Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (2): 275-282.DOI: 10.1016/S1872-2067(18)63026-8

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Hydrothermal synthesis and catalytic performance of bulky titanium silicalite-1 aggregates assembled by bridged organosilane

Li Chen, Teng Xue, Jian Ding, Hai Hong Wu, Kun Zhang, Peng Wu, Ming, Yuan He   

  1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemical and Molecular Engineering, East China Normal University, Shanghai 200062, China
  • Received:2017-10-08 Revised:2018-01-18 Online:2018-02-18 Published:2018-02-10
  • Contact: 10.1016/S1872-2067(18)63026-8
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21503081, 21503073, 21403070, 21707093), and the National Key Research and Development Program of China (2017YFA0403102).

Abstract:

A facile and effective method to synthesize TS-1 zeolite aggregates has been presented. The crystallization of silanized seeds and nanocrystallites led to large and irregular TS-1 zeolite aggregates ranging from 5 to 40 μm in size, based on the special sol-gel chemistry of bridged organosilane. Epoxidation of 1-hexene and cyclohexene was used as a probe reaction to investigate the catalytic performance of the resulting materials. These TS-1 zeolite aggregates possessed both the conventional nanoparticle properties of TS-1 zeolites and variable surface hydrophilic/hydrophobic features, which enhanced the catalytic properties of hydroperoxides for alkene epoxidation. Moreover, the large aggregates effectively simplified the separation procedure during preparation and catalytic reactions.

Key words: Bridged organosilane, TS-1 seeds, TS-1 nanocrystallites, Zeolite aggregation, Alkene epoxidation