Journal ArticleDOI
Synthesis of anionic clay minerals (mixed metal hydroxides, hydrotalcite)
TLDR
A number of approaches to the synthesis of a class of anionic clay minerals (M a 2+ M b 3+ (OH) 2 a +2 b (X − ) 2 b · x H 2 O; M 2+ = Mg, Ni, Co, Zn, Cu, etc., M 3+ = Al, Cr, Fe, Sc; m 2+ /M 3+ ∼ 1−5; X − = water and base stable anion; x = 0−6) have been sumarized.About:
This article is published in Solid State Ionics.The article was published on 1986-12-01. It has received 772 citations till now. The article focuses on the topics: Qualitative inorganic analysis & Aqueous solution.read more
Citations
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Hydrotalcite-type anionic clays: Preparation, properties and applications.
Journal ArticleDOI
Layered double hydroxides (LDH) intercalated with metal coordination compounds and oxometalates
TL;DR: In this paper, the synthesis, properties and applications of layered double hydroxides (LDHs) are reviewed, also known as anionic clays or hydrotalcite-like materials containing intercalated anions constituted by metal complexes or oxometalates.
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Preparation and catalytic properties of cationic and anionic clays
TL;DR: In this paper, the structure, main properties and preparation methods of cationic and anionic clays are reviewed in light of the versatility and potential of these materials, which may be useful tools in the move towards establishing environmentally friendly technologies.
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Synthesis, characterization and applications of layered double hydroxides containing organic guests
Steven P. Newman,William Jones +1 more
TL;DR: The use of layered inorganic solids as host materials for the creation of inorganic-organic host-guest supramolecular structures is of increasing interest as mentioned in this paper, and potential applications of organo-LDHs in the areas of catalysis, sorption, photochemistry and electrochemistry are outlined.
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Clays and catalysis: a promising future
TL;DR: The main properties of cationic and anionic clays as well as their role in catalysis are discussed in this paper in light of the versatility and potential of these materials, which may be very useful tools in the move towards establishing environmentally friendly technologies.
References
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Anion-exchange properties of hydrotalcite-like compounds
TL;DR: Ion exchange isotherms between hydrotalcite-like (HT) ions were determined and the spacing and width of the 003 reflection were measured as a function of HT composition as mentioned in this paper.
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The Syntheses of Hydrotalcite-Like Compounds and Their Structures and Physico-Chemical Properties I: The Systems Mg2+-Al3+-NO3-, Mg2+-Al3+-Cl-, Mg2+-Al3+-ClO4-, Ni2+-Al3+-Cl- and Zn2+-Al3+-Cl-
TL;DR: The basic salts of this system were prepared and their structures and physico-chemical properties were studies by electron microscopy, chemical analysis, X-ray powder diffraction, thermal analysis, and acidity-basicity measurements as mentioned in this paper.
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Physico-chemical properties of synthetic hydrotalcites in relation to composition
TL;DR: Ahstraet et al. as discussed by the authors used coprecipitation followed by hydrothermal treatment between 150 ~ and 250~C. Based on the structural formula [Mgl_xAlx(OH)~lX+l(COz)x/2 �9 mH20] x-, pure solid solutions were formed in the range Al/(Al + Mg) = 0.2 to 0.33, where m = (1 - 3x/ 2).
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Catalytic reactions by thermally activated, synthetic, anionic clay minerals
TL;DR: The thermal decomposition of a number of anionic clay minerals belonging to the pyroaurites-jogrenite group, such as hydrotalcite (Mg6Al2(OH)16(CO2−3) · 4H2O), results in a product (approximately Mg 6Al2O8(OH−)2) which is a fairly strong base (pKa ≤ 35) and a useful catalyst for vapor-phase aldol condensations as discussed by the authors.
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Crystal structures of some double hydroxide minerals
TL;DR: In this paper, three groups of minerals are discussed, which are typified by pyroaurite and sjogrenitc, hydrocalumite, and ettringite.