Electrochemical Synthesis of Zeolite Coatings with Controlled Crystal Polymorphism and Self-Regulating Growth

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Author(s)Warty, Akash
Author(s)Chen, Amy
Author(s)Tran, Dat T.
Author(s)Kraus, Harrison
Author(s)Woehl, Taylor J.
Author(s)Liu, Dongxia
Date Accessioned2025-01-03T20:55:13Z
Date Available2025-01-03T20:55:13Z
Publication Date2024-12-10
DescriptionThis article was originally published in JACS Au. The version of record is available at: https://doi.org/10.1021/jacsau.4c00691. This publication is licensed under CC-BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/). Copyright © 2024 The Authors. Published by American Chemical Society.
AbstractZeolite coatings are studied as molecular sieves for membrane separation, membrane reactors, and chemical sensor applications. They are also studied as anticorrosive films for metals and alloys, antimicrobial and hydrophobic films for heating, ventilation, and air conditioning, and dielectrics for semiconductor applications. Zeolite coatings are synthesized by hydrothermal, ionothermal, and dry-gel conversion approaches, which require high process temperatures and lengthy times (ranging from hours to days). Here, we report the first zeolite coatings synthesized via electrochemical deposition on a cathodic electrode, with controlled crystal polymorphism achieved within subhourly duration. We demonstrate this approach by developing sodium zeolite (e.g., sodalite (SOD), NaA (LTA), and Linde Type N (LTN)) coatings on a titanium electrode and extending the synthesis method to porous stainless steel. The coating morphology and crystallinity depend on the temperature, time, and applied current. The coating thickness is independent of the applied current, showing the presence of a self-regulating mechanism to ensure a uniform coating thickness across the metal surface. The electrochemical zeolite growth mechanism was elucidated with high-resolution transmission electron microscopy, and applications of the resultant zeolite coatings for oil/water separation and ethanol/water pervaporation were exploited. Electrochemical synthesis represents a novel, simple, fast, and environmentally friendly approach to preparing zeolite coatings. It can potentially be generalized for developing zeolite materials with diverse framework structures, morphologies, and orientations for substrates with complicated geometries.
SponsorThe authors acknowledge the funding support from the National Science Foundation (NSF-PFI-MCA-2220588) and Department of Energy (DESC0023357). A portion of this work was sponsored by the U.S. Army Combat Capabilities Development Command - Army Research Laboratory and was accomplished under an ARL Cooperative Research and Development Agreement (CRADA 14-052-22). T.J.W. and A.C. acknowledge support from the Petroleum Research Fund (#61111-DNI10). This research used instruments in the Advanced Materials Characterization Lab and W. M. Keck Center for Advanced Microscopy and Microanalysis at the University of Delaware.
CitationWarty, Akash, Amy Chen, Dat T. Tran, Harrison Kraus, Taylor J. Woehl, and Dongxia Liu. “Electrochemical Synthesis of Zeolite Coatings with Controlled Crystal Polymorphism and Self-Regulating Growth.” JACS Au 4, no. 12 (December 23, 2024): 4769–79. https://doi.org/10.1021/jacsau.4c00691.
ISSN2691-3704
URLhttps://udspace.udel.edu/handle/19716/35690
Languageen_US
PublisherJACS Au
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
Keywordselectrochemical deposition
Keywordszeolite crystallization
Keywordscrystal polymorphism
Keywordssodium zeolite
Keywordszeolite coating
TitleElectrochemical Synthesis of Zeolite Coatings with Controlled Crystal Polymorphism and Self-Regulating Growth
TypeArticle
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