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The entrapment of UO22+ in mesoporous MCM-41 and MCM-48 molecular sieves

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Title The entrapment of UO22+ in mesoporous MCM-41 and MCM-48 molecular sieves
 
Creator VIDYA, K
DAPURKAR, SE
SELVAM, P
BADAMALI, SK
GUPTA, NM
 
Subject ion-planted mcm-41
functionalized monolayers
silica
design
uranyl ions
mesoporous silica
ion-exchange
mcm-41
mcm-48
 
Description A method based on direct template-ion-exchange was employed for the entrapment of UO22+ ions in MCM-41 and 2 MCM-48 molecular sieves via swapping of cetyltrimethylammonium cations present in the mesoporous channels by the UO22+ ions in an aqueous solution. The samples were characterized by XRD, FT-IR, and ICP-AES techniques. The entrapment of UO22+ ions is facilitated by the large pore size vis-a-vis the high surfactant content in the as-synthesized host materials. A higher loading of UO22+ ions was achieved in MCM-48 as compared to MCM-41, which could be attributed to its three-dimensional pore system and higher surfactant-to-silica ratio. FT-IR results provide an evidence of a strong binding of UO22+ groups with the defect silica sites of mesoporous molecular sieves. (C) 2001 .
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-27T01:27:28Z
2011-12-26T12:53:01Z
2011-12-27T05:40:05Z
2011-07-27T01:27:28Z
2011-12-26T12:53:01Z
2011-12-27T05:40:05Z
2001
 
Type Article
 
Identifier MICROPOROUS AND MESOPOROUS MATERIALS, 50(2-3), 173-179
1387-1811
http://dx.doi.org/10.1016/S1387-1811(01)00445-0
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7074
http://hdl.handle.net/10054/7074
 
Language en