Accelerated discovery of stable, extra-large-pore nano zeolites with micro-electron diffraction.
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| Title: | Accelerated discovery of stable, extra-large-pore nano zeolites with micro-electron diffraction. |
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| Authors: | Ma, Chao, Zhang, Zhenghan, Zhang, Mengdi, Tian, Xudong, Lin, Cong, Han, Lei, Li, Guangchao, Lo, Benedict Tsz Woon, Yung, Ka-Fu, Song, Haitao, Lin, Wei, Camblor, Miguel A., Xu, Le, Li, Jian |
| Source: | Science. 6/26/2025, Vol. 388 Issue 6754, p1417-1421. 5p. |
| Subjects: | Zeolites, Aluminum silicates, Electron diffraction, Gasoline, X-ray diffraction |
| Abstract: | Stable zeolites with extra-large pores and nano dimensions that are capable of processing large molecules are in high demand but have been difficult to produce. Their complex structures and nanoscale crystal sizes present challenges for analysis using conventional x-ray diffraction techniques, leading to inefficiencies in material development. We report NJU120-1 and NJU120-2, two robust and fully connected aluminosilicate nano zeolites featuring interconnected channel systems with extra-large 22-ring pores. NJU120-1 is a nanosheet with only about 8-nanometer thickness, corresponding to 1.5 unit cells, and NJU120-2 is a nanorod with 50 by 250 nanometer dimensions. Their synthesis optimization was greatly accelerated through rapid structure determination with MicroED, revealing their multidimensional pore structures. Their very large largest-free-sphere diameters of approximately 1.2 nanometers coupled with nano morphologies enabled catalytic cracking of large molecules. Editor's summary: Microcrystal electron diffraction enabled rapid screening of combinatorial product mixtures for synthesis of two extra-large pore (ELP) nanosized aluminosilicate zeolites. Ma et al. screened 16 precursor gel compositions under two different hydrothermal processing conditions. After synthesis optimization, they characterized these ELP zeolites as having 22-membered pores with free-sphere diameters of about 1.2 nanometers. These nanozeolites efficiently processed heavy petroleum fractions (commercial vacuum gas oil) into diesel and gasoline fuels. —Phil Szuromi [ABSTRACT FROM AUTHOR] |
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| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | Stable zeolites with extra-large pores and nano dimensions that are capable of processing large molecules are in high demand but have been difficult to produce. Their complex structures and nanoscale crystal sizes present challenges for analysis using conventional x-ray diffraction techniques, leading to inefficiencies in material development. We report NJU120-1 and NJU120-2, two robust and fully connected aluminosilicate nano zeolites featuring interconnected channel systems with extra-large 22-ring pores. NJU120-1 is a nanosheet with only about 8-nanometer thickness, corresponding to 1.5 unit cells, and NJU120-2 is a nanorod with 50 by 250 nanometer dimensions. Their synthesis optimization was greatly accelerated through rapid structure determination with MicroED, revealing their multidimensional pore structures. Their very large largest-free-sphere diameters of approximately 1.2 nanometers coupled with nano morphologies enabled catalytic cracking of large molecules. Editor's summary: Microcrystal electron diffraction enabled rapid screening of combinatorial product mixtures for synthesis of two extra-large pore (ELP) nanosized aluminosilicate zeolites. Ma et al. screened 16 precursor gel compositions under two different hydrothermal processing conditions. After synthesis optimization, they characterized these ELP zeolites as having 22-membered pores with free-sphere diameters of about 1.2 nanometers. These nanozeolites efficiently processed heavy petroleum fractions (commercial vacuum gas oil) into diesel and gasoline fuels. —Phil Szuromi [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adv5073 |
