Stability of polytypes 3R2 Mg-Al Layered Double Hydroxides towards various anions
Source abstract
Abstract
Abstract Polytype 3R2 Mg-Al layered double hydroxides contain tetrahedral aluminates ion in its interlayer. In this research, the possibility of other tetrahedral coordinated ions to mediate the 3R2 layer stacking was investigated in the two-step hydrothermal synthesis at 170 °C. None of the investigated tetrahedrally coordinated ions, such as sulphate, borate or gallate could mediate the formation of the 3R2 stacking in the two step synthesis. Ion exchange of aluminate ions in the interlayer of polytype 3R2 is feasible in the following order of preference: CO32− > SO42− > stearate > C2O42− > Br−. The 3R2 stacking is however not conserved, as the ion exchanged products have 3R1 stacking sequence.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Layered Double Hydroxides Synthesis and Applications · Magnesium Oxide Properties and Applications · Inorganic Chemistry and Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
Show source-provided references
1. Synthesis of Al-rich hydrotalcite-like compounds by using the urea hydrolysis reaction-control of size and morphology10.1039/B302747N ↗
2. Anion-exchange in takovite – applications to other hydroxide minerals10.3406/bulmi.1980.7392 ↗
3. Polytype diversity of the hydrotalcite-like minerals; I, Possible polytypes and their diffraction features10.1346/CCMN.1993.0410504 ↗
4. Polytype diversity of the hydrotalcite-like minerals; II, Determination of the polytypes of experimentally studied varieties10.1346/CCMN.1993.0410505 ↗
5. Structures and Mineralogy of Clay Minerals
6. Stability and transformation kinetics of 3R1 and 3R2 polytypes of Mg-Al layered double hydroxides10.1016/j.clay.2009.11.048 ↗
7. Chemical composition and interlayer arrangement of polytype 3R2 Mg-Al hydroxide10.1016/j.clay.2011.03.020 ↗
8. Hydrotalcite-type anionic clays: preparation, properties and applications10.1016/0920-5861(91)80068-K ↗
9. Basic properties of Mg1-X(2+)Alx(3+) layered double hydroxides intercalated by carbonate, hydroxide chloride and sulfate anions10.1021/ic00108a020 ↗
10. New synthetic routes to hydrotalcite-like compounds: characterisation and properties of the obtained materials10.1002/(SICI)1099-0682(199810)1998:10<1439::AID-EJIC1439>3.0.CO;2-1 ↗
11. Recent progress in the synthesis and application of organically modified hydrotalcites10.1524/zkri.2009.1153 ↗
12. Structural Aspects of Layered Double Hydroxides
13. Preparation of layered double hydroxides
14. Thermodynamics of anion exchange on a chloride-intercalated zinc–aluminum layered double hydroxide: a microcalorimetric study10.1039/a906346c ↗
15. Preparation of sodium oleate/layered double hydroxide composites with acid-resistant properties10.1016/j.jcis.2006.01.033 ↗
16. Preparation and characterization of poly(vinyl chloride)/layered double hydroxide nanocomposites with enhanced thermal stability10.1016/j.polymer.2008.07.014 ↗
17. Mn2Al-LDH- and Co2Al-LDH-stearate as photodegradants for LDPE film10.1016/j.polymdegradstab.2009.03.007 ↗
18. Synthesis of anionic clays by hydrothermal crystallization of amorphous precursors10.1016/0169-1317(95)00017-X ↗
19. Anion-exchange properties of hydrotalcite-like compounds10.1346/CCMN.1983.0310409 ↗
20. Synthesis of the 3R(2) polytype of a hydrotalcite-like mineral10.1039/b110715c ↗
21. Preparation of Mg/Al layered double hydroxide–oleate intercalation compound by a reconstruction method under hydrothermal condition10.1246/cl.2005.810 ↗
22. Sol–gel synthesis of hydrotalcite like compounds10.1007/s10853-005-5347-4 ↗
23. Syntheses of disordered and Al-rich hydrotalcite-like compounds10.1346/CCMN.1986.0340502 ↗
24. Layered Double Hydroxides (Ldhs)
25. Polytype selection and structural disorder mediated by intercalated sulfate ions among the layered double hydroxides of Zn with Al and Cr10.1021/cg801259n ↗
26. Polytype selection by intercalated anions: design and synthesis of the 3R2 polytype of the layered double hydroxyde of Zn and Al10.1021/cg101707n ↗
27. The thermal decomposition of Mg-Al hydrotalcites: effects of interlayer anions and characteristics of the final structure10.1002/1521-3765(20021216)8:24<5571::AID-CHEM5571>3.0.CO;2-R ↗
28. Preparation and characterization of sol–gel MgAl hydrotalcites with nanocapsular morphology10.1021/jp065283h ↗