Multilayer structured MFI-type titanosilicate: Synthesis and catalytic properties in selective epoxidation of bulky molecules

作者：Wang, Jianggan; Xu, Le; Zhang, Kun; Peng, Honggen; Wu, Haihong; Jiang, Jin gang; Liu, Yueming; Wu, Peng^*

来源：Journal of Catalysis, 2012, 288: 16-23.

DOI：10.1016/j.jcat.2011.12.023

• Layered titanosilicate
• TS-1
• Ti-MCM-41
• Mesoporous material
• Epoxidation of alkenes
• tert-Butyl hydroperoxide

A lamellar titanosilicate (LTS-1) was hydrothermally synthesized by employing a bifunctional surfactant as the structure-directing agent (SDA). Highly crystalline LTS-1 was obtained at an optimal SDA/Si molar ratio of 0.04. As-synthesized LTS-1 possessed a multilayer structure, which was constructed from a collection of 2-nm zeolite nanosheets and interlayer SDA molecules. Removing the intercalated organic species induced irregular layer stacking to a certain extent, leading to intracrystal mesopores of ca. 3.2 nm in diameter. The catalytic performance of LTS-1 was investigated in the epoxidation of various bulky alkenes with tert-butyl hydroperoxide, cumene hydroperoxide, or aqueous H2O2. LTS-1 was more active than conventional titanosilicates for reactions involving bulky alkenes and oxidants, and it was immune to Ti leaching and irreversible deactivation.

• 出版日期2012-4
• 单位华东师范大学