Hydrotalcite-like compounds: Versatile layered hosts of molecular anions with biological activity

Costantino, U.; Ambrogi, Valeria; Nocchetti, Morena; Perioli, Luana

doi:10.1016/j.micromeso.2007.02.005

Cited by 281 publications

(155 citation statements)

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“…LDHs have a wide range of applications in many fields, e.g., as catalysts or catalyst precursors, ion exchangers, adsorbents for environmental contaminants, and substrates for the immobilization of biological material [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Thermal decomposition of the LDH at high temperature leads to the formation of mixed metal oxide (MMO) materials composed of spinel-like (M Ⅱ M Ⅲ 2 O 4 ) phases and other metal oxide phases (M Ⅱ O) and previous studies have shown that such materials can be used as catalysts and catalyst supports, sensors, and Li-ion battery electrodes [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Zhao

Wang

et al. 2010

Nano Res.

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NiFe 2 O 4 nanoparticles (<10 nm) embedded in a NiO matrix have been fabricated by calcining the corresponding Ni Ⅱ Fe Ⅲ -layered double hydroxide (LDH) precursors at high temperature (500 °C ). Compared with the NiFe 2 O 4 /NiO nanocomposite obtained by calcination of a precursor prepared by a traditional chemical coprecipitation method, those derived from NiFe-LDH precursors show much higher blocking temperatures (T B ) (~380 K). The enhanced magnetic stability can be ascribed to the much stronger interfacial interaction between NiFe 2 O 4 and NiO phases due to the topotactic nature of the transformation of the LDH precursor to the NiFe 2 O 4 /NiO composite material. Through tuning the Ni Ⅱ /Fe Ⅲ molar ratio of the NiFe-LDH precursor, the NiFe 2 O 4 concentration can be precisely controlled, and the T B value as well as the magnetic properties of the final material can also be regulated. This work represents a successful example of the fabrication of ferro(ferri)magnetic (FM)/antiferrimagnetic (AFM) systems with high magnetic stability from LDH precursors. This method is general and may be readily extended to other FM/AFM systems due to the wide range of available LDH precursors.

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Section: Introductionmentioning

confidence: 99%

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Zhao

Wang

et al. 2010

Nano Res.

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“…For the synthesis of hydrotalcite-type anionic clay, coprecipitation method at low supersaturation and constant pH was selected, being the most frequently used method to prepare the anionic clays (25)(26)(27)(35)(36)(37)(38)(39). Solution A, consisting of 1 mol of Mg(NO 3 ) 2 ·6H 2 O and 0.2 mol of Al(NO 3 ) 3 ·9H 2 O dissolved in 700 mL of distilled water, and solution B, containing 3.5 mol of NaOH and 0.943 mol of Na 2 CO 3 in 1 L of distilled water, were prepared at 35 °C.…”

Section: Preparation and Characterization Of Hydrotalcite-type Anionimentioning

confidence: 99%

“…Having diff raction pa erns very similar or identical to that of hydrotalcite, i.e. Mg 6 Al 2 (CO 3 )(OH) 16 ·4H 2 O, they have also been referred to as hydrotalcites, hydrotalcite-like compounds or hydrotalcite-type anionic clays (25)(26)(27). Unlike the anion exchange resins, the anionic clays are less expensive and can be easily prepared in laboratory.…”

Section: Introductionmentioning

confidence: 99%

“…Unlike the anion exchange resins, the anionic clays are less expensive and can be easily prepared in laboratory. Moreover, hydrotalcites are ingestible and widely used as antacid, antipepsin and gastric mucosa protection agents in the pharmaceutical industry (26,(28)(29)(30)(31)(32). Accordingly, due to their benefi cial health eff ects, they can be added to the fermented dairy product.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of Batch Lactic Acid Fermentation in the Presence of Anionic Clay

Jinescu

Aruş

Pârvulescu

et al. 2014

Food. Technol. Biotechnol.

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SummaryBatch fermentation of milk inoculated with lactic acid bacteria was conducted in the presence of hydrotalcite-type anionic clay under static and ultrasonic conditions. An experimental study of the eff ect of fermentation temperature (t=38-43 °C), clay/milk ratio (R=1-7.5 g/L) and ultrasonic fi eld (ν=0 and 35 kHz) on process dynamics was performed. A mathematical model was selected to describe the fermentation process kinetics and its parameters were estimated based on experimental data. A good agreement between the experimental and simulated results was achieved. Consequently, the model can be employed to predict the dynamics of batch lactic acid fermentation with values of process variables in the studied ranges. A statistical analysis of the data based on a 2 3 factorial experiment was performed in order to express experimental and model-regressed process responses depending on t, R and ν factors.

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“…Hydrotalcite has also found pharmaceutical applications as an ingredient in sustained-release pharmaceuticals containing nifedipine, for stabilising pharmaceutical composition, and for preparing aluminium magnesium salts of antipyretic, analgesic and anti-inflammatory drugs. 102 One principal area that has been the focus of intense research in recent years is the use of LDH hosts as storage and delivery devices for biologically important species. A number of important bioactive species are based on carboxylic acids, and hence are suitable for intercalation into LDHs.…”

Section: Pharmaceutical and Cosmetic Applicationsmentioning

confidence: 99%

Functional Materials - Syntheses, Characterisation and Catalytic Applications

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Hydrotalcite-like compounds: Versatile layered hosts of molecular anions with biological activity

Cited by 281 publications

References 50 publications

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Exchange-biased NiFe2O4/NiO nanocomposites derived from NiFe-layered double hydroxides as a single precursor

Modelling of Batch Lactic Acid Fermentation in the Presence of Anionic Clay

Functional Materials - Syntheses, Characterisation and Catalytic Applications

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