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
More filters
Journal ArticleDOI
2D materials: to graphene and beyond
TL;DR: This review comprises the current state-of-the-art of the vast literature in concepts and methods already known for isolation and characterization of graphene, and rationalizes the quite disperse literature in other 2D materials such as metal oxides, hydroxides and chalcogenides, and metal-organic frameworks.
Journal ArticleDOI
Synthesis and Characterization of Cobalt Hydroxide, Cobalt Oxyhydroxide, and Cobalt Oxide Nanodiscs
TL;DR: In this article, the authors synthesize cobalt hydroxide, cobalt oxyhydroxide and cobalt oxide nanomaterials through simple soft chemistry, and characterisation of these cobalt-based materials is fully developed, including X-ray diffraction, transmission electron microscopy combined with selected area electron diffraction.
Journal ArticleDOI
Fundamentals and advances in magnesium alloy corrosion
Mohsen Esmaily,Jan-Erik Svensson,S. Fajardo,S. Fajardo,Nick Birbilis,Gerald S. Frankel,Sannakaisa Virtanen,Raul Arrabal,Sebastian Thomas,Lars-Gunnar Johansson +9 more
TL;DR: There remains growing interest in magnesium (Mg) and its alloys, as they are the lightest structural metallic materials Mg alloys have the potential to enable design of lighter engineered systems, including positive implications for reduced energy consumption as mentioned in this paper.
Journal ArticleDOI
Recent development in 2D materials beyond graphene
TL;DR: In this article, a review highlights the recent progress of the state-of-the-art research on synthesis, characterization and isolation of single and few layer nanosheets and their assembly.
Journal ArticleDOI
Nanosheets of oxides and hydroxides: Ultimate 2D charge-bearing functional crystallites.
Renzhi Ma,Takayoshi Sasaki +1 more
TL;DR: The charge-bearing inorganic macromolecule-like nanosheets can be assembled or organized through various solution-based processing techniques to produce a range of nanocomposites, multilayer nanofilms, and core-shell nanoarchitectures, which have great potential for electronic, magnetic, optical, photochemical, and catalytic applications.
References
More filters
Journal ArticleDOI
Hydrotalcite-type anionic clays: Preparation, properties and applications.
Journal ArticleDOI
Room-Temperature Ferromagnetism in Transparent Transition Metal-Doped Titanium Dioxide
Yuji Matsumoto,Makoto Murakami,T. Shono,Tetsuya Hasegawa,Tomoteru Fukumura,Masashi Kawasaki,Parhat Ahmet,Toyohiro Chikyow,Shin-ya Koshihara,Hideomi Koinuma +9 more
TL;DR: The observation of transparent ferromagnetism in cobalt-doped anatase thin films with the concentration of cobalt between 0 and 8% is reported, indicating the existence of ferromagnetic long-range ordering.
Journal ArticleDOI
Magnetic and electric properties of transition-metal-doped ZnO films
TL;DR: In this article, a 3d transition metal-doped ZnO films (n-type Zn1−xMxO) were formed on sapphire substrates using a pulsed-laser deposition technique, and their magnetic and electric properties were examined.
Journal ArticleDOI
Anion-exchange properties of hydrotalcite-like compounds
TL;DR: Ion exchange isotherms between hydrotalcite-like (HT) ions were determined and the spacing and width of the 003 reflection were measured as a function of HT composition as mentioned in this paper.
Related Papers (5)
Recent advances in the synthesis and application of layered double hydroxide (LDH) nanosheets.
Qiang Wang,Dermot O'Hare +1 more