4.8 Article

A 3D extra-large-pore zeolite enabled by 1D-to-3D topotactic condensation of a chain silicate

Journal

SCIENCE
Volume 379, Issue 6629, Pages 283-287

Publisher

AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.ade1771

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ZEO-3 is a highly stable pure silica zeolite with a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra. It has a higher specific surface area compared to other zeolites and metal-organic frameworks, and exhibits excellent performance for volatile organic compound abatement and recovery.
Zeolites are microporous silicates with a large 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. We report a new, highly stable pure silica zeolite called ZEO-3, which has a multidimensional, interconnected system of extra-large pores open through windows made by 16 and 14 silicate tetrahedra, the least dense polymorph of silica known so far. This zeolite was formed by an unprecedented one-dimensional to three-dimensional (1D-to-3D) topotactic condensation of a chain silicate. With a specific surface area of more than 1000 square meters per gram, ZEO-3 showed a high performance for volatile organic compound abatement and recovery compared with other zeolites and metal-organic frameworks.

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