Citation:
Wang Tong-Wen, Dai Le-Rong. Synthesis of Hexa nal Mesostructured Titaniumcontaining Silica by Mixed Supramolecular Templating[J]. Acta Physico-Chimica Sinica,
;2001, 17(01): 10-14.
doi:
10.3866/PKU.WHXB20010103
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Using the mixture of cetyltrimethylammonium bromide(CTAB) and neutral alkylamine surfactant (CnNH2n+3, n=8,10,12,14,16) as templated, hexa nal mesostructured titaniumcontaining silica TiMCM-41 was synthesized. XRD and TEM provided direct evidence for a wellordered hexa nal nano pore structure. N2 adsorption/desorption isotherm showed that highly ordered TiMCM41 materials exhibited sharp steps of capillary condensation and narrow pore size distributions. The effect of the ratio of titanium to silica(Ti/Si) and the chain length n of the alkylamine on the mesostructure were investigated. It was revealed that phase transition from hexa nal to amorphous structure occured with Ti/Si >0.15 and from hexa nal to lamellar structure appppeared with n=18.
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