Synthesis and characterisation of hierarchically structured titanium silicalite-1 zeolites with large intracrystalline macropores

Weissenberger T, Leonhardt R, Apeleo Zubiri B, Pitínová-Štekrová M, Sheppard TL, Reiprich B, Bauer J, Dotzel R, Kahnt M, Schropp A, Schroer CG, Grunwaldt J, Casci JL, Čejka J, Spiecker E, Schwieger W (2019)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2019

Journal

Chemistry - A European Journal Wiley

DOI: 10.1002/chem.201903287

Abstract


We report the successful synthesis of hierarchically structured titanium silicalite-1 (TS-1) with large intracrystalline macropores by steam-assisted crystallisation of mesoporous silica particles. The macropore topology was imaged in 3D 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.


Authors with CRIS profile

Tobias Weissenberger Lehrstuhl für Chemische Reaktionstechnik Rainer Leonhardt Lehrstuhl für Chemische Reaktionstechnik Benjamin Apeleo Zubiri Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Bastian Reiprich Lehrstuhl für Chemische Reaktionstechnik Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Wilhelm Schwieger Professur für Technische Chemie (Reaktionstechnik)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Johnson Matthey Public Limited Company GB United Kingdom (GB) Univerzita Karlova v Praze / Charles University in Prague CZ Czech Republic (CZ) Johnson Matthey Catalysts (Germany) GmbH DE Germany (DE)

How to cite

APA:

Weissenberger, T., Leonhardt, R., Apeleo Zubiri, B., Pitínová-Štekrová, M., Sheppard, T.L., Reiprich, B.,... Schwieger, W. (2019). Synthesis and characterisation of hierarchically structured titanium silicalite-1 zeolites with large intracrystalline macropores. Chemistry - A European Journal. https://dx.doi.org/10.1002/chem.201903287

MLA:

Weissenberger, Tobias, et al. "Synthesis and characterisation of hierarchically structured titanium silicalite-1 zeolites with large intracrystalline macropores." Chemistry - A European Journal (2019).

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