ENVR 41 |
| Mesoporous organosilicates, MCM-41 containing organic groups, such as phenylene- or ethylene-bridged, imidazole or amine, were synthesized by the hydrolysis and co-condensation of alkoxysilyl precursors, bis(triethoxysilyl)ethane (BTSE) or bis(triethoxysilyl)benzene (BTSB) n-(3-triethoxysilylpropyl)-4,5-dihydroimidazole and bis[3-(trimethoxysilyl)-propyl]amine, under basic conditions. Cetyltrimethylammonium bromide (CTABr) was used to increase the porosity and surface areas of these materials via the surfactant template approach. Further post-synthesis modification was used to functionalize the all-silica, MCM-41 using or n-(3-triethoxysilylpropyl)-4,5-dihydroimidazole and Bis[3-(trimethoxysilyl)-propyl]amine. The functionalized mesoporous silica was evaluated for the adsorption of phenolic organikc compounds from water. Materials containing an imidazole group exhibited greater affinity for 2,4-dinitrophenol adsorption. |
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Advances in Adsorption Processes for Drinking Water Treatment and Sourcewater Protection
1:30 PM-5:10 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 236, Oral
Division of Environmental Chemistry |