Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (01): 10-14.doi: 10.3866/PKU.WHXB20010103

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Synthesis of Hexagonal Mesostructured Titaniumcontaining Silica by Mixed Supramolecular Templating

Wang Tong-Wen;Dai Le-Rong   

  1. Institute of Physical Chemistry, Peking University, Beijing 100871
  • Received:2000-04-30 Revised:2000-06-21 Published:2001-01-15
  • Contact: Dai Le-Rong

Abstract: Using the mixture of cetyltrimethylammonium bromide(CTAB) and neutral alkylamine surfactant (CnNH2n+3, n=8,10,12,14,16) as templated, hexagonal mesostructured titaniumcontaining silica TiMCM-41 was synthesized. XRD and TEM provided direct evidence for a wellordered hexagonal nano pore structure. N2 adsorption/desorption isotherm showed that highly ordered TiMCM41 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 hexagonal to amorphous structure occured with Ti/Si >0.15 and from hexagonal to lamellar structure appppeared with n=18.

Key words: Mixed surfactants, Template, Hexagonal mesoporous, Titaniumcontaining silica, Synthesis