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

08 September 2022, Version 3
This content is a preprint and has not undergone peer review at the time of posting.


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.


topotactic condensation
electron crystallography
High Resolution Scanning Transmission Electron Diffraction
VOCs abatement
Large molecule adsorption
Extra-large pores
low density silica polymorph
Stable Zeolite

Supplementary materials

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)


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