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Issue 6, 2016
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Amino acid mediated mesopore formation in LTA zeolites

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Abstract

Mesoporous LTA zeolites have been hydrothermally synthesized by using amino acids as a mesoporogen. Amino acids of carnitine, lysine, or their salt derivatives were able to generate disordered mesopores of 10–20 nm within single crystalline LTA zeolites. Unlike other mesopore generating templates such as surfactants or polymers, the amino acid templates could be easily removed by washing with water, eliminating the energy-intensive calcination step. A possible crystallization process involving three-dimensional assembly of amino acid templates via hydrogen bonding and electrostatic interaction was proposed, as it was found that hydrogen bonding is crucial in hierarchical structure generation, and that hydroxyl group shielded acetyl carnitine yielded no mesopores. The obtained hierarchically mesoporous LTA zeolites exhibited a remarkably higher adsorption capacity (264 mg g−1) for catalase enzyme, and retained greater enzyme activity (>90%) than did conventional LTA.

Graphical abstract: Amino acid mediated mesopore formation in LTA zeolites

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Publication details

The article was received on 03 Dec 2015, accepted on 18 Jan 2016 and first published on 18 Jan 2016


Article type: Paper
DOI: 10.1039/C5TA09860B
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2016,4, 2305-2313
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    Amino acid mediated mesopore formation in LTA zeolites

    Z. Chen, J. Zhang, B. Yu, G. Zheng, J. Zhao and M. Hong, J. Mater. Chem. A, 2016, 4, 2305
    DOI: 10.1039/C5TA09860B

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