Synthesis and Catalytic Activity of Sn-MFI Nanosheets for the Baeyer–Villiger Oxidation of Cyclic Ketones

作者：Helen Luo, Linh Bui, William R. Gunther, Elizabeth Min, Yuriy Román‐Leshkov · 发表于：ACS Catalysis · 年份：2012 · DOI：10.1021/cs300543z · 被引用次数：166 · 研究领域：Zeolite Catalysis and Synthesis、Mesoporous Materials and Catalysis、Catalysis for Biomass Conversion

Stannosilicate zeolites with nanosheet morphology and MFI topology (Sn-MFI-ns) are successfully synthesized with an amphiphilic organic structure-directing agent. Sn source, Si/Sn ratio, crystallization time and temperature impact framework Sn incorporation and nanosheet morphology. Optimal synthesis conditions generate Sn-MFI-ns with high crystallinity and isolated framework Sn sites. Nanosheets are ∼2 nm thick in the (010) direction, resulting in large intersheet mesopore volumes and external surface areas exceeding 430 m 2 /g. Unlike bulk Sn-MFI, Sn-MFI-ns is highly active in the Baeyer–Villiger oxidation of bulky cyclic ketones using hydrogen peroxide (H 2 O 2 ). Although Sn-MFI-ns and Sn-MCM-41 have comparable activity and oxidant efficiency, the nanosheets exhibit drastically higher thermal and hydrothermal stability.