Natural and synthetic layered hydroxide salts (LHS): Recent advances and application perspectives emphasizing catalysis

IF 9.1 2区 化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR Progress in Solid State Chemistry Pub Date : 2021-12-01 DOI:10.1016/j.progsolidstchem.2021.100335
Shirley Nakagaki , Guilherme Sippel Machado , João Felipe Stival , Everton Henrique dos Santos , Gabriel Machado Silva , Fernando Wypych
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引用次数: 11

Abstract

Layered hydroxide salts (LHS) are synthetic and natural materials with the general chemical composition M2+(OH)2−x(Am)x/m (M2+ is a divalent cation, normally Mg2+, Ni2+, Zn2+, Ca2+, Cd2+, Co2+or Cu2+, and (Am)x/m·nH2O is a hydrated counter-ion). In most of the cases, the LHS structures are based on the modification of the layered magnesium hydroxide-like structure (brucite, Mg(OH)2), in which part of the structural hydroxide groups (OH) from the Mg2+centered octahedra sharing edges are replaced by water molecules or anions. This process creates a net positive charge in the layers, which needs to be compensated with the intercalation/grafting of hydrated anions. Despite LHS versatility and having great potential for academic and industrial applications due to the variable chemical compositions, structures, and properties, this material is less explored in the literature. In the present review, the structures of the majority of the LHS materials are described and their potential applications are discussed, emphasizing their usage as supports for metalloporphyrins and utilization in different catalytic reactions.

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天然和合成层状氢氧化物盐(LHS):以催化为重点的研究进展及应用前景
层状氢氧化物盐(LHS)是一种合成和天然材料,其化学成分一般为M2+(OH)2−x(Am−)x/m (M2+为二价阳离子,通常为Mg2+、Ni2+、Zn2+、Ca2+、Cd2+、Co2+或Cu2+, (Am−)x/m·nH2O为水合反离子)。在大多数情况下,LHS结构是基于层状的类氢氧化镁结构(水镁石,Mg(OH)2)的改性,其中部分来自Mg2+中心的共用边的八面体结构羟基(OH -)被水分子或阴离子取代。这个过程在层中产生净正电荷,这需要用水合阴离子的插入/接枝来补偿。尽管LHS具有多功能性,并且由于其化学成分、结构和性质的变化,在学术和工业应用方面具有巨大的潜力,但这种材料在文献中很少被探索。本文介绍了大多数LHS材料的结构,并对其应用前景进行了讨论,重点介绍了它们作为金属卟啉载体的用途及其在不同催化反应中的应用。
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来源期刊
Progress in Solid State Chemistry
Progress in Solid State Chemistry 化学-无机化学与核化学
CiteScore
14.10
自引率
3.30%
发文量
12
期刊介绍: Progress in Solid State Chemistry offers critical reviews and specialized articles written by leading experts in the field, providing a comprehensive view of solid-state chemistry. It addresses the challenge of dispersed literature by offering up-to-date assessments of research progress and recent developments. Emphasis is placed on the relationship between physical properties and structural chemistry, particularly imperfections like vacancies and dislocations. The reviews published in Progress in Solid State Chemistry emphasize critical evaluation of the field, along with indications of current problems and future directions. Papers are not intended to be bibliographic in nature but rather to inform a broad range of readers in an inherently multidisciplinary field by providing expert treatises oriented both towards specialists in different areas of the solid state and towards nonspecialists. The authorship is international, and the subject matter will be of interest to chemists, materials scientists, physicists, metallurgists, crystallographers, ceramists, and engineers interested in the solid state.
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