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Synthesis and Characterisation of Hierarchically Structured Titanium Silicalite-1 Zeolites with Large Intracrystalline Macropores
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SYSNO ASEP 0517543 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Synthesis and Characterisation of Hierarchically Structured Titanium Silicalite-1 Zeolites with Large Intracrystalline Macropores Author(s) Weissenberger, T. (DE)
Leonhardt, R. (DE)
Zubiri, B. A. (DE)
Pitínová-Štekrová, Martina (UFCH-W)
Sheppard, T. L. (DE)
Reiprich, B. (DE)
Bauer, J. (DE)
Dotzel, R. (DE)
Kahnth, M. (DE)
Schropp, A. (DE)
Schroer, Ch. G. (DE)
Grunwaldt, J.-D. (DE)
Casci, J. L. (DE)
Čejka, J. (CZ)
Spiecker, E. (DE)
Schwieger, W. (DE)Source Title Chemistry - A European Journal. - : Wiley - ISSN 0947-6539
Roč. 25, č. 63 (2019), s. 14430-14440Number of pages 11 s. Language eng - English Country DE - Germany Keywords ts-1 zeolites ; transport-properties ; catalytic performance ; micro ; oxidation ; framework ; oxide ; catalysis Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry Method of publishing Limited access Institutional support UFCH-W - RVO:61388955 UT WOS 000490313000001 EID SCOPUS 85074102156 DOI 10.1002/chem.201903287 Annotation The successful synthesis of hierarchically structured titanium silicalite-1 (TS-1) with large intracrystalline macropores by steam-assisted crystallisation of mesoporous silica particles is reported. The macropore topology was imaged in 3D by using electron tomography and synchrotron radiation-based ptychographic X-ray computed tomography, revealing interconnected macropores within the crystals accounting for about 30 % of the particle volume. The study of the macropore formation mechanism revealed that the mesoporous silica particles act as a sacrificial macropore template during the synthesis. Silicon-to-titanium ratio of the macroporous TS-1 samples was successfully tuned from 100 to 44. The hierarchically structured TS-1 exhibited high activity in the liquid phase epoxidation of 2-octene with hydrogen peroxide. The hierarchically structured TS-1 surpassed a conventional nano-sized TS-1 sample in terms of alkene conversion and showed comparable selectivity to the epoxide. The flexible synthesis route described here can be used to prepare hierarchical zeolites with improved mass transport properties for other selective oxidation reactions. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2020 Electronic address http://hdl.handle.net/11104/0302879
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