Abstract
Novel mesostructured titanosilicates (Ti-MST) have been successfully assembled from preformed silicalite-1 precursors using two-step hydrothermal synthesis method. The samples were characterized by XRD, FT-IR, UV–vis and N2 physisorption. The results show that Ti-MST zeolites are pure mesoporous phase possessing zeolitic secondary building units (SBU) in the pore walls. UV–vis confirms the existence of tetrahedral coordinated titanium. N2 physisorption exhibits that the pore diameter and BET surface area of Ti-MST-8 are 2.8nm and 1213m2/g. Ti-MST displays high hydrothermal stability in boiling water as compared with Ti-MCM-41 due to the incorporation of SBU fragments in the mesopore walls.
Published Version
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