Artículos de revistas
Thermogravimetry as a reliable tool to estimate the density of silanols on a silica gel surface
Registro en:
Journal Of Thermal Analysis And Calorimetry. Kluwer Academic Publ, v. 53, n. 3, n. 751, n. 756, 1998.
0368-4466
WOS:000077030800007
10.1023/A:1010174224567
Autor
de Farias, RF
Airoldi, C
Institución
Resumen
A method was developed to estimate the density of the silanol groups attached to silica gel surfaces from thermogravimetric data. Depending on the mechanism of condensation of silanol groups during heating, after removing physically adsorbed water, the results obtained ranged from 4.3 to 6.7 OH nm(-2) for a series of silicas. The data are in good agreement with those obtained by other techniques. Thermogravimetry proved to be a reliable tool for this kind of study, with the great advantage of being a simple, quick and inexpensive method requiring only a few mg of the silica sample. 53 3 751 756