Ethanol-assisted synthesis of titanium-rich TS-1 zeolite: a new hexa-coordinated Ti site for efficient propylene epoxidation.

ABSTRACT: TS-1 (MFI) zeolites are widely utilized in various green oxidation reactions, such as alkene epoxidation and alcohol oxidation. To elevate their catalytic efficacy, strategies such as increasing Ti content or constructing highly active Ti species within zeolite are commonly employed. Here, we synthesized a titanium-rich TS-1 zeolite (Si/Ti ratio of 25.6) with an unprecedented hexa-coordinated Ti species, demonstrating high activity in propylene epoxidation, achieved by utilizing ethanol as a crystal growth modifier through a two-step crystallization strategy. The introduced ethanol regulated the crystallization pathway from the classical to the non-classical route, and enhanced the incorporation of Ti within the TS-1 framework by balancing the insertion of Ti and the crystal growth. The he

SUBMITTER: Hao D 

PROVIDER: S-EPMC11808564 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature