A novel method for preparing mesoporous Ti-MCM-41 has been developed. By means of stabilizing Ti^4+ with H2O2, a series of Ti-MCM-41 with different inorganic titanic salts as Ti sources have been synthesized via an electrostatic S^+ I^- templating pathway using [C16H33N(CH3)3] Br(CTMAB) as the surfactant. The samples were characterized by powder X-ray diffraction(XRD), FT-IR and nitrogen adsorption, the results show that the samples have highly ordered mesoporous structure and Ti atoms have been incorporated into the framework. In catalyzing oxidation of styrene with hydrogen peroxide (H2O2), the Ti-MCM-41 samples prepared from inorganic Ti sources exhibits higher catalytic activity than those prepared from organic Ti species (TBOT). The nature of inorganic titanic salts has conisderble influence upon the incorporation of Ti into the silica framework. The samples prepared from Ti(SO4)2 or TiCl4 possess higher catalytic activity for the oxidation of styrene with H2O2.

Key words: TITANIUM, MOLECULAR SIEVE, STYRENE, OXIDATION, X- RAY DIFFRACTION ANALYSIS, ADSORPTION, FOURIER TRANSFORM, INFRARED SPECTROPHOTOMETRY