Layered double hydroxide particles in hydrogel matrices
AssigneeDuke University
InventorsLena Esters Trotochaud, Mariana Vasquez Sanchez, Alina Kirillova
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Abstract
Exemplary layered double hydroxides (LDHs) may comprise a compound of formula Mg4−yAlXy(OH)2, wherein X is Mn+2, Cu+2, Zn+2, or Fe+2, and 0.01≤y≤1. Exemplary layered double hydroxide hydrogels (LDH-gels) may comprise a hydrogel and at least one LDH. Exemplary hydrogels may comprise polyethylene (glycol) diacrylate (PEGDA) or polyacrylamide (PAAm). Exemplary LDH-gels may comprise at least one LDH comprising a compound of formula Mg4−yAlXy(OH)2, wherein X is Mn+2, Cu+2, Zn+2, or Fe+2, and 0.01≤y≤1.
Claims18
1-19. (canceled)
A method of preparing layered double hydroxide (LDH) particles, the method comprising:
- preparing a metal ion solution comprising magnesium chloride (MgCl2), aluminum chloride (AlCl3), and a transition metal chloride (XCl2);
- adding a 2 M sodium hydroxide (NaOH) solution to the metal ion solution to form a first suspension comprising the LDH particles;
- centrifuging the first suspension and decanting a first supernatant or filtering the LDH particles;
- exposing the LDH particles to a 2 M sodium carbonate (Na2CO3) solution to form a second suspension comprising the LDH particles;
- centrifuging the second suspension and decanting a second supernatant or filtering the LDH particles;
- washing the LDH particles;
- drying the LDH particles;
- and
- calcining the LDH particles.
Dependencies are inferred from the claim text.