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Conducting the precipitation of hydrous mixed oxide at a pH>8 in the presence of cationic surfactant should permit the cation exchange process between H+ and the surfactant together with the formation of an inorganic/organic composite which upon calcination will originate a mesoporous mixed-oxide phase.The strong similarity of the isoelectric points of Zr and Ce would enable exchangeble sites to be equally distributed over the surface and the extent of substitution of the hydroxy groups to be comparable. [ Last edited by С?2133 on 2009-5-6 at 13:11 ] |
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2楼2009-05-06 14:51:37