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Erschienen in: Journal of Materials Science 24/2020

27.04.2020 | Chemical routes to materials

Interfacial effects between carbon nanotube templates and precursors on fabricating a wall-crystallized hierarchical pore system in zeolite crystals

verfasst von: Lichen Zhang, Xiaobo Sun, Meng Pan, Xiaona Yang, Yanchao Liu, Jinghui Sun, Quanhua Wang, Jiajun Zheng, Yan Wang, Jinghong Ma, Wenlin Li, Ruifeng Li

Erschienen in: Journal of Materials Science | Ausgabe 24/2020

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Abstract

The failure in some direct synthesis of hierarchical zeolite with a hard- or soft-templating method would be caused by the brittle binding forces between the templates and zeolite precursors or frameworks. In present work, high-quality hierarchically porous ZSM-5 with crystalline pore walls is synthesized by using hydroxylated carbon nanotubes (CNTs) as templates. Mesopores structure with a size of about 10–35 nm similar to the diameters of the CNTs template is successfully fabricated in the as-synthesized ZSM-5 zeolite. The structural and textural properties of the as-synthesized samples are revealed by characterization of X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, in situ infrared spectroscopy of pyridine, temperature-programmed desorption of ammonia (NH3-TPD), N2 adsorption–desorption, and nuclear magnetic resonance spectroscopy in details. Catalytic cracking of tri-isopropylbenzene is chosen as a probe reaction so as to explore the catalytic performances of the hierarchical zeolite because of its notably increased external surfaces resulted from the created hierarchical pore system. A hierarchically cracking manner of bulky reactants is found over the as-synthesized the meso-zeolite ZSM-5.

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Metadaten
Titel
Interfacial effects between carbon nanotube templates and precursors on fabricating a wall-crystallized hierarchical pore system in zeolite crystals
verfasst von
Lichen Zhang
Xiaobo Sun
Meng Pan
Xiaona Yang
Yanchao Liu
Jinghui Sun
Quanhua Wang
Jiajun Zheng
Yan Wang
Jinghong Ma
Wenlin Li
Ruifeng Li
Publikationsdatum
27.04.2020
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 24/2020
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-04708-1

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