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
Synthesis of Water-Dispersible Single-Layer CoAl-Carbonate Layered Double Hydroxide
Haiping Li,Haiping Li,Thanh-Nhan Tran,Byong-Jun Lee,Chunfei Zhang,Jong-Deok Park,Tong-Hyun Kang,Jong-Sung Yu +7 more
TL;DR: This work provides the first simple way to prepare CO32- SL-LDHs and will open an avenue for synthesizing other SL- LDHs.
Journal ArticleDOI
Effect of lanthanum addition on microstructures and corrosion behavior of ZnAl-LDHs film of 6061 aluminum alloys
TL;DR: In this paper, the microstructures of ZnAl-LDHs films were investigated through the X-ray diffraction (XRD), scanning electronic microscope (SEM) and Xray photoelectron spectroscopy (XPS).
Journal ArticleDOI
A Co–Al Layered Double Hydroxides Nanosheets Thin-Film Electrode Fabrication and Electrochemical Study
TL;DR: In this paper, a highly oriented and densely packed Co-Al layered double hydroxides (LDHs) nanosheets thin-film electrode has been successfully fabricated by drying a transparent colloidal suspension of CoAl LDHs on a pretreated indium tin oxide-coated glass plate substrate.
Journal ArticleDOI
Preparation of Oriented Layered Double Hydroxide Film Using Electrophoretic Deposition and Its Application in Water Treatment
TL;DR: In this article, double hydroxide (LDH) films have been fabricated by the electrophoretic deposition method (EPD) on aluminum substrate, which can be used to remove heavy metal ion and anionic dye from aqueous solutions.
Journal ArticleDOI
An insight into the electrochemical behavior of Co/Al layered double hydroxide thin films prepared by electrodeposition
Erika Scavetta,Barbara Ballarin,Claudio Corticelli,Isacco Gualandi,Domenica Tonelli,Vanessa Prevot,Vanessa Prevot,Claude Forano,Claude Forano,Christine Mousty,Christine Mousty +10 more
TL;DR: In this paper, a detailed study of the electrochemical behavior of Co/Al-LDH thin films, prepared on Pt electrode by electrodeposition at −0.9 V, has been carried out.
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