ISSN:
1435-1536
Keywords:
Key words Modification
;
faujasite
;
surface silanol groups
;
hydroxy nests
;
alkyl group introduction
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 Alkyl group introduction into zeolite surfaces was attempted utilizing the reactivity of surface silanol groups as lattice defects resulting from hydrothermal or acid treatment of zeolites. The reaction was carried out using organosilane and alcohols, and traced by in situ IR measurement as well as by elemental analysis. In situ IR measurement demonstrated high reactivity of terminal silanol groups. A good correlation was noted between the amount of reacted groups and the amount of terminal silanol groups, indicating high reactivity of terminal silanol groups and very low reactivity of silanol groups that form hydroxy nests. Treated zeolite exhibited high hydrophobicity, such that it floats on water.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s003960050338
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