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Article Dans Une Revue Microporous and Mesoporous Materials Année : 2019

Microwave-green synthesis of AlPO-n and SAPO-n (n = 5 and 18) nanosized crystals and their assembly in layers

Résumé

Green synthesis of nanosized AlPO-n and SAPO-n (n = 5 and 18) crystals with AFI and AEI type structures from non-reacted precursor suspensions with an essential chemical compensation is presented. The crystallization of both materials was accomplished within few minutes (5-18 minutes) instead of several days by replacing the conventional with microwave heating. The nanosized AlPO-n and SAPO-n (n = 5 and 18) crystals were stabilized in coating suspensions and deposited in layers on silicon wafers. It is shown that the AFI-type crystals (one-dimensional pores with a diameter of 0.73 nm) were primarily oriented with (001) direction perpendicular to the substrate, while the AEI-type crystals (three-dimensional pores with a diameter of 0.38 nm) were randomly oriented. The relationship between the crystal orientation and the adsorption behavior of the AFI and AEI layers toward water was studied by GI-XRD and operando IR spectroscopy.

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Chimie
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Dates et versions

hal-02409922 , version 1 (26-11-2020)

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Eng-Poh Ng, Hussein Awala, Sarah Komaty, Svetlana Mintova. Microwave-green synthesis of AlPO-n and SAPO-n (n = 5 and 18) nanosized crystals and their assembly in layers. Microporous and Mesoporous Materials, 2019, 280, pp.256-263. ⟨10.1016/j.micromeso.2019.02.016⟩. ⟨hal-02409922⟩
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