Effect of relative humidity on the interlayer spacing of phosphate intercalated Mg, Al layered double hydroxide (hydrotalcite-like) crystals

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-10-04 DOI:10.1111/jace.20178

Titus Reed, Nichole Wonderling, Juan Pablo Gevaudan, John C. Mauro

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Abstract

The availability of water and the type of interlayer anions present affect the arrangement and interlayer spacing of layered double hydroxide (LDH). A systematic study of the effect of relative humidity (RH) on the basal spacing of phosphate intercalated, magnesium aluminum LDHs (MgAl–PO₄ LDH) was conducted, confirming that MgAl-PO₄ LDH exhibit distinct interlayer spacing corresponding to separate low- and high-hydration states produced when exposed to low and high humidity conditions. The transition from the low- to high-hydration form begins when RH exceeds 33% and is accompanied by the transition from one to two interlayers of water. An improved understanding of the effect of RH on MgAl–PO₄ LDHs will enable more accurate atomistic modeling and experimental characterization of MgAl–PO₄ LDHs and may lead to improvements in the tunability of MgAl-PO₄ LDHs for commercial applications such as slow-release fertilizer.

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相对湿度对磷插层Mg， Al层状双氢氧化物（类水滑石）晶体层间间距的影响

水的可用性和层间阴离子的类型影响层状双氢氧化物（LDH）的排列和层间间距。系统研究了相对湿度（RH）对磷酸盐插层镁铝LDH （MgAl-PO4 LDH）基间距的影响，证实了MgAl-PO4 LDH在低湿度和高湿条件下具有明显的层间距，对应于不同的低水化状态和高水化状态。当相对湿度超过33%时，从低水化形态向高水化形态转变，并伴随着从一层水到两层水的过渡。更好地了解RH对MgAl-PO4 LDHs的影响，将使MgAl-PO4 LDHs的原子建模和实验表征更加准确，并可能导致MgAl-PO4 LDHs在缓释肥料等商业应用中的可调性得到改善。

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.