Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation
Layered double hydroxides (LDHs), shown as the general formula of [M<sup>2+</sup><sub>1−x</sub>M<sup>3+</sup><sub>x</sub>(OH)<sub>2</sub>]<sup>x+</sup>(A<sup>n−</sup>)<sub>x/n</sub>∙yH<sub>2</sub...
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MDPI AG
2021-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1206 |
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| author | Rattanawadee (Ploy) Wijitwongwan Soontaree (Grace) Intasa-ard Makoto Ogawa |
| author_facet | Rattanawadee (Ploy) Wijitwongwan Soontaree (Grace) Intasa-ard Makoto Ogawa |
| author_sort | Rattanawadee (Ploy) Wijitwongwan |
| collection | DOAJ |
| description | Layered double hydroxides (LDHs), shown as the general formula of [M<sup>2+</sup><sub>1−x</sub>M<sup>3+</sup><sub>x</sub>(OH)<sub>2</sub>]<sup>x+</sup>(A<sup>n−</sup>)<sub>x/n</sub>∙yH<sub>2</sub>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<sup>3+</sup>/(M<sup>2+</sup> + M<sup>3+</sup>) 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<sup>2+</sup> Ga<sup>3+</sup>–LDHs with interlayer iodide were examined. The linear correlation between lattice parameter <i>a</i> and x value in the products with x of 0.06–0.24 was seen, suggesting the successful substitution of Mg<sup>2+</sup> in the brucite-like sheet with Ga<sup>3+</sup>. 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. |
| first_indexed | 2024-03-10T11:45:21Z |
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| id | doaj.art-81acebf3a5e34f8da6c18a78e95a6778 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T11:45:21Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-81acebf3a5e34f8da6c18a78e95a67782023-11-21T18:10:08ZengMDPI AGNanomaterials2079-49912021-05-01115120610.3390/nano11051206Preparation of MgGa Layered Double Hydroxides and Possible Compositional VariationRattanawadee (Ploy) Wijitwongwan0Soontaree (Grace) Intasa-ard1Makoto Ogawa2School of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, ThailandSchool of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, ThailandSchool of Energy Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), 555 Moo 1 Payupnai, Wangchan, Rayong 21210, ThailandLayered double hydroxides (LDHs), shown as the general formula of [M<sup>2+</sup><sub>1−x</sub>M<sup>3+</sup><sub>x</sub>(OH)<sub>2</sub>]<sup>x+</sup>(A<sup>n−</sup>)<sub>x/n</sub>∙yH<sub>2</sub>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<sup>3+</sup>/(M<sup>2+</sup> + M<sup>3+</sup>) 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<sup>2+</sup> Ga<sup>3+</sup>–LDHs with interlayer iodide were examined. The linear correlation between lattice parameter <i>a</i> and x value in the products with x of 0.06–0.24 was seen, suggesting the successful substitution of Mg<sup>2+</sup> in the brucite-like sheet with Ga<sup>3+</sup>. 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.https://www.mdpi.com/2079-4991/11/5/1206layered double hydroxideslayer charge density |
| spellingShingle | Rattanawadee (Ploy) Wijitwongwan Soontaree (Grace) Intasa-ard Makoto Ogawa Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation Nanomaterials layered double hydroxides layer charge density |
| title | Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation |
| title_full | Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation |
| title_fullStr | Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation |
| title_full_unstemmed | Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation |
| title_short | Preparation of MgGa Layered Double Hydroxides and Possible Compositional Variation |
| title_sort | preparation of mgga layered double hydroxides and possible compositional variation |
| topic | layered double hydroxides layer charge density |
| url | https://www.mdpi.com/2079-4991/11/5/1206 |
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