Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 15, Issue 49, Pages 57144-57152Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.3c13678
Keywords
two-dimensional materials; montmorillonite; membranes; water treatment; stability; ion transport
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In this study, 2D montmorillonite (MMT) membranes were fabricated using alkanediamines as cross-linkers, which provided controllable interlayer spacing and enhanced interlamellar connections, resulting in improved membrane stability and tunable ion transport properties.
Membranes incorporating two-dimensional (2D) materials have shown great potential for water purification and energy storage and conversion applications. Their ordered interlayer galleries can be modified for their tunable chemical and structural properties. Montmorillonite (MMT) is an earth-abundant phyllosilicate mineral that can be exfoliated into 2D flakes and reassembled into membranes. However, the poor water stability and random interlayer spacing of MMT caused by weak interlamellar interactions pose challenges for practical membrane applications. Herein, we demonstrate a facile approach to fabricating 2D MMT membranes with alkanediamines as cross-linkers. The incorporation of diamine molecules of different lengths enables controllable interlayer spacing and strengthens interlamellar connections, leading to tunable ion transport properties and boosted membrane stability in aqueous environments.
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