Ta(V)-Single Site BEA Zeolite by Two-Step Postsynthesis Method: Preparation and Characterization

Stanislaw Dzwigaj (1) , Yannick Millot (1) , Michel Che (1)

1 LRS - Laboratoire de Réactivité de Surface

Ta(1.0)SiBEA and Ta(2.0)SiBEA zeolites are prepared by a two-step postsynthesis method involving first the creation of vacant T-atom sites associated with silanol groups by dealumination of TEABEA zeolite with nitric acid and then the impregnation of the resulting SiBEA zeolite with tantalum ethoxide (Ta(OC2H5)(5) precursor. This postsynthesis procedure allows to incorporate Ta into the BEA framework as isolated mononuclear Ta(V) ions and to obtain Ta(V)-single site BEA zeolite as evidenced by XRD, Si-29 MAS NMR, H-1-Si-29 CP MAS NMR, IR, H-1 MAS NMR, DR UV-Vis.

Keywords: bea; ta; zeolite; single site; h-1; si-29; xrd; nmr; cp mas; ir; dr uv-vis; supported tantalum oxide; beta-zeolite; molecular-sieves; thin-films; oxidation; catalysts; epoxidation; surface; ftir

Domains: Catalysis

Stanislaw Dzwigaj, Yannick Millot, Michel Che. Ta(V)-Single Site BEA Zeolite by Two-Step Postsynthesis Method: Preparation and Characterization. Catalysis Letters, 2010, 135 (3-4), pp.169-174. ⟨10.1007/s10562-010-0284-5⟩. ⟨hal-00604713⟩