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Yunxia Wang, Yifa Du, Xu Zhao, Yanan Wu, Fayan Zhu, Guosheng Shi, Yongquan Zhou, Min Wang, Hydration structure of magnesium ion at graphene interface, Chemistry Letters, Volume 54, Issue 4, April 2025, upaf048, https://doi.org/10.1093/chemle/upaf048
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Abstract
Aqueous solutions near interfaces exhibit altered properties, impacting ion selectivity, reaction pathways, and nucleation. This study investigates unsaturated MgCl2 and Mg(NO3)2 solutions at reduced graphene oxide interface using X-ray diffraction. The results demonstrate limited crystallization, with distinct interfacial crystal behaviors observed for Mg2+ in comparison to Ca2+. Molecular analysis reveals the mechanism that the stable hydration layer of Mg2+ blocks electron migration from graphene. These findings provide insights for preparing carbon-based nanomaterials for ion separation in brine.
