Release Time:2025-06-03  Hits:

Date of Publication: 2022-10-04

Journal: 物理化学学报

Volume: 14

Issue: 10

Page Number: 906

ISSN: 1000-6818

Abstract: The influence of the content of titanium, the variety of the alkali and the amounts of the templates in the gels on the synthesis of the TS-1 zeolites prepared by means of tetrapropylammonium bromide (TPABr) as a template were investigated by H-1-->C-13 CP/MAS NMR, Si-29 MAS NMR, IR, XRD and element analysis techniques. The results showed that the structures of the resultant TS-1 zeolites were transferred from monoclinic symmetry to orthorhombic symmetry with the increase of the titanium content in the framework. The added alkali didn't act as a template in the synthesis of TS-1 zeolites, but the strong alkali conditions were of benefit to the incorporation of the titanium atoms into the lattices. When the molar ratios of TPABr/SiO2 in the gels varied from 0.05 to 0.25, the Ti content in the framework showed independence of the amounts of TPABr in gels.

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