Materials Chemistry

A 3D Extra-Large Pore Zeolite Enabled by 1D-to-3D Topotactic Condensation of a Chain Silicate

Authors

Abstract

Zeolites are microporous silicates that find an ample variety of applications as catalysts, adsorbents, and cation exchangers. Stable silica-based zeolites with increased porosity are in demand to allow adsorption and processing of large molecules, but challenge our synthetic ability. Here we report a novel, highly stable pure silica zeolite, ZEO-3, with a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 SiO4 tetrahedra, which is the less dense polymorph of silica known so far. With a specific surface area over 1000 m 2 /g, ZEO-3 shows an extraordinary performance for Volatile Organic Compounds abatement and recovery. This zeolite is formed by a 1D-to-3D topotactic condensation of a chain silicate, an unprecedented, never predicted approach.

Version notes

Catalysis needs further studies.

Content

Thumbnail image of ZEO-2-3-preprint.pdf

Supplementary material

Thumbnail image of ZEO-2-3-SM-preprint.pdf
Supplementary Information for A 3D Extra-Large Pore Zeolite Enabled by 1D-to-3D Topotactic Condensation of a Chain Silicate
Additional characterization (methods, SEM, cRED, difference e- density maps, 13C, 31P, 1H NMR, PXRD study of the condensation, TG, HRSTEM, energy vs density, FTIR, crystallographic data, topology analysis, framework density of silica polymorphs, catalitic results)