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SCM-25 :
SCM-25 : A Zeolite with Ordered Meso-cavities Interconnected by12x12x10-Ring Channels Determined by 3D Electron Diffraction br
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- Luo, Yi (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Fu, Wenhua (författare)
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- Wang, Bin, 1991- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Yuan, Zhiqing (författare)
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- Sun, Junliang, 1987- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Peking University, China
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- Zou, Xiaodong (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Yang, Weimin (författare)
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(creator_code:org_t)
- 2022-01-25
- 2022
- Engelska.
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Ingår i: Inorganic Chemistry. - : American Chemical Society (ACS). - 0020-1669 .- 1520-510X. ; 61:10, s. 4371-4377
- Relaterad länk:
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https://doi.org/10.1...
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Zeolites with large cavities that are accessible via wide pore windows are desirable but very rare. They have been dominantly used as catalysts in industry. Here we report a novel porous germanosilicate SCM-25, the zeolite structure containing ordered meso-cavities (29.9 × 7.6 × 6.0 Å3) interconnected by 10- and 12-ring channels. SCM-25 was synthesized as nanosized crystals by using a simple organic structure-directing agent (OSDA). Three-dimensional (3D) electron diffraction shows that SCM-25 crystallizes in the orthorhombic space group Cmmm with a = 14.62 Å, b = 51.82 Å, c = 13.11 Å, which is one of the zeolites with the largest unit cell dimensions. We demonstrate that 3D electron diffraction is a powerful technique for determining the complex structure of SCM-25, including the disorders and distributions of framework atoms silicon and germanium. SCM-25 has a high surface area (510 m2/g) and high thermal stability (700 °C). Furthermore, we propose a potential postsynthetic strategy for the preparation of zeolites with ordered meso-cavities by applying the ADOR (assembly–disassembly–organization–reassembly) approach.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
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- ref (ämneskategori)
- art (ämneskategori)
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