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 N-2 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. N-2 physisorption exhibits that the pore diameter and BET surface area of Ti-MST-8 are 2.8 nm and 1213 m(2)/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. (C) 2016 Elsevier B.V. All rights reserved.
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UPMC Univ Paris 6, Lab Reactivite Surface, UMR 7197, F-75252 Paris 05, France
CNRS, Lab Reactivite Surface, UMR 7197, F-75252 Paris, FranceUPMC Univ Paris 6, Lab Reactivite Surface, UMR 7197, F-75252 Paris 05, France
Dzwigaj, Stanislaw
Millot, Yannick
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UPMC Univ Paris 6, Lab Syst Interfaciaux Echelle Nanometr, UMR 7142, F-75252 Paris 05, France
CNRS, Lab Syst Interfaciaux Echelle Nanometr, UMR 7142, F-75252 Paris 05, FranceUPMC Univ Paris 6, Lab Reactivite Surface, UMR 7197, F-75252 Paris 05, France
Millot, Yannick
Che, Michel
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UPMC Univ Paris 6, Lab Reactivite Surface, UMR 7197, F-75252 Paris 05, France
CNRS, Lab Reactivite Surface, UMR 7197, F-75252 Paris, France
Inst Univ France, Paris, FranceUPMC Univ Paris 6, Lab Reactivite Surface, UMR 7197, F-75252 Paris 05, France