Zholobenko, V ORCID: https://orcid.org/0000-0002-6024-0503, Al-Ani, A, Haslam, J, Mordvinova, N, Lebedev, OI, Vicente, A and fernandez, C (2019) Synthesis of Nanostructured Catalysts by Surfactant-Templating of Large-Pore Zeolites. Nanoscale Advances.

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Abstract

Zeolites and related crystalline molecular sieves are utilised in a wide range of reactions and processes due to their regular microporous structure, strong acidity, shape selectivity and ion-exchange properties. However, their practical applications can be limited by the small size of the channels and cavities of the microporous structures, and therefore, a great deal of effort have been devoted to enhancing the transport of large-sized molecules in the host pores. Several commercially available zeolites, including faujasite (FAU), mordenite (MOR), beta (BEA), ZSM-5 (MFI) and zeolite L (LTL) have been exposed to a variety of acid and base treatments in the presence of a surfactant (cetyltrimethyl ammonium bromide, CTAB), which led to the controlled introduction of intracrystalline mesoporosity. A detailed characterisation of the obtained mesostructured zeolites has been carried out using FTIR spectroscopy, high resolution TEM, XRD, N2 adsorption, 29Si and 27Al MAS NMR. This work demonstrates a successful application of the supramolecular templating approach for generating tuneable mesoporosity in a range of zeolites possessing 12-membered ring channels, which has been applied to zeolite L for the first time, thus producing hierarchical meso-microporous materials with improved accessibility of active sites and enhanced catalytic performance in dealkylation of tri-isopropylbenzene.

Item Type: Article
Additional Information: This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Royal Society of Chemistry at http://dx.doi.org/10.1039/C9NA00004F - please refer to any applicable terms of use of the publisher.
Uncontrolled Keywords: surfactant-templating, hierarchical zeolites, intracrystalline mesoporosity, 12-membered ring channels
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 28 Feb 2019 11:19
Last Modified: 23 May 2019 14:48
URI: http://eprints.keele.ac.uk/id/eprint/5944

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