HSIL-Based Synthesis of Ultracrystalline K,Na-JBW, a Zeolite Exhibiting Exceptional Framework Ordering and Flexibility.

ABSTRACT: A reproducible synthesis strategy for ultracrystalline K,Na-aluminosilicate JBW zeolite is reported. The synthesis uses a Na-based hydrated silicate ionic liquid (HSIL) as a silicon source and gibbsite as the aluminum source. ²⁷Al and ²³Na NMR spectra exhibit crystalline second-order quadrupole patterns in the hydrated as well as dehydrated states and distinct resonances for different T-sites demonstrating an exceptional degree of order of the elements of the JBW framework, observed for the first time in a zeolite. Detailed structural analysis via NMR crystallography, combining powder X-ray diffraction and solid-state NMR of all elements (²⁷Al, ²⁹Si, ²³Na, ³⁹K, and ¹H), reveals remarkable de- and rehydration behav

SUBMITTER: Asselman K 

PROVIDER: S-EPMC9404536 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature