Preparation of Layered Double Hydroxide–Organic Intercalation Compounds by Solid–Solid Reactions

Kuramoto, Kyoko; Ogawa, Makoto

doi:10.1246/bcsj.20110020

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…Such a reaction could be carried out mechanochemicallysimply by grinding the reactants together. Mechanochemical synthesis and anion exchange reactions of LDH are known. , However, no attempts have been made so far to use carbonate-intercalated LDH as precursors for mechanochemical anion exchange. XRD patterns of the products obtained on the mechanochemical reaction of MgAl carbonate-LDH with ammonium salts of different anions are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Solvent-Mediated and Mechanochemical Methods for Anion Exchange of Carbonate from Layered Double Hydroxides Using Ammonium Salts

Bhojaraj¹,

Arulraj²,

Kolinjavadi³

et al. 2019

ACS Omega

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Deintercalation of carbonate from layered double hydroxides (LDH) followed by intercalation of another anion (decarbonative intercalation) is a good method for the synthesis of crystalline LDH with different intercalated anions. We have carried out decarbonative intercalation of halides, nitrate, acetate, and sulfate by refluxing the carbonate-LDH with the corresponding ammonium salt in 1-butanol to obtain ordered LDH incorporating the desired anion. The crystallinity of the precursor LDH is retained in the anion-exchanged products, making this reaction a useful tool to prepare ordered LDH containing various anions. In addition, the morphology of the LDH is also retained after the exchange, making the reaction morphotactic. As the reaction is facilitated by the weak acidity of the ammonium salt, just grinding the carbonate-LDH with the ammonium salt of the desired anion also results in anion exchange. However, while the crystallinity of the LDH is retained, the morphology changes possibly due to breaking up of the crystals during the reaction.

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Section: Resultsmentioning

confidence: 99%

Solvent-Mediated and Mechanochemical Methods for Anion Exchange of Carbonate from Layered Double Hydroxides Using Ammonium Salts

Bhojaraj¹,

Arulraj²,

Kolinjavadi³

et al. 2019

ACS Omega

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“…The TS-LDH was used as the starting material for the anion exchange reaction with the dodecyl sulfate anion (abbreviated as DS). The XRD patterns showed the increasing of the basal spacing from 1.77 nm to 3.09 nm, and FTIR results also confirmed the formation of DS-LDH with the absence of absorption bands due to carbonate anions which was the advantage of the synthesis approach [144].…”

Section: Mechanochemical Synthesesmentioning

confidence: 65%

“…The solid-state formation of organic anion intercalated LDHs has been reported [144,145]. MgAl-LDH intercalated with p-toluenesulfonate (TS-LDH), malonate (M-LDH), and oxalate anions (O-LDH) were synthesized by milling Mg(OH) 2 and Al(OH) 3 in the planetary ball mill for 1 h and subsequent milling with organic anions for another 1 h. The XRD patterns showed the diffraction patterns pointed to LDH materials with a d value of 1.77, 0.88, and 0.86 nm for TS-LDH, M-LDH, and O-LDH, respectively, indicating the successful synthesis of materials.…”

Section: Mechanochemical Synthesesmentioning

confidence: 99%

Preparation of Layered Double Hydroxides toward Precisely Designed Hierarchical Organization

2019

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Layered double hydroxides (LDHs) are a class of materials with useful properties associated with their anion exchange abilities for a wide range of materials’ applications including adsorbent, catalyst and its support, ceramic precursor, and drug carrier. In order to satisfy the requirements for the detailed characterization and the practical application, the preparation of LDHs with varied composition and particle morphology has been examined extensively. The versatility of the preparation methods led LDHs with varied composition and micro/macroscopic morphology, which makes the application of LDHs more realistic. In the present review article, synthetic methods of LDHs are overviewed in order to highlight the present status of the LDHs for practical application.

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“…The method is an easy, environmentally friendly method applicable for a series of LDH with different structures and properties . A similar synthetic method, the hydrothermal treatment of aqueous slurries, was reported to prepare LDHs. − As a simple synthetic mean, solid–solid reactions have successfully been applied for the LDH preparation. − Thus, LDH preparation is possible by a variety of methods, and the products’ characteristics such as particle shape and size reflect the synthetic paths and conditions. Accordingly, the development of a synthetic path to LDHs is useful toward LDHs with novel functions as well as modified performance for the ongoing application related researches.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Finite Particles of Nitrate Forms of Layered Double Hydroxides by pH Adjustment with Anion Exchange Resin

Naito¹,

Nitoh²,

Ayral

et al. 2012

Ind. Eng. Chem. Res.

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Well-defined finite particles of nitrate forms of layered double hydroxides (MgAl and NiAl types) were successfully synthesized from aqueous solution of metal nitrates by the recently developed pH adjustment method, where hydroxide form ion-exchange resin was used to change a starting acidic solution into basic solution for the hydroxide formation. The interlayer nitrate ion of layered double hydroxide was exchanged with such anions as dodecylsulfate and oleate to form intercalation compounds by conventional anion exchange reactions in aqueous media at room temperature, suggesting potential of the methods as well as the present materials for further study on the applications of LDHs.

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Preparation of Layered Double Hydroxide–Organic Intercalation Compounds by Solid–Solid Reactions

Cited by 10 publications

References 33 publications

Solvent-Mediated and Mechanochemical Methods for Anion Exchange of Carbonate from Layered Double Hydroxides Using Ammonium Salts

Solvent-Mediated and Mechanochemical Methods for Anion Exchange of Carbonate from Layered Double Hydroxides Using Ammonium Salts

Preparation of Layered Double Hydroxides toward Precisely Designed Hierarchical Organization

Preparation of Finite Particles of Nitrate Forms of Layered Double Hydroxides by pH Adjustment with Anion Exchange Resin

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