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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Homogeneous precipitation synthesis and electrochemical performance of LiFePO4/CNTs/C composites as advanced cathode materials for lithium ion batteries
TL;DR: In this article, a series of LiFePO4/CNTs/C composite cathode materials for Li-ion batteries were synthesized by a simple homogeneous precipitation and subsequent annealing process.
Journal ArticleDOI
General Synthesis of Layered Rare-Earth Hydroxides (RE = Sm, Eu, Gd, Tb, Dy, Ho, Er, Y) and Direct Exfoliation into Monolayer Nanosheets with High Color Purity.
Mingjun Bai,Mingjun Bai,Xiaohe Liu,Nobuyuki Sakai,Yasuo Ebina,Lulu Jia,Dai-Ming Tang,Takayoshi Sasaki,Renzhi Ma +8 more
TL;DR: In this article, organic dodecyl sulfate (C12H25SO4-, DS-) was used to prepare layered rare-earth hydroxides (LREHs) for optical and magnetic materials, while it is hard to obtain monolayer nanosheets through a direct exfoliation.
Journal ArticleDOI
Structure, Delamination and Luminescence of Layered Dysprosium Hydroxides and the Generation of White Light with 2D Crystals
TL;DR: In this article, the authors synthesize layered dysprosium hydroxides intercalated with dodecyl sulfate ions (DS−LDyHs) using homogenous precipitation technique.
Journal ArticleDOI
Facile synthesis of polymer monolith functionalized with layered double hydroxide as effective preconcentration materials for fluorescent whitening agents
TL;DR: In this paper, a novel monolithic capillary column functionalized with layered double hydroxide (LDH) was developed and exploited for the separation and preconcentration of fluorescent whitening agents combined with high performance liquid chromatography.
Journal ArticleDOI
Nacre-inspired polyglutamic acid/layered double hydroxide bionanocomposite film with high mechanical, translucence and UV-blocking properties
TL;DR: In this article, a fast green vacuum-filtration method was used to fabricate strong and multifunctional polyglutamic acid/layered double hydroxide (PGA/LDH) films mimicking nacre.
References
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