ISSN:
1573-4854
Keywords:
mesoporous silica
;
water in mesopores
;
benzene in mesopores
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract 1H NMR investigations have been carried out on water- and benzene-saturated mesoporous sillicas with a wide range of pore sizes (13–42 Å). The freezing point of the bound water increases with the pore size, approaching that of bulk water at large pore sizes. With large pore sizes, there is more than one transition due to the bound water species. The benzene-saturated samples show a behavior similar to that of water-saturated samples, although the freezing point depression is significantly greater. The pore size distribution generally becomes broader with the increase in pore size. The original Kelvin equation is satisfactory to estimate the pore radii both in the case of water and benzene-saturated samples.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009609809134
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