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Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation.
- Source :
-
Nanomaterials (Basel, Switzerland) [Nanomaterials (Basel)] 2021 May 01; Vol. 11 (5). Date of Electronic Publication: 2021 May 01. - Publication Year :
- 2021
-
Abstract
- Layered double hydroxides (LDHs), shown as the general formula of [M <superscript>2+</superscript> <subscript>1-x</subscript> M <superscript>3+</superscript> <subscript>x</subscript> (OH) <subscript>2</subscript> ] <superscript>x+</superscript> (A <superscript>n-</superscript> ) <subscript>x/n</subscript> ∙yH <subscript>2</subscript> O, are useful for various applications such as anion exchangers/adsorbents, catalysts and catalysts' supports, and drug/gene carriers due to their structural, compositional and morphological characteristics and their variation. The x value (M <superscript>3+</superscript> /(M <superscript>2+</superscript> + M <superscript>3+</superscript> ) ratio) in layered double hydroxides (LDHs), corresponding to the layer charge density, is one of the important parameters for controlling the properties of LDHs. The x values in commonly available LDHs are limited (0.2 < x < 0.3). In order to obtain LDHs with x < 0.2, Mg <superscript>2+</superscript> Ga <superscript>3+</superscript> -LDHs with interlayer iodide were examined. The linear correlation between lattice parameter a and x value in the products with x of 0.06-0.24 was seen, suggesting the successful substitution of Mg <superscript>2+</superscript> in the brucite-like sheet with Ga <superscript>3+</superscript> . Carbonate and dodecyl sulfate types MgGa-LDH were prepared by ion exchange with carbonate anion and reconstruction in aqueous solution of sodium dodecyl sulfate. The products with x of 0.06 were dispersed in water and hexanol better than those with x of 0.24 for MgGa-LDHs containing carbonate and dodecyl sulfate, respectively, suggesting effects of the lower layer charge density on the dispersion.
Details
- Language :
- English
- ISSN :
- 2079-4991
- Volume :
- 11
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Nanomaterials (Basel, Switzerland)
- Publication Type :
- Academic Journal
- Accession number :
- 34062941
- Full Text :
- https://doi.org/10.3390/nano11051206