Shielding effect-engineered single-crystalline Ti-rich nanosized aggregated TS-1 for 1-hexene epoxidation

Zong, Ze, Deng, Xuliang, Lin, Dong, Xu, Yang, He, Qiuming, Ma, Zhe, Chen, De, Yang, Chaohe and Feng, Xiang 2024. Shielding effect-engineered single-crystalline Ti-rich nanosized aggregated TS-1 for 1-hexene epoxidation. AIChE Journal 70 (11) , e18566. 10.1002/aic.18566 Item availability restricted.

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Abstract

Titanosilicate with H2O2 stands out as a highly consequential oxidized catalytic system, prized for its user-friendly operation, mild conditions, and eco-friendly attributes. However, a synthesis strategy for large surface area titanosilicalites approaching the theoretical lowest Si/Ti ratio without extra-framework Ti species remains an ongoing challenge. In this study, we successfully synthesized single-crystalline Ti-rich nanosized aggregated TS-1 by shielding effect with a Si/Ti polymer. This polymer demonstrated effectiveness in restraining TiO2 species by regulating the proximity of Si/Ti species in Ti-Diol-Si polymers. The polymer not only facilitated the synthesis of single-crystalline Ti-rich TS-1 but also exploited the chain length of PEG, functioning as a shielding cage by hydrogen bonds, to synthesize nanosized aggregated TS-1 (TS-1-PEG400). This TS-1-PEG400 exhibited superior conversion (~60%), selectivity (~90%), and stability in 1-hexene epoxidation. This study not only establishes a synthesis pathway for Ti-rich TS-1 but also holds the potential to enhance related industrial oxidation reactions involving titanosilicates and H2O2.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Publisher:	Wiley
ISSN:	0001-1541
Date of First Compliant Deposit:	18 October 2024
Date of Acceptance:	28 July 2024
Last Modified:	07 Nov 2024 04:30
URI:	https://orca.cardiff.ac.uk/id/eprint/173127

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