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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Journal ArticleDOI
Friction behavior of Mg-Al-CO3 layered double hydroxide prepared by magnesite
TL;DR: In this paper, a modified Mg-Al-CO3 (GMAC-LDH) was prepared by magnesite under chemical precipitation and hydrothermal methods to improve the dispersion of LDH in base oil.
Journal ArticleDOI
An in situ recovery method to prepare carbon-coated Zn–Al–hydrotalcite as the anode material for nickel–zinc secondary batteries
TL;DR: In this paper, the structure and morphology of carbon-coated Zn-Al-hydrotalcite (Zn-LDH) and pristine Zn−Al−LDH were investigated using X-ray diffraction, scanning electron microscopy (SEM), TEM, and X-Ray photoelectron spectroscopy (XPS) measurements.
Book ChapterDOI
Layered Double Hydroxide Materials: Assembly and Photofunctionality
TL;DR: In this paper, the optical properties of layered double hydroxides (LDHs) and related potential applications are described, and perspectives on the future development of LDH-based solid-state luminescent materials are addressed.
Journal ArticleDOI
Flexible Active-Site Engineering of Monometallic Co-Layered Double Hydroxides for Achieving High-Performance Bifunctional Electrocatalyst toward Oxygen Evolution and H2O2 Reduction.
TL;DR: This work developed a convenient, efficient, and scalable method for the construction of monometallic Co-LDHs with tunable Con+ (n=2, 3) concentration by a one-pot solvothermal reaction in a short time using only cobalt nitrate and hexamine as raw materials.
Journal ArticleDOI
Exfoliation and liquid crystal phase formation of layered double hydroxide into waterborne polyurethane coatings
Anne-Lise Troutier-Thuilliez,Horst Hintze-Bruening,Christine Taviot-Guého,Vincent Verney,Fabrice Leroux +4 more
TL;DR: In this article, the impact of the nature of the charge balancing anions of the layered double hydroxides (LDH) phase on the kinetics of the polymer intercalation and the film building as well as on the degree of particle dispersion was demonstrated.
References
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Journal ArticleDOI
Anion-exchange properties of hydrotalcite-like compounds
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