Synthesis of dense porous layered double hydroxides from struvite

Abstract

We report an atom economic synthesis of a new type of dense porous layered double hydroxides (S-LDHs) using struvite which is a commonly produced undesirable waste in wastewater treatment plants....

Surface modification of two-dimensional layered double hydroxide nanoparticles with biopolymers for biomedical applications

“…x/m ÁnH 2 O], where M(II) and M(III) are metal cations in the octahedral positions and A is the anion [17]. The composition can be derived from brucite (Mg(OH) 2 ) by isomorphous substitution of M (II) metal ions to M(III) [18][19][20]. The detailed structure of the LDH is presented in Fig.…”

Distinguishing Anionic Species That Are Intercalated in Layered Double Hydroxides from Those Bound to Their Surface: A Comparative IR Study

“…One of the most often used anionexchange families is the layered double hydroxides (LDHs) in which the positive charges of the double (M 2+ and M 3+ ) metal hydroxide layers were compensated by interlamellar solvated anions. 20,21 These interlayer anions can be further exchanged with more or less difficulties by different type of anions such as amino carboxylates, 22,23 polyoxometallates, 24 Schiff-base complexes, 25 polymeric anions, 26 DNA, 27 etc. In parallel to this process, surface adsorption of the guest molecules could also occur.…”

“…To modify 2D ion-intercalated compounds, many different intercalation (wet-) chemical methods have been reported; based on these results, a large number of mixed inorganic or organo-layered composite materials were built up. − Through corresponding ion-exchange properties, these compounds can be divided into two groups, i.e., cation- and anion-exchanging materials. One of the most often used anion-exchange families is the layered double hydroxides (LDHs) in which the positive charges of the double (M 2+ and M 3+ ) metal hydroxide layers were compensated by interlamellar solvated anions. , These interlayer anions can be further exchanged with more or less difficulties by different type of anions such as amino carboxylates, , polyoxometallates, Schiff-base complexes, polymeric anions, DNA, etc. In parallel to this process, surface adsorption of the guest molecules could also occur …”

CoFe-Layered Double Hydroxide Coupled with Pd Particles for Electrocatalytic Ethanol Oxidation

“…The results indicated that Pd transferred electrons to Co and Fe in the LDH support, which was evidence of the strong interaction of Pd nanoparticles with the LDH substrate. Besides, four distinct components could be seen in the O 1s spectra for Co 1 Fe 3 –LDH/NF and Pd/Co 1 Fe 3 –LDH/NF (Figure d), including the peak located at around 530.2 eV corresponding to oxygen vacancy (V O ), the peak located at around 530.9 eV appertaining to M–O (M = Pd, Co, Fe), the peak at around 531.6 eV belonging to absorbed H 2 O, and the peak at 532.8 eV corresponding to CO 3 2– , which well matched with those reported LDH materials containing interlayer carbonate anions . The relative area ratios of V O to M–O to H 2 O were about 0.21:1.16:1 for Pd/Co 1 Fe 3 –LDH/NF and 0.35:0.92:1 for Co 1 Fe 3 –LDH/NF, proving that Pd nanoparticles anchored on Co 1 Fe 3 –LDH via O atoms and V O sites.…”