Preparation of Ti incorporated Y zeolites by a post-synthesis method under acidic conditions and their catalytic properties

Ti incorporated Y zeolites were prepared by post-synthesis treatment of a dealuminated USY zeolite with an aqueous solution of (NH4)2TiF6, and characterized by XRD, 27Al MAS NMR, FT-IR, SEM, TEM, UV–vis, and XANES techniques. The results showed that Ti species were tetrahedrally incorporated into the hydroxyl nests in the zeolite framework under acidic conditions. Furthermore, the catalytic performance of Ti incorporated Y zeolites in epoxidation of cycloalkenes using an aqueous solution of hydrogen peroxide was higher than that of TS-1 zeolite.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (128 K)Download as PowerPoint slideResearch highlights▶ Ti incorporated Y zeolites were prepared by post-synthesis under acidic conditions. ▶ The incorporated Ti species in Ti-USY zeolite framework were tetrahedral. ▶ Ti-USY zeolite shows the higher catalytic performance in epoxidation of cycloalkenes.