Journal ArticleDOI
Synthesis, anion exchange, and delamination of Co-Al layered double hydroxide: assembly of the exfoliated nanosheet/polyanion composite films and magneto-optical studies.
TLDR
This paper describes a systematic study on the synthesis, anion exchange, and delamination of Co-Al layered double hydroxide (LDH), with the aim of achieving fabrication and clarifying the properties of LDH nanosheet/polyanion composite films.Abstract:
This paper describes a systematic study on the synthesis, anion exchange, and delamination of Co-Al layered double hydroxide (LDH), with the aim of achieving fabrication and clarifying the properties of LDH nanosheet/polyanion composite films. Co-Al-CO3 LDH hexagonal platelets of 4 mum in lateral size were synthesized by the urea method under optimized reaction conditions. The as-prepared CO3(2-)-LDH was converted to Cl- -LDH by treating with a NaCl-HCl mixed solution, retaining its high crystallinity and hexagonal platelike morphology. LDHs intercalated with a variety of anions (such as NO3-, ClO4-, acetate, lactate, dodecyl sulfate, and oleate) were further prepared from Cl- -LDH via an anion-exchange process employing corresponding salts. Exchanged products in various anion forms were found to show different delamination behaviors in formamide. Among them, best results were observed for NO3- -LDH in terms of the exfoliating degree and the quality of the exfoliated nanosheets. The delamination gave a pink transparent suspension containing well-defined nanosheets with lateral sizes of up to 2 microm. The resulting nanosheets were assembled layer-by-layer with an anionic polymer, poly(sodium styrene 4-sulfonate) (PSS), onto quartz glass substrates to produce composite films. Magnetic circular dichroism (MCD) measurements revealed that the assembled multilayer films exhibited an interesting magneto-optical response.read more
Citations
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Microstructure-controlled synthesis of oriented layered double hydroxide thin films: Effect of varying the preparation conditions and a kinetic and mechanistic study of film formation
TL;DR: In this article, the microstructure-controlled synthesis of oriented layered double hydroxide (LDH) thin films on polystyrene substrates has been investigated in detail and the effect of varying the preparation conditions, such as the extent of sulfonation of the substrate, the total concentration of metal ions in the precursor solution, the temperature, and the reaction time are described.
Journal ArticleDOI
Size Engineering and Crystallinity Control Enable High-Capacity Aqueous Potassium-Ion Storage of Prussian White Analogues
TL;DR: In this article, the authors synthesize as-synthesized K1.93Fe[Fe (CN)6]0.97 · 1.82H2O nanoparticles with different gradients in crystallinity and size.
Journal ArticleDOI
Unique Lamellar Sodium/Potassium Iron Oxide Nanosheets: Facile Microwave-Assisted Synthesis and Magnetic and Electrochemical Properties
TL;DR: In this paper, a unique lamellar sodium/potassium iron oxide nanosheets consisting of two-dimensional iron oxide building blocks have been synthesized by microwave-assisted heating the suspension of iron(II) sulfate, sodium thiosulfate, and sodium hydroxide within 5 min.
Journal ArticleDOI
Condensation polymer/layered double hydroxide NCs: Preparation, characterization, and utilizations
TL;DR: In this article, a review of condensation polymers with layered double hydroxide (LDH) incorporated NCs and characterization of these NCs by morphological, mechanical, thermal and barrier properties, flame retardancy, and reduced gas permeability in contrast to the neat polymeric matrix.
Journal ArticleDOI
Preparation and characterization of lactate-intercalated Co–Fe layered double hydroxides and exfoliated nanosheet film with low infrared emissivity
TL;DR: In this article, a Co-Fe layered double hydroxides (LDHs) were successfully prepared by coprecipitation and hydrothermal method, and as-synthesized LDHs were studied by element chemical analysis, powder X-ray diffraction (XRD), FT-IR spectroscopy, thermogravitry (TG), differential scanning calorimetry (DSC), TEM.
References
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