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IDM-1, a New Zeolite with Intersecting Medium and Extra-Large Pores Built as an Expansion of Zeolite MFI

preprint
submitted on 02.03.2020 and posted on 03.03.2020 by Luis Angel Villaescusa, Jian Li, Zihao Gao, Junliang Sun, Miguel Camblor

IDM-1 is a new silica zeolite with an ordered and well-defined framework constructed by alternating pentasil layers and interrupted layers, giving rise to an intersecting system of straight medium pores and undulating extra-large lobed pores. This unique structure was solved by rotation electron diffraction and refined against synchrotron powder X-ray diffraction data. Despite the presence of both Si(OSi)3(OH) and Si(OSi)2(OH)2 sites, this new zeolite presents high thermal stability, withstanding calcination even to 1000ºC. The location of defects at specific sites of the structure results in alternating hydrophobic SiO2 and hydrophilic SiO(2-x)(OH)2x intracrystalline regions. This peculiar combination of intersecting medium and extra-large pores and alternating regions of different chemical character may provide this zeolite with unique catalytic properties.

Funding

MAT2015-71117-R (MINECO/FEDER, UE)

RTI2018-101599-B-C22 (MCUI/AEI/FEDER, UE)

National Natural Science Foundation of China, No. 21871009

National Natural Science Foundation of China, No. 21621061

National Natural Science Foundation of China, No. 21527803

National Natural Science Foundation of China, No. 21471009

Swedish Research Council (VR)

Knut and Alice Wallenberg Foundation (KAW)

Generalitat Valenciana (project PROMETEO/2018/024)

History

Email Address of Submitting Author

macamblor@icmm.csic.es

Institution

Consejo Superior de Investigaciones Científicas

Country

Spain

ORCID For Submitting Author

0000-0001-9591-3432

Declaration of Conflict of Interest

L.A. Villaescusa has filed a patent application on zeolite IDM-1

Exports