pressure and the rehydroxylation was not complete even for 90 h at a relative pressure lower than 0.7. In the high-pressure region, the rehydroxylation was promoted by condensed water. The number of surface hydroxyls after rehydroxylation became greater than that on the original surface. The possibility of the generation of the geminal hydroxyls was suggested from the degree of rehydroxylation on the surface.


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation