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Titanium-rich highly ordered mesoporous silica synthesized by using a mixed surfactant system |
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| Authors: | Debraj Chandra Manabendra Mukherjee |
| Institution: | a Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India b Dynamic Materials Research Group, National Institute of Advance Industrial Science and Technology, Ikeda, Osaka 563-8577, Japan c Surface Physics Division, Saha Institute of Nuclear Physics, Bidhannagar, Kolkata 700 064, India |
| Abstract: | A new titanium-rich highly ordered 2-D hexagonal mesoporous titanium silicate has been synthesized using a mixture of cationic (cetyltrimethylammonium bromide, CTAB) and non-ionic (Brij-35, C12H25-(OC2H4)23-OH, a polyether and aliphatic hydrocarbon chain surfactant) mixed surfactant system as the supramolecular structure directing agent (SDA) in the presence of tartaric acid (TA) as a mineralizer of Ti(IV). XRD, N2 adsorption and TEM data suggested the presence of mesophase with hexagonal pore arrangements and the UV-visible, FT IR and XPS studies suggested the incorporation of mostly tetrahedral titanium (IV) species in the highly ordered silica network. This mesoporous titanium silicate material showed excellent catalytic activity and selectivity in the epoxidation of styrene using dilute aqueous H2O2 as oxidant. |
| Keywords: | Mesoporous materials Mixed-surfactant Titanium silicate Partial oxidation |
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