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• W2051213438 endingPage "282" @default.
• W2051213438 startingPage "273" @default.
• W2051213438 abstract "TS-1 has been synthesized following a method based on the wetness impregnation with a template solution of amorphous SiO2TiO2 solids followed by crystallization under autogenous pressure. The preparation of the raw SiO2TiO2 solids has been carried out by different two-step sol-gel processes in order to achieve the formation of SiOTi bonds prior to the zeolite synthesis. The properties of the TS-1 samples obtained strongly depend on the method used to prepare the starting amorphous cogel. All TS-1 samples showed high catalytic activity for n-hexane oxyfunctionalization with H2O2. X-Ray diffraction (XRD), infrared (IR) and catalytic measurements evidence the Ti incorporation into the zeolite framework. Diffuse reflectance ultraviolet-visible (DR UV-VIS) spectroscopy shows that the Ti atoms are occupying tetrahedral positions in the TS-1 lattice, whereas bulk anatase and extraframework Ti species are not detected. Thermogravimetric analysis (TGA) and n-hexane adsorption measurements confirm the high crystallinity of the material obtained by this procedure. The size of the crystallites ranges between 0.4 and 5 μm depending on the method used to prepare the raw SiO2TiO2 cogel. When compared to the conventional procedures of TS-1 preparation by hydrothermal crystallization of a liquid gel, the method studied here is simpler, requires a lower reaction volume and proceeds with shorter synthesis time. In addition, TS-1 prepared by wetness impregnation of SiO2TiO2 cogels exhibits properties similar to those of the material obtained following the recipe of the original TS-1 synthesis patent." @default.
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• W2051213438 date "1995-07-01" @default.
• W2051213438 modified "2023-10-01" @default.
• W2051213438 title "Synthesis of TS-1 by wetness impregnation of amorphous SiO2TiO2 solids prepared by the sol-gel method" @default.
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• W2051213438 doi "https://doi.org/10.1016/0927-6513(95)00007-v" @default.
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