Regulation of TS-1 Zeolite Morphology by Crystallization Modifiers to Boost the Oxidative Reactions

TS-1 zeolite is a heterogeneous catalyst renowned for its remarkable catalytic performance in oxidation processes, tailoring its morphology is crucial for targeted reactions. Herein, we present a facile and versatile method to regulate the orientation-dependent growth behavior of TS-1 zeolite by utilizing crystal growth modifiers (CGMs). Nanosheet TS-1 zeolites with short b-axis dimension was synthesized by using N,N-dimethylformamide (DMF) as CGMs, while thin-layer assembles in c-axis dimension with hierarchical structure was prepared in the presence of N,N-dimethylacetamide (DMA) or N,N-dimethylpropionamide (DMP) as CGMs. Study reveals that the directional adsorption of different CGMs on specific crystal facets of zeolite is the core reason for modulating the morphology of TS-1. Diverse TS-1 morphologies are suitable for different oxidation reactions: nanosheets enhance selectivity in 1-hexene epoxidation, while thin-layer assembles show excellent activity and stability in dibenzothiophene oxidative desulfurization. This work offers more insights into customizing zeolite properties and optimizing their catalytic performance.